!= - Determines if one value is not equal to another.
#define - Defines a macro.
#include - Includes an external file for processing.
#undef - Un-defines a macro.
#ifdef - Conditional reading of code.
#ifndef - Conditional reading of code.
$NAME - Calls a defined macro.
% - Modulus operator.
&& - Logical AND operator.
> - Determines if one value is greater than another.
>= - Determines if one value is greater than or equal to another.
< - Determines if one value is less than another.
<= - Determines if one value is less than or equal to another.
* - Multiplication operator.
+ - Addition operator
- - Subtraction operator.
/ - Division operator.
= - Performs a simple assignment.
== - Compares two values for equality.
^ - Power of operator.
round - Returns the integer value nearest to x ; if the fractional part of x is exactly 0.5, the direction of rounding is undefined.
|| - Logical OR operator.
0dbfs - Sets the value of 0 decibels using full scale amplitude.
& - Bitwise AND operator.
| - Bitwise OR operator.
¬ - Bitwise NOT operator.
# - Bitwise NON EQUIVALENCE operator.
a - Converts a k-rate parameter to an a-rate value with interpolation.
abetarand - Deprecated.
abexprnd - Deprecated.
abs - Returns an absolute value.
acauchy - Deprecated.
active - Returns the number of active instances of an instrument.
adsr - Calculates the classical ADSR envelope using linear segments.
adsyn - Output is an additive set of individually controlled sinusoids, using an oscillator bank.
adsynt - Performs additive synthesis with an arbitrary number of partials, not necessarily harmonic.
adsynt2 - Performs additive synthesis with an arbitrary number of partials -not necessarily harmonic- with interpolation.
aexprand - Deprecated.
aftouch - Get the current after-touch value for this channel.
agauss - Deprecated.
agogobel - Deprecated.
alinrand - Deprecated.
alpass - Reverberates an input signal with a flat frequency response.
ampdb - Returns the amplitude equivalent of the decibel value x.
ampdbfs - Returns the amplitude equivalent of the decibel value x, which is relative to full scale amplitude.
ampmidi - Get the velocity of the current MIDI event.
apcauchy - Deprecated.
apoisson - Deprecated.
apow - Deprecated.
areson - A notch filter whose transfer functions are the complements of the reson opcode.
aresonk - A notch filter whose transfer functions are the complements of the reson opcode.
atone - A hi-pass filter whose transfer functions are the complements of the tone opcode.
atonek - A hi-pass filter whose transfer functions are the complements of the tonek opcode.
atonex - Emulates a stack of filters using the atone opcode.
atrirand - Deprecated.
ATSadd - uses the data from an ATS analysis file to perform additive synthesis.
ATSaddnz - uses the data from an ATS analysis file to perform noise resynthesis.
ATSbufread - reads data from and ATS data file and stores it in an internal data table of frequency, amplitude pairs.
ATScross - perform cross synthesis from ATS analysis files.
ATSinfo - reads data out of the header of an ATS file.
ATSinterpread - allows a user to determine the frequency envelope of any ATSbufread.
ATSread - reads data from an ATS file.
ATSreadnz - reads data from an ATS file.
ATSpartialtap - returns a frequency, amplitude pair from an ATSbufread opcode.
ATSsinnoi - uses the data from an ATS analysis file to perform resynthesis.
aunirand - Deprecated.
aweibull - Deprecated.
babo - A physical model reverberator.
balance - Adjust one audio signal according to the values of another.
bamboo - Semi-physical model of a bamboo sound.
barmodel - Creates a tone similar to a stuck metal bar.
bbcutm - Generates breakbeat-style cut-ups of a mono audio stream.
bbcuts - Generates breakbeat-style cut-ups of a stereo audio stream.
betarand - Beta distribution random number generator (positive values only).
bexprnd - Exponential distribution random number generator.
bformenc - Codes a signal into the ambisonic B format
bformdec - Decodes an ambisonic B format signal
binit - PVS tracks to amplitude+frequency conversion.
biquad - A sweepable general purpose biquadratic digital filter.
biquada - A sweepable general purpose biquadratic digital filter with a-rate parameters.
birnd - Returns a random number in a bi-polar range.
bqrez - A second-order multi-mode filter.
butbp - Same as the butterbp opcode.
butbr - Same as the butterbr opcode.
buthp - Same as the butterhp opcode.
butlp - Same as the butterlp opcode.
butterbp - A band-pass Butterworth filter.
butterbr - A band-reject Butterworth filter.
butterhp - A high-pass Butterworth filter.
butterlp - A low-pass Butterworth filter.
button - Sense on-screen controls.
buzz - Output is a set of harmonically related sine partials.
cabasa - Semi-physical model of a cabasa sound.
cauchy - Cauchy distribution random number generator.
ceil - Returns the smallest integer not less than x
cent - Calculates a factor to raise/lower a frequency by a given amount of cents.
cggoto - Conditionally transfer control on every pass.
chanctrl - Get the current value of a MIDI channel controller.
changed - k-rate signal change detector.
chani - Reads data from the software bus
chano - Send data to the outwards software bus
checkbox - Sense on-screen controls.
chn - Declare a channel of the named software bus.
chnclear - Clears an audio output channel of the named software bus.
chnexport - Export a global variable as a channel of the bus.
chnget - Reads data from the software bus.
chnmix - Writes audio data to the named software bus, mixing to the previous output.
chnparams - Query parameters of a channel.
chnset - Writes data to the named software bus.
cigoto - Conditionally transfer control during the i-time pass.
ckgoto - Conditionally transfer control during the p-time passes.
clear - Zeroes a list of audio signals.
clfilt - Implements low-pass and high-pass filters of different styles.
clip - Clips a signal to a predefined limit.
clock - Deprecated.
clockoff - Stops one of a number of internal clocks.
clockon - Starts one of a number of internal clocks.
cngoto - Transfers control on every pass when a condition is not true.
comb - Reverberates an input signal with a colored frequency response.
compress - Compress, limit, expand, duck or gate an audio signal.
control - Configurable slider controls for realtime user input.
convle - Same as the convolve opcode.
convolve - Convolves a signal and an impulse response.
cos - Performs a cosine function.
cosh - Performs a hyperbolic cosine function.
cosinv - Performs a arccosine function.
cps2pch - Converts a pitch-class value into cycles-per-second for equal divisions of the octave.
cpsmidi - Get the note number of the current MIDI event, expressed in cycles-per-second.
cpsmidib - Get the note number of the current MIDI event and modify it by the current pitch-bend value, express it in cycles-per-second.
cpsoct - Converts an octave-point-decimal value to cycles-per-second.
cpspch - Converts a pitch-class value to cycles-per-second.
cpstmid - Get a MIDI note number (allows customized micro-tuning scales).
cpstun - Returns micro-tuning values at k-rate.
cpstuni - Returns micro-tuning values at init-rate.
cpsxpch - Converts a pitch-class value into cycles-per-second (Hz) for equal divisions of any interval.
cpuprc - Control allocation of cpu resources on a per-instrument basis, to optimize realtime output.
cross2 - Cross synthesis using FFT's.
crunch - Semi-physical model of a crunch sound.
ctrl14 - Allows a floating-point 14-bit MIDI signal scaled with a minimum and a maximum range.
ctrl21 - Allows a floating-point 21-bit MIDI signal scaled with a minimum and a maximum range.
ctrl7 - Allows a floating-point 7-bit MIDI signal scaled with a minimum and a maximum range.
ctrlinit - Sets the initial values for a set of MIDI controllers.
cuserrnd - Continuous USER-defined-distribution RaNDom generator.
dam - A dynamic compressor/expander.
date - Returns the number seconds since 1 January 1970.
dates - Returns as a string the date and time specified.
db - Returns the amplitude equivalent for a given decibel amount.
dbamp - Returns the decibel equivalent of the raw amplitude x.
dbfsamp - Returns the decibel equivalent of the raw amplitude x, relative to full scale amplitude.
dcblock - A DC blocking filter.
dconv - A direct convolution opcode.
delay - Delays an input signal by some time interval.
delay1 - Delays an input signal by one sample.
delayk - Delays an input signal by some time interval.
delayr - Reads from an automatically established digital delay line.
delayw - Writes the audio signal to a digital delay line.
deltap - Taps a delay line at variable offset times.
deltap3 - Taps a delay line at variable offset times, uses cubic interpolation.
deltapi - Taps a delay line at variable offset times, uses interpolation.
deltapn - Taps a delay line at variable offset times.
deltapx - Read to or write from a delay line with interpolation.
deltapxw - Mixes the input signal to a delay line.
denorm - Mixes low level noise to a list of a-rate signals
diff - Modify a signal by differentiation.
diskgrain - Synchronous granular synthesis, using a soundfile as source.
diskin - Reads audio data from an external device or stream and can alter its pitch.
diskin2 - Reads audio data from a file, and can alter its pitch using one of several available interpolation types, as well as convert the sample rate to match the orchestra sr setting.
dispfft - Displays the Fourier Transform of an audio or control signal.
display - Displays the audio or control signals as an amplitude vs. time graph.
distort - Distort an audio signal via waveshaping and optional clipping.
distort1 - Modified hyperbolic tangent distortion.
divz - Safely divides two numbers.
downsamp - Modify a signal by down-sampling.
dripwater - Semi-physical model of a water drop.
dssiactivate - Activates or deactivates a DSSI or LADSPA plugin.
dssiaudio - Processes audio using a LADSPA or DSSI plugin.
dssictls - Send control information to a LADSPA or DSSI plugin.
dssiinit - Loads a DSSI or LADSPA plugin.
dssilist - Lists all available DSSI and LADSPA plugins.
dumpk - Periodically writes an orchestra control-signal value to an external file.
dumpk2 - Periodically writes two orchestra control-signal values to an external file.
dumpk3 - Periodically writes three orchestra control-signal values to an external file.
dumpk4 - Periodically writes four orchestra control-signal values to an external file.
duserrnd - Discrete USER-defined-distribution RaNDom generator.
else - Executes a block of code when an "if...then" condition is false.
elseif - Defines another "if...then" condition when a "if...then" condition is false.
endif - Closes a block of code that begins with an "if...then" statement.
endin - Ends the current instrument block.
endop - Marks the end of an user-defined opcode block.
envlpx - Applies an envelope consisting of 3 segments.
envlpxr - The envlpx opcode with a final release segment.
eqfil - Equalizer filter
event - Generates a score event from an instrument.
event_i - Generates a score event from an instrument.
exitnow - Exit csound as fast as possible, with no cleaning up.
exp - Returns e raised to the x-th power.
expcurve - This opcode implements a formula for generating a normalised exponential curve in range 0 - 1. It is based on the Max / MSP work of Eric Singer (c) 1994.
expon - Trace an exponential curve between specified points.
exprand - Exponential distribution random number generator (positive values only).
expseg - Trace a series of exponential segments between specified points.
expsega - An exponential segment generator operating at a-rate.
expsegr - Trace a series of exponential segments between specified points including a release segment.
ficlose - Closes a previously opened file.
filelen - Returns the length of a sound file.
filenchnls - Returns the number of channels in a sound file.
filepeak - Returns the peak absolute value of a sound file.
filesr - Returns the sample rate of a sound file.
filter2 - Performs filtering using a transposed form-II digital filter lattice with no time-varying control.
fin - Read signals from a file at a-rate.
fini - Read signals from a file at i-rate.
fink - Read signals from a file at k-rate.
fiopen - Opens a file in a specific mode.
flanger - A user controlled flanger.
flashtxt - Allows text to be displayed from instruments like sliders
FLbox - A FLTK widget that displays text inside of a box.
FLbutBank - A FLTK widget opcode that creates a bank of buttons.
FLbutton - A FLTK widget opcode that creates a button.
FLcloseButton - A FLTK widget opcode that creates a button that will close the panel window it is a part of.
FLcolor - A FLTK opcode that sets the primary colors.
FLcolor2 - A FLTK opcode that sets the secondary (selection) color.
FLcount - A FLTK widget opcode that creates a counter.
FLexecButton - A FLTK widget opcode that creates a button that executes a command.
FLgetsnap - Retrieves a previously stored FLTK snapshot.
FLgroup - A FLTK container opcode that groups child widgets.
FLgroupEnd - Marks the end of a group of FLTK child widgets.
FLgroupEnd - Marks the end of a group of FLTK child widgets.
FLhide - Hides the target FLTK widget.
FLhvsBox - Displays a box with a grid useful for visualizing two-dimensional Hyper Vectorial Synthesis.
FLhvsBoxSetValue - Sets the cursor position of a previously-declared FLhvsBox widget.
FLjoy - A FLTK opcode that acts like a joystick.
FLkeyIn - Reports keys pressed (on alphanumeric keyboard) when an FLTK panel has focus.
FLknob - A FLTK widget opcode that creates a knob.
FLlabel - A FLTK opcode that modifies the appearance of a text label.
FLloadsnap - Loads all snapshots into the memory bank of the current orchestra.
FLmouse - Returns the mouse position and the state of the three mouse buttons.
flooper - Function-table-based crossfading looper.
flooper2 - Function-table-based crossfading looper.
floor - Returns the largest integer not greater than x
FLpack - Provides the functionality of compressing and aligning FLTK widgets.
FLpackEnd - Marks the end of a group of compressed or aligned FLTK widgets.
FLpack_end - Marks the end of a group of compressed or aligned FLTK widgets.
FLpanel - Creates a window that contains FLTK widgets.
FLpanelEnd - Marks the end of a group of FLTK widgets contained inside of a window (panel).
FLpanel_end - Marks the end of a group of FLTK widgets contained inside of a window (panel).
FLprintk - A FLTK opcode that prints a k-rate value at specified intervals.
FLprintk2 - A FLTK opcode that prints a new value every time a control-rate variable changes.
FLroller - A FLTK widget that creates a transversal knob.
FLrun - Starts the FLTK widget thread.
FLsavesnap - Saves all snapshots currently created into a file.
FLscroll - A FLTK opcode that adds scroll bars to an area.
FLscrollEnd - A FLTK opcode that marks the end of an area with scrollbars.
FLscroll_end - A FLTK opcode that marks the end of an area with scrollbars.
FLsetAlign - Sets the text alignment of a label of a FLTK widget.
FLsetBox - Sets the appearance of a box surrounding a FLTK widget.
FLsetColor - Sets the primary color of a FLTK widget.
FLsetColor2 - Sets the secondary (or selection) color of a FLTK widget.
FLsetFont - Sets the font type of a FLTK widget.
FLsetPosition - Sets the position of a FLTK widget.
FLsetSize - Resizes a FLTK widget.
FLsetsnap - Stores the current status of all FLTK valuators into a snapshot location.
FLsetSnapGroup - Determines the snapshot group for FL valuators.
FLsetText - Sets the label of a FLTK widget.
FLsetTextColor - Sets the color of the text label of a FLTK widget.
FLsetTextSize - Sets the size of the text label of a FLTK widget.
FLsetTextType - Sets some font attributes of the text label of a FLTK widget.
FLsetVal_i - Sets the value of a FLTK valuator to a number provided by the user.
FLsetVal - Sets the value of a FLTK valuator at control-rate.
FLshow - Restores the visibility of a previously hidden FLTK widget.
FLslidBnk - A FLTK widget containing a bank of horizontal sliders.
FLslidBnk2 - A FLTK widget containing a bank of horizontal sliders.
FLslidBnkGetHandle - gets the handle of last slider bank created.
FLslidBnkSet - modify the values of a slider bank.
FLslidBnkSetk - modify the values of a slider bank.
FLslidBnk2Set - modify the values of a slider bank.
FLslidBnk2Setk - modify the values of a slider bank.
FLslider - Puts a slider into the corresponding FLTK container.
FLtabs - Creates a tabbed FLTK interface.
FLtabsEnd - Marks the end of a tabbed FLTK interface.
FLtabs_end - Marks the end of a tabbed FLTK interface.
FLtext - A FLTK widget opcode that creates a textbox.
FLupdate - Same as the FLrun opcode.
fluidAllOut - Collects all audio from all Fluidsynth engines in a performance
fluidCCi - Sends a MIDI controller data message to fluid.
fluidCCk - Sends a MIDI controller data message to fluid.
fluidControl - Sends MIDI note on, note off, and other messages to a SoundFont preset.
fluidEngine - Instantiates a fluidsynth engine.
fluidLoad - Loads a SoundFont into a fluidEngine, optionally listing SoundFont contents.
fluidNote - Plays a note on a channel in a fluidSynth engine.
fluidOut - Outputs sound from a given fluidEngine
fluidProgramSelect - Assigns a preset from a SoundFont to a channel on a fluidEngine.
FLvalue - Shows the current value of a FLTK valuator.
FLvkeybd - An FLTK widget opcode that creates a virtual keyboard widget.
FLvslidBnk - A FLTK widget containing a bank of horizontal sliders.
FLvslidBnk2 - A FLTK widget containing a bank of horizontal sliders.
FLxyin - Senses the mouse cursor position in a user-defined area inside an FLpanel.
fmb3 - Uses FM synthesis to create a Hammond B3 organ sound.
fmbell - Uses FM synthesis to create a tublar bell sound.
fmmetal - Uses FM synthesis to create a Heavy Metal sound.
fmpercfl - Uses FM synthesis to create a percussive flute sound.
fmrhode - Uses FM synthesis to create a Fender Rhodes electric piano sound.
fmvoice - FM Singing Voice Synthesis
fmwurlie - Uses FM synthesis to create a Wurlitzer electric piano sound.
fof - Produces sinusoid bursts useful for formant and granular synthesis.
fof2 - Produces sinusoid bursts including k-rate incremental indexing with each successive burst.
fofilter - Formant filter.
fog - Audio output is a succession of grains derived from data in a stored function table
fold - Adds artificial foldover to an audio signal.
follow - Envelope follower unit generator.
follow2 - Another controllable envelope extractor.
foscil - A basic frequency modulated oscillator.
foscili - Basic frequency modulated oscillator with linear interpolation.
fout - Outputs a-rate signals to an arbitrary number of channels.
fouti - Outputs i-rate signals of an arbitrary number of channels to a specified file.
foutir - Outputs i-rate signals from an arbitrary number of channels to a specified file.
foutk - Outputs k-rate signals of an arbitrary number of channels to a specified file, in raw (headerless) format.
fprintks - Similar to printks but prints to a file.
fprints - Similar to prints but prints to a file.
frac - Returns the fractional part of a decimal number.
freeverb - Opcode version of Jezar's Freeverb
ftchnls - Returns the number of channels in a stored function table.
ftconv - Low latency multichannel convolution, using a function table as impulse response source.
ftfree - Deletes function table.
ftgen - Generate a score function table from within the orchestra.
ftgentmp - Generate a score function table from within the orchestra, which is deleted at the end of the note.
ftlen - Returns the size of a stored function table.
ftload - Load a set of previously-allocated tables from a file.
ftloadk - Load a set of previously-allocated tables from a file.
ftlptim - Returns the loop segment start-time of a stored function table number.
ftmorf - Morphs between multiple ftables as specified in a list.
ftsave - Save a set of previously-allocated tables to a file.
ftsavek - Save a set of previously-allocated tables to a file.
ftsr - Returns the sampling-rate of a stored function table.
gain - Adjusts the amplitude audio signal according to a root-mean-square value.
gainslider - An implementation of a logarithmic gain curve which is similar to the gainslider~ object from Cycling 74 Max / MSP.
gauss - Gaussian distribution random number generator.
gbuzz - Output is a set of harmonically related cosine partials.
getcfg - Return Csound settings.
gogobel - Audio output is a tone related to the striking of a cow bell or similar.
goto - Transfer control on every pass.
grain - Generates granular synthesis textures.
grain2 - Easy-to-use granular synthesis texture generator.
grain3 - Generate granular synthesis textures with more user control.
granule - A more complex granular synthesis texture generator.
guiro - Semi-physical model of a guiro sound.
harmon - Analyze an audio input and generate harmonizing voices in synchrony.
harmon2 - Analyze an audio input and generate harmonizing voices in synchrony with formants preserved.
hilbert - A Hilbert transformer.
hrtfer - Creates 3D audio for two speakers.
hsboscil - An oscillator which takes tonality and brightness as arguments.
hvs1 - Allows one-dimensional Hyper Vectorial Synthesis (HVS) controlled by externally-updated k-variables.
hvs2 - Allows two-dimensional Hyper Vectorial Synthesis (HVS) controlled by externally-updated k-variables.
hvs3 - Allows three-dimensional Hyper Vectorial Synthesis (HVS) controlled by externally-updated k-variables.
i - Returns an init-type equivalent of a k-rate argument.
ibetarand - Deprecated.
ibexprnd - Deprecated.
icauchy - Deprecated.
ictrl14 - Deprecated.
ictrl21 - Deprecated.
ictrl7 - Deprecated.
iexprand - Deprecated.
if - Branches conditionally at initialization or during performance time.
igauss - Deprecated.
igoto - Transfer control during the i-time pass.
ihold - Creates a held note.
ilinrand - Deprecated.
imidic14 - Deprecated.
imidic21 - Deprecated.
imidic7 - Deprecated.
in - Reads mono audio data from an external device or stream.
in32 - Reads a 32-channel audio signal from an external device or stream.
inch - Reads from a numbered channel in an external audio signal or stream.
inh - Reads six-channel audio data from an external device or stream.
init - Puts the value of the i-time expression into a k- or a-rate variable.
initc14 - Initializes the controllers used to create a 14-bit MIDI value.
initc21 - Initializes the controllers used to create a 21-bit MIDI value.
initc7 - Initializes the controller used to create a 7-bit MIDI value.
ino - Reads eight-channel audio data from an external device or stream.
inq - Reads quad audio data from an external device or stream.
inrg - Allow input from a range of adjacent audio channels from the audio input device
ins - Reads stereo audio data from an external device or stream.
insremot - An opcode which can be used to implement a remote orchestra. This opcode will send note events from a source machine to one destination.
insglobal - An opcode which can be used to implement a remote orchestra. This opcode will send note events from a source machine to many destinations.
instimek - Deprecated.
instimes - Deprecated.
instr - Starts an instrument block.
int - Extracts an integer from a decimal number.
integ - Modify a signal by integration.
interp - Converts a control signal to an audio signal using linear interpolation.
invalue - Reads a k-rate signal from a user-defined channel.
inx - Reads a 16-channel audio signal from an external device or stream.
inz - Reads multi-channel audio samples into a ZAK array from an external device or stream.
ioff - Deprecated.
ion - Deprecated.
iondur - Deprecated.
iondur2 - Deprecated.
ioutat - Deprecated.
ioutc - Deprecated.
ioutc14 - Deprecated.
ioutpat - Deprecated.
ioutpb - Deprecated.
ioutpc - Deprecated.
ipcauchy - Deprecated.
ipoisson - Deprecated.
ipow - Deprecated.
is16b14 - Deprecated.
is32b14 - Deprecated.
islider16 - Deprecated.
islider32 - Deprecated.
islider64 - Deprecated.
islider8 - Deprecated.
itablecopy - Deprecated.
itablegpw - Deprecated.
itablemix - Deprecated.
itablew - Deprecated.
itrirand - Deprecated.
iunirand - Deprecated.
iweibull - Deprecated.
jitter - Generates a segmented line whose segments are randomly generated.
jitter2 - Generates a segmented line with user-controllable random segments.
jspline - A jitter-spline generator.
k - Converts a i-rate parameter to an k-rate value.
kbetarand - Deprecated.
kbexprnd - Deprecated.
kcauchy - Deprecated.
kdump - Deprecated.
kdump2 - Deprecated.
kdump3 - Deprecated.
kdump4 - Deprecated.
kexprand - Deprecated.
kfilter2 - Deprecated.
kgauss - Deprecated.
kgoto - Transfer control during the p-time passes.
klinrand - Deprecated.
kon - Deprecated.
koutat - Deprecated.
koutc - Deprecated.
koutc14 - Deprecated.
koutpat - Deprecated.
koutpb - Deprecated.
koutpc - Deprecated.
kpcauchy - Deprecated.
kpoisson - Deprecated.
kpow - Deprecated.
kr - Sets the control rate.
kread - Deprecated.
kread2 - Deprecated.
kread3 - Deprecated.
kread4 - Deprecated.
ksmps - Sets the number of samples in a control period.
ktableseg - Same as the tableseg opcode.
ktrirand - Deprecated.
kunirand - Deprecated.
kweibull - Deprecated.
lfo - A low frequency oscillator of various shapes.
limit - Sets the lower and upper limits of the value it processes.
line - Trace a straight line between specified points.
linen - Applies a straight line rise and decay pattern to an input amp signal.
linenr - The linen opcode extended with a final release segment.
lineto - Generate glissandos starting from a control signal.
linrand - Linear distribution random number generator (positive values only).
linseg - Trace a series of line segments between specified points.
linsegr - Trace a series of line segments between specified points including a release segment.
locsend - Distributes the audio signals of a previous locsig opcode.
locsig - Takes and input signal and distributes between 2 or 4 channels.
log - Returns a natural log.
log10 - Returns a base 10 log.
logbtwo - Performs a logarithmic base two calculation.
logcurve - This opcode implements a formula for generating a normalised logarithmic curve in range 0 - 1. It is based on the Max / MSP work of Eric Singer (c) 1994.
loop_ge - Looping constructions.
loop_gt - Looping constructions.
loop_le - Looping constructions.
loop_lt - Looping constructions.
loopseg - Generate control signal consisting of linear segments delimited by two or more specified points.
loopsegp - Control signals based on linear segments.
lorenz - Implements the Lorenz system of equations.
lorisread - Imports a set of bandwidth-enhanced partials from a SDIF-format data file, applying control-rate frequency, amplitude, and bandwidth scaling envelopes, and stores the modified partials in memory.
lorismorph - Morphs two stored sets of bandwidth-enhanced partials and stores a new set of partials representing the morphed sound. The morph is performed by linearly interpolating the parameter envelopes (frequency, amplitude, and bandwidth, or noisiness) of the bandwidth-enhanced partials according to control-rate frequency, amplitude, and bandwidth morphing functions.
lorisplay - renders a stored set of bandwidth-enhanced partials using the method of Bandwidth-Enhanced Additive Synthesis implemented in the Loris software, applying control-rate frequency, amplitude, and bandwidth scaling envelopes.
loscil - Read sampled sound from a table.
loscil3 - Read sampled sound from a table using cubic interpolation.
loscilx - Loop oscillator.
lowpass2 - A resonant lowpass filter.
lowres - Another resonant lowpass filter.
lowresx - Simulates layers of serially connected resonant lowpass filters.
lpf18 - A 3-pole sweepable resonant lowpass filter.
lpfreson - Resynthesises a signal from the data passed internally by a previous lpread, applying formant shifting.
lphasor - Generates a table index for sample playback
lpinterp - Computes a new set of poles from the interpolation between two analysis.
lposcil - Read sampled sound from a table with optional looping and high precision.
lposcil3 - Read sampled sound from a table with high precision and cubic interpolation.
lposcila - Read sampled sound from a table with optional looping and high precision.
lposcilsa - Read stereo sampled sound from a table with optional looping and high precision.
lposcilsa2 - Read stereo sampled sound from a table with optional looping and high precision.
lpread - Reads a control file of time-ordered information frames.
lpreson - Resynthesises a signal from the data passed internally by a previous lpread.
lpshold - Generate control signal consisting of held segments.
lpsholdp - Control signals based on held segments.
lpslot - Selects the slot to be use by further lp opcodes.
mac - Multiplies and accumulates a- and k-rate signals.
maca - Multiply and accumulate a-rate signals only.
madsr - Calculates the classical ADSR envelope using the linsegr mechanism.
mandel - Mandelbrot set
mandol - An emulation of a mandolin.
marimba - Physical model related to the striking of a wooden block.
massign - Assigns a MIDI channel number to a Csound instrument.
max - Produces a signal that is the maximum of any number of input signals.
maxabs - Produces a signal that is the maximum of the absolute values of any number of input signals.
maxabsaccum - Accumulates the maximum of the absolute values of audio signals.
maxaccum - Accumulates the maximum value of audio signals.
maxalloc - Limits the number of allocations of an instrument.
max_k - Local maximum (or minimum) value of an incoming asig signal
mclock - Sends a MIDI CLOCK message.
mdelay - A MIDI delay opcode.
metro - Trigger Metronome
midic14 - Allows a floating-point 14-bit MIDI signal scaled with a minimum and a maximum range.
midic21 - Allows a floating-point 21-bit MIDI signal scaled with a minimum and a maximum range.
midic7 - Allows a floating-point 7-bit MIDI signal scaled with a minimum and a maximum range.
midichannelaftertouch - Gets a MIDI channel's aftertouch value.
midichn - Returns the MIDI channel number from which the note was activated.
midicontrolchange - Gets a MIDI control change value.
midictrl - Get the current value (0-127) of a specified MIDI controller.
mididefault - Changes values, depending on MIDI activation.
midiin - Returns a generic MIDI message received by the MIDI IN port.
midinoteoff - Gets a MIDI noteoff value.
midinoteoncps - Gets a MIDI note number as a cycles-per-second frequency.
midinoteonkey - Gets a MIDI note number value.
midinoteonoct - Gets a MIDI note number value as octave-point-decimal value.
midinoteonpch - Gets a MIDI note number as a pitch-class value.
midion - Generates MIDI note messages at k-rate.
midion2 - Sends noteon and noteoff messages to the MIDI OUT port.
midiout - Sends a generic MIDI message to the MIDI OUT port.
midipitchbend - Gets a MIDI pitchbend value.
midipolyaftertouch - Gets a MIDI polyphonic aftertouch value.
midiprogramchange - Gets a MIDI program change value.
miditempo - Returns the current tempo at k-rate, of either the MIDI file (if available) or the score
midremot - An opcode which can be used to implement a remote midi orchestra. This opcode will send midi events from a source machine to one destination.
midglobal - An opcode which can be used to implement a remote midi orchestra. This opcode will broadcast the midi events to all the machines involved in the remote concert.
min - Produces a signal that is the minimum of any number of input signals.
minabs - Produces a signal that is the minimum of the absolute values of any number of input signals.
minabsaccum - Accumulates the minimum of the absolute values of audio signals.
minaccum - Accumulates the minimum value of audio signals.
mirror - Reflects the signal that exceeds the low and high thresholds.
MixerSetLevel - Sets the level of a send to a buss.
MixerGetLevel - Gets the level of a send to a buss.
MixerSend - Mixes an arate signal into a channel of a buss.
MixerReceive - Receives an arate signal from a channel of a buss.
MixerClear - Resets all channels of a buss to 0.
mode - A filter that simulates a mass-spring-damper system
monitor - Returns the audio spout frame.
moog - An emulation of a mini-Moog synthesizer.
moogladder - Moog ladder lowpass filter.
moogvcf - A digital emulation of the Moog diode ladder filter configuration.
moogvcf2 - A digital emulation of the Moog diode ladder filter configuration.
moscil - Sends a stream of the MIDI notes.
mpulse - Generates a set of impulses.
mrtmsg - Send system real-time messages to the MIDI OUT port.
multitap - Multitap delay line implementation.
mute - Mutes/unmutes new instances of a given instrument.
mxadsr - Calculates the classical ADSR envelope using the expsegr mechanism.
nchnls - Sets the number of channels of audio output.
nestedap - Three different nested all-pass filters.
nlfilt - A filter with a non-linear effect.
noise - A white noise generator with an IIR lowpass filter.
noteoff - Send a noteoff message to the MIDI OUT port.
noteon - Send a noteon message to the MIDI OUT port.
noteondur - Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
noteondur2 - Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
notnum - Get a note number from a MIDI event.
nreverb - A reverberator consisting of 6 parallel comb-lowpass filters.
nrpn - Sends a Non-Registered Parameter Number to the MIDI OUT port.
nsamp - Returns the number of samples loaded into a stored function table number.
nstrnum - Returns the number of a named instrument.
ntrpol - Calculates the weighted mean value of two input signals.
octave - Calculates a factor to raise/lower a frequency by a given amount of octaves.
octcps - Converts a cycles-per-second value to octave-point-decimal.
octmidi - Get the note number, in octave-point-decimal units, of the current MIDI event.
octmidib - Get the note number of the current MIDI event and modify it by the current pitch-bend value, express it in octave-point-decimal.
octpch - Converts a pitch-class value to octave-point-decimal.
opcode - Defines the start of user-defined opcode block.
OSCsend - Sends data to other processes using the OSC protocol
OSCinit - Start a listening process for OSC messages to a particular port.
OSClisten - Listen for OSC messages to a particular path.
oscbnk - Mixes the output of any number of oscillators.
oscil - A simple oscillator.
oscil1 - Accesses table values by incremental sampling.
oscil1i - Accesses table values by incremental sampling with linear interpolation.
oscil3 - A simple oscillator with cubic interpolation.
oscili - A simple oscillator with linear interpolation.
oscilikt - A linearly interpolated oscillator that allows changing the table number at k-rate.
osciliktp - A linearly interpolated oscillator that allows allows phase modulation.
oscilikts - A linearly interpolated oscillator with sync status that allows changing the table number at k-rate.
osciln - Accesses table values at a user-defined frequency.
oscils - A simple, fast sine oscillator
oscilx - Same as the osciln opcode.
out - Writes mono audio data to an external device or stream.
out32 - Writes 32-channel audio data to an external device or stream.
outc - Writes audio data with an arbitrary number of channels to an external device or stream.
outch - Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
outh - Writes 6-channel audio data to an external device or stream.
outiat - Sends MIDI aftertouch messages at i-rate.
outic - Sends MIDI controller output at i-rate.
outic14 - Sends 14-bit MIDI controller output at i-rate.
outipat - Sends polyphonic MIDI aftertouch messages at i-rate.
outipb - Sends MIDI pitch-bend messages at i-rate.
outipc - Sends MIDI program change messages at i-rate
outkat - Sends MIDI aftertouch messages at k-rate.
outkc - Sends MIDI controller messages at k-rate.
outkc14 - Sends 14-bit MIDI controller output at k-rate.
outkpat - Sends polyphonic MIDI aftertouch messages at k-rate.
outkpb - Sends MIDI pitch-bend messages at k-rate.
outkpc - Sends MIDI program change messages at k-rate.
outo - Writes 8-channel audio data to an external device or stream.
outq - Writes 4-channel audio data to an external device or stream.
outq1 - Writes samples to quad channel 1 of an external device or stream.
outq2 - Writes samples to quad channel 2 of an external device or stream.
outq3 - Writes samples to quad channel 3 of an external device or stream.
outq4 - Writes samples to quad channel 4 of an external device or stream.
outrg - Allow output to a range of adjacent audio channels on the audio input device
outs - Writes stereo audio data to an external device or stream.
outs1 - Writes samples to stereo channel 1 of an external device or stream.
outs2 - Writes samples to stereo channel 2 of an external device or stream.
outvalue - Sends a k-rate signal or string to a user-defined channel.
outx - Writes 16-channel audio data to an external device or stream.
outz - Writes multi-channel audio data from a ZAK array to an external device or stream.
p - Show the value in a given p-field.
pan - Distribute an audio signal amongst four channels.
pareq - Implementation of Zoelzer's parametric equalizer filters.
partials - Partial track spectral analysis.
partikkel - Granular synthesizer with "per grain" control over many of its parameters. Has a sync input to sychronize its internal grain scheduler clock to an external clock source.
partikkelsync - Outputs partikkel's grain scheduler clock pulse and phase to synchronize several instances of the partikkel opcode to the same clock source.
pcauchy - Cauchy distribution random number generator (positive values only).
pchbend - Get the current pitch-bend value for this channel.
pchmidi - Get the note number of the current MIDI event, expressed in pitch-class units.
pchmidib - Get the note number of the current MIDI event and modify it by the current pitch-bend value, express it in pitch-class units.
pchoct - Converts an octave-point-decimal value to pitch-class.
pconvolve - Convolution based on a uniformly partitioned overlap-save algorithm
pcount - Returns the number of pfields belonging to a note event.
peak - Maintains the output equal to the highest absolute value received.
peakk - Deprecated.
pgmassign - Assigns an instrument number to a specified MIDI program.
phaser1 - First-order allpass filters arranged in a series.
phaser2 - Second-order allpass filters arranged in a series.
phasor - Produce a normalized moving phase value.
phasorbnk - Produce an arbitrary number of normalized moving phase values.
pindex - Returns the value of a specified pfield.
pinkish - Generates approximate pink noise.
pitch - Tracks the pitch of a signal.
pitchamdf - Follows the pitch of a signal based on the AMDF method.
planet - Simulates a planet orbiting in a binary star system.
pluck - Produces a naturally decaying plucked string or drum sound.
poisson - Poisson distribution random number generator (positive values only).
polyaft - Returns the polyphonic after-touch pressure of the selected note number.
pop - Pops values from the global stack.
pop_f - Pops an f-sig frame from the global stack.
port - Applies portamento to a step-valued control signal.
portk - Applies portamento to a step-valued control signal.
poscil - High precision oscillator.
poscil3 - High precision oscillator with cubic interpolation.
pow - Computes one argument to the power of another argument.
powoftwo - Performs a power-of-two calculation.
prealloc - Creates space for instruments but does not run them.
prepiano - Creates a tone similar to a piano string prepared in a Cageian fashion.
print - Displays the values init (i-rate) variables.
printf - printf-style formatted output
printk - Prints one k-rate value at specified intervals.
printk2 - Prints a new value every time a control variable changes.
printks - Prints at k-rate using a printf() style syntax.
prints - Prints at init-time using a printf() style syntax.
product - Multiplies any number of a-rate signals.
pset - Defines and initializes numeric arrays at orchestra load time.
ptrack - Tracks the pitch of a signal.
puts - Print a string constant or variable
push - Pushes a value into the global stack.
push_f - Pushes an f-sig frame into the global stack.
pvadd - Reads from a pvoc file and uses the data to perform additive synthesis.
pvbufread - Reads from a phase vocoder analysis file and makes the retrieved data available.
pvcross - Applie