ECMC PVC example file plainpv3

ECMC pvc example "plainpv3," which illustrates use of the warp index feature of plainpv, actually is a mix of three soundfiles, each with one tone, played in succession:

(1) /sflib/africa/logdrum1.c3 ( the original source soundfile) (2) a resynthesis of this logdrum tone created with pvc example "plainpv3-1" (3) a resynthesis of this logdrum tone created with pvc example "plainpv3-2"

In "plainpv3-1", which created the second note, all default analysis and resynthesis values are used except:

spectrum_warpshape_index=6 # int, float or FUNC
and
gain_in_decibels=4 # in dB, int, float or FUNC

The high warp index value of 6 causes weaker intensity frequency components within the logdrum tone to be attenuated or eliminated, so that the resynthesis timbre is "simpler" and "less bright." This elimination or attenuation of most of the frequencies within the source sound also results in decreased output amplitude. We have compensated for this -- restoring the amplitude toapproximately its original level - by raising the output gain by 4 dB. To see the full script file used to create the second note in example "plainpv3," type:

getpvcex plainpv3-1 or else pvcex plainpv3-1
In "plainpv3-2", which created the third note, all default analysis values were used except:
spectrum_warpshape_index=-20 # int, float or FUNC
and
gain_in_decibels=-18 # in dB, int, float or FUNC
The very high negative warp index value of -20 causes weaker intensity frequency components within the logdrum tone to be boosted, so that the resynthesis timbre is "brighter." The increased ampltude of many of the frequencies within the source sound would result in clipping. TO avoid this, we reduced the output gain by 18 dB. To see the full script file used to create the third note in example "plainpv3," type:
getpvcex plainpv3-2 or else pvcex plainpv3-2