Time-varying pitch transposition.
in RTcmix/insts/std
TRANSBEND(outsk, insk, dur, amp, pitchenvgenno[, inputchan, pan])
| Param Field | Parameter | Units | Dynamic | Optional | Notes |
|---|---|---|---|---|---|
| p0 | output start time | seconds | no | no | |
| p1 | input start time | seconds | no | no | |
| p2 | output duration | or endtime if negative | no | no | seconds |
| p3 | amplitude multiplier | relative multiplier of input signal | no | no | |
| p4 | function table number for pitch transposition control envelope | - | no | no | |
| p5 | input channel | - | no | yes | default: 0 |
| p6 | pan | 0-1 stereo; 0.5 is middle | no | yes | default: 0 |
This instrument assumes function table 1 is the amplitude envelope.
This instrument has not been updated for pfield control; see the usage notes below.
Author: Doug Scott 9/3/2000
TRANSBEND performs a time-varying transposition on an input signal using cubic spline interpolation. This is essentially the same thing as TRANS, except that you can change the transposition factor dynamically using the older makegen control envelope sysystem.
Because of the new pfield-enabled control envelope system, TRANSBEND has now been largely superceded by the TRANS and TRANS3 instruments. The paramters of TRANSBEND are the same as with these instruments. See the TRANS Usage Notes for more information.
very basic:
rtsetparams(44100, 2)
load("TRANSBEND")
rtinput("mysound.snd")
dur = DUR(0)
amp = 1
pan = 0.5
/* amplitude curve */
setline(0,0, 1, 1, 90, 1, 100, 0)
/* transpose from 4 semitones up to 8 down - stored in gen slot 2 */
makegen(-2, 18, 512, 1,.04, 512,-.08)
TRANSBEND(0, 0, dur, amp, 2, 0, pan)