trmix — Streaming partial track mixing.
The trmix opcode takes two inputs containg TRACKS pv streaming signals (as generated, for instance by partials) and mixes them into a single TRACKS stream. Tracks will be mixed up to the available space (defined by the original number of FFT bins in the analysed signals). If the sum of the input tracks exceeds this space, the higher-ordered tracks in the second input will be pruned.
fsig -- output pv stream in TRACKS format
fin1 -- first input pv stream in TRACKS format.
fin2 -- second input pv stream in TRACKS format
Here is an example of the trmix opcode. It uses the file trmix.csd.
Example 952. Example of the trmix opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o trmix.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ain diskin2 "fox.wav", 1 fs1,fsi2 pvsifd ain, 2048, 512, 1 ; ifd analysis fst partials fs1, fsi2, .003, 1, 3, 500 ; partial tracking fslo,fshi trsplit fst, 1000 ; split partial tracks at 1000 Hz fscl trscale fshi, 1.3 ; shift the upper tracks fmix trmix fslo,fscl ; mix the shifted and unshifted tracks aout tradsyn fmix, 1, 1, 500, 1 ; resynthesis of tracks outs aout, aout endin </CsInstruments> <CsScore> f1 0 8192 10 1 ;sine wave i 1 0 3 e </CsScore> </CsoundSynthesizer>
The example above shows partial tracking of an ifd-analysis signal, frequency splitting and pitch shifting of the upper part of the spectrum, followed by the remix of the two parts of the spectrum and resynthesis.