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<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o pvsbuffer.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Required settings for WebAudio: sr = 48000 ksmps = 128 nchnls = 2 nchnls_i = 1 ; sr = 44100 ; ksmps = 32 ; nchnls = 2 0dbfs = 1 ;; example written by joachim heintz 2009 ; additions by Menno Knevel 2021 opcode FileToPvsBuf, iik, Siiiii ;;writes an audio file at the first k-cycle to a fft-buffer (via pvsbuffer) Sfile, ifftsize, ioverlap, iwinsize, iwinshape, ilength xin ktimek timeinstk if ktimek == 1 then ilen filelen Sfile kcycles = ilen * kr; number of k-cycles to write the fft-buffer kcount init 0 loop: ain soundin Sfile fftin pvsanal ain, ifftsize, ioverlap, iwinsize, iwinshape ibufln = (ilen * ilength) + (ifftsize / sr) ibuf, ktim pvsbuffer fftin, ibufln loop_lt kcount, 1, kcycles, loop xout ibuf, ilen, ktim endif endop instr 1 ifftsize = 1024 ioverlap = ifftsize / 4 iwinsize = ifftsize iwinshape = 1; von-Hann window ilength = p4 ibuffer, ilen, k0 FileToPvsBuf "fox.wav", ifftsize, ioverlap, iwinsize, iwinshape, ilength ktmpnt linseg ilen, p3, 0; reads the buffer backwards in p3 seconds fread pvsbufread ktmpnt, ibuffer aout pvsynth fread outs aout, aout endin </CsInstruments> <CsScore> i 1 0 5 .05 ; buffer a small portion i 1 6 5 .5 ; half of total length i 1 12 5 1 ; buffer total length e </CsScore> </CsoundSynthesizer>