[Csnd] Problems with pitch in sndwarpst
| Date | 2023-01-07 00:28 |
| From | Scott Daughtrey |
| Subject | [Csnd] Problems with pitch in sndwarpst |
I've been tinkering with sndwarpst. I'm finding that with the resample value set at 1 it's not playing samples at the original pitch as one would assume (given the manual suggests 2 would raise the pitch one octave). I've tried numerous long, pitched samples with the same result. In all cases the pitch appears to be approx. 1 tone higher than the original. I'm using Csound for Android which uses Csound 6.16. Here's an example code. I've also posted the csd and example wave file (see links below). Any help or suggestions, or perhaps if anyone has time to confirm the issue by testing this regardless of OS or version, would be appreciated. It may be required to restart the file if the initial sound isn't a solid tone but more of a filtered noise like timbre. https://www.dropbox.com/s/9035of0m1fupsym/sndwarpst_harp1.csd?dl=0 https://www.dropbox.com/s/ug3rsbcy6ixkww4/HarpC1shrt.wav?dl=0 |
| Date | 2023-01-07 00:46 |
| From | Iain McCurdy |
| Subject | Re: [Csnd] Problems with pitch in sndwarpst |
|
Hi Scott,
I think it could be a sample rate mismatch. Your sound file is 44100 Hz
but you have sr = 48000 in the csd. It plays the correct pitch for me when corrected.
Regards,
Iain
From: A discussion list for users of Csound <CSOUND@LISTSERV.HEANET.IE> on behalf of Scott Daughtrey <stunes6556@GMAIL.COM>
Sent: 07 January 2023 00:28 To: CSOUND@LISTSERV.HEANET.IE <CSOUND@LISTSERV.HEANET.IE> Subject: [Csnd] Problems with pitch in sndwarpst I've been tinkering with sndwarpst. I'm finding that with the resample value set at 1 it's not playing samples at the original pitch as one would assume (given the manual suggests 2 would raise the pitch one octave).
I've tried numerous long, pitched samples with the same result. In all cases the pitch appears to be approx. 1 tone higher than the original. I'm using Csound for Android which uses Csound 6.16. Here's an example code. I've also posted the csd and example wave file (see links below). Any help or suggestions, or perhaps if anyone has time to confirm the issue by testing this regardless of OS or version, would be appreciated. It may be required to restart the file if the initial sound isn't a solid tone but more of a filtered noise like timbre. https://www.dropbox.com/s/9035of0m1fupsym/sndwarpst_harp1.csd?dl=0 https://www.dropbox.com/s/ug3rsbcy6ixkww4/HarpC1shrt.wav?dl=0 <CsoundSynthesizer> <CsOptions> -odac </CsOptions> <CsInstruments> sr = 48000 ksmps = 32 nchnls = 2 0dbfs = 1 gSfile = "HarpC1shrt.wav" ; waveform used for granulation giSound ftgen 1,0,0,1,gSfile,0,0,0 ; window function - used as an amplitude envelope for each grain giWFn ftgen 2,0,16384,9,0.5,1,0 seed 0 gaSendL init 0 ; initialize global audio variables gaSendR init 0 instr Trigger ; triggers instrument 2 ktrigger metro 1/8.5 kRand = trandom(ktrigger,10,16) schedkwhen ktrigger,0,0,"Granular",0,kRand ;trigger instr. 2 endin instr Granular ; generates granular synthesis textures ifn1 = giSound ilen = nsamp(ifn1)/sr iPtrStart = random(1,ilen-1) iPtrTrav = random(-1,1) ktimewarp = line(iPtrStart,p3,iPtrStart+iPtrTrav) kamp = linsegr(0,2,0.1,p3-4,0.1, 4, 0) iresample = 1 ifn2 = giWFn ibeg = 0 iwsize = random(400,10000) irandw = iwsize/3 ioverlap = 14 itimemode = .2 ; default 1 ; create a stereo granular synthesis texture using sndwarp aSigL,aSigR sndwarpst kamp*.6,ktimewarp,iresample,ifn1,ibeg,\ iwsize,irandw,ioverlap,ifn2,itimemode gaSendL += aSigL*0.48 gaSendR += aSigR*0.6 outs aSigL*.8,aSigR endin instr Reverb aRvbL,aRvbR reverbsc gaSendL,gaSendR,0.92,12000 outs aRvbL,aRvbR clear gaSendL,gaSendR endin instr Record ;read the stereo csound output buffer allL, allR monitor ; write the output of csound to an audio file ; wav file: 16 bits with header fout "/sdcard/sndwarpst18.wav", 16, allL, allR endin </CsInstruments> <CsScore> ; p1 p2 p3 i"Trigger" 0 30 ; triggers instr 2 i"Reverb" 0 50 ; reverb instrument ; i Record 0 51 ; record instrument </CsScore> </CsoundSynthesizer> ; original example written by Iain McCurdy Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here |