[Csnd] doppler shift options

[Csnd] doppler shift options

Date	2011-11-12 17:06
From	Andrew Lyons
Subject	[Csnd] doppler shift options
	Hi, I'm resurrecting an old system for sound spatialisation after a 10 year rest, and I wanted to quickly survey if there are any new approaches to doppler pitch shifting in Csound besides the pvanal/pvoc approach I used originally. Some requirements: 1./ Ideally I can pitch shift in a single pass - rather than a two stage process. I'd like to pass a pitch control k-rate channel and a sound source, and get a doppler shifted sound back. 2./ The system can't alter the length (time domain) of the audio. Are there any new ways to do this kind of thing? Thanks! Cheers -- ======================================= Andrew D Lyons \| Digital Artist \| http://www.tstex.com =======================================

Date	2011-11-12 18:01
From	Victor Lazzarini
Subject	Re: [Csnd] doppler shift options
	The first solution would be to pitch shift using pvsanal + pvscale + pvsynth, if you want to get any input signal. Another alternative, is to use a time-domain pitchshifter with delay lines. If you are reading from file, pvstanal, temposcal and mincer could also do the job. Victor On 12 Nov 2011, at 17:06, Andrew Lyons wrote: Hi, I'm resurrecting an old system for sound spatialisation after a 10 year rest, and I wanted to quickly survey if there are any new approaches to doppler pitch shifting in Csound besides the pvanal/pvoc approach I used originally. Some requirements: 1./ Ideally I can pitch shift in a single pass - rather than a two stage process. I'd like to pass a pitch control k-rate channel and a sound source, and get a doppler shifted sound back. 2./ The system can't alter the length (time domain) of the audio. Are there any new ways to do this kind of thing? Thanks! Cheers -- ======================================= Andrew D Lyons \| Digital Artist \| http://www.tstex.com ======================================= Dr Victor Lazzarini Senior Lecturer Dept. of Music NUI Maynooth Ireland tel.: +353 1 708 3545 Victor dot Lazzarini AT nuim dot ie

Date	2011-11-12 18:12
From	Victor Lazzarini
Subject	Re: [Csnd] doppler shift options
	By the way, if you're wondering about the delay pitchshifter: http://www.csounds.com/udo/displayOpcode.php?opcode_id=157 On 12 Nov 2011, at 18:01, Victor Lazzarini wrote: The first solution would be to pitch shift using pvsanal + pvscale + pvsynth, if you want to get any input signal. Another alternative, is to use a time-domain pitchshifter with delay lines. If you are reading from file, pvstanal, temposcal and mincer could also do the job. Victor On 12 Nov 2011, at 17:06, Andrew Lyons wrote: Hi, I'm resurrecting an old system for sound spatialisation after a 10 year rest, and I wanted to quickly survey if there are any new approaches to doppler pitch shifting in Csound besides the pvanal/pvoc approach I used originally. Some requirements: 1./ Ideally I can pitch shift in a single pass - rather than a two stage process. I'd like to pass a pitch control k-rate channel and a sound source, and get a doppler shifted sound back. 2./ The system can't alter the length (time domain) of the audio. Are there any new ways to do this kind of thing? Thanks! Cheers -- ======================================= Andrew D Lyons \| Digital Artist \| http://www.tstex.com ======================================= Dr Victor Lazzarini Senior Lecturer Dept. of Music NUI Maynooth Ireland tel.: +353 1 708 3545 Victor dot Lazzarini AT nuim dot ie Dr Victor Lazzarini Senior Lecturer Dept. of Music NUI Maynooth Ireland tel.: +353 1 708 3545 Victor dot Lazzarini AT nuim dot ie

Date	2011-11-12 21:32
From	joachim heintz
Subject	Re: [Csnd] doppler shift options
	have you tried the doppler opcode? i haven't used it yet; i just know it's there. perhaps it fits for your requirements. best - joachim Am 12.11.2011 18:06, schrieb Andrew Lyons: > Hi, > > I'm resurrecting an old system for sound spatialisation after a 10 year > rest, and I wanted to quickly survey if there are any new approaches to > doppler pitch shifting in Csound besides the pvanal/pvoc approach I used > originally. Some requirements: > > 1./ Ideally I can pitch shift in a single pass - rather than a two stage > process. I'd like to pass a pitch control k-rate channel and a sound > source, and get a doppler shifted sound back. > > 2./ The system can't alter the length (time domain) of the audio. > > Are there any new ways to do this kind of thing? Thanks! > > Cheers > > -- > ======================================= > Andrew D Lyons \| Digital Artist \| http://www.tstex.com > ======================================= Send bugs reports to the Sourceforge bug tracker https://sourceforge.net/tracker/?group_id=81968&atid=564599 Discussions of bugs and features can be posted here To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"

Date	2011-11-13 10:14
From	menno
Subject	Re: [Csnd] doppler shift options
	There is also the space/spdist combination. And in the manual there is an example that uses the doppler effect: http://www.csounds.com/manual/html/spdist.html but, Menno -------------My music----------------- http://www.jamendo.com/de/album/6789/ http://www.jamendo.com/en/album/7428/ -------------My work----------------- http://members.home.nl/mag.knevel/ --- On Sat, 11/12/11, joachim heintz wrote: > From: joachim heintz > Subject: Re: [Csnd] doppler shift options > To: csound@lists.bath.ac.uk > Date: Saturday, November 12, 2011, 10:32 PM > have you tried the doppler opcode? > i haven't used it yet; i just know it's there. perhaps it > fits for your > requirements. > best - > joachim > > > Am 12.11.2011 18:06, schrieb Andrew Lyons: > > Hi, > > > > I'm resurrecting an old system for sound > spatialisation after a 10 year > > rest, and I wanted to quickly survey if there are any > new approaches to > > doppler pitch shifting in Csound besides the > pvanal/pvoc approach I used > > originally. Some requirements: > > > > 1./ Ideally I can pitch shift in a single pass - > rather than a two stage > > process. I'd like to pass a pitch control k-rate > channel and a sound > > source, and get a doppler shifted sound back. > > > > 2./ The system can't alter the length (time domain) of > the audio. > > > > Are there any new ways to do this kind of thing? > Thanks! > > > > Cheers > > > > -- > > ======================================= > > Andrew D Lyons \| Digital Artist \| http://www.tstex.com > > ======================================= > > > Send bugs reports to the Sourceforge bug tracker > https://sourceforge.net/tracker/?group_id=81968&atid=564599 > Discussions of bugs and features can be posted here > To unsubscribe, send email sympa@lists.bath.ac.uk > with body "unsubscribe csound" > > Send bugs reports to the Sourceforge bug tracker https://sourceforge.net/tracker/?group_id=81968&atid=564599 Discussions of bugs and features can be posted here To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"

Date	2011-11-13 11:22
From	Victor Lazzarini
Subject	Re: [Csnd] doppler shift options
	I also have these two UDOs that might be handy. They calculate doppler and also amp w.r.t. distance. ===== /* inputs are sig, abs distance, speed of sound / opcode Doppler,a,aai asource,adist,ic xin adist tone adist, 10 ; smooth changes in direction adel = adist/ic adump delayr 1 ; max delay adopp deltap3 adel ; var delay delayw asource ; delay input amin init 1 ; min dist 1 m adist max adist, amin ampfac = 1/adist xout adoppampfac endop /* inputs are sig, distance (0 > left, 0 < right), speed of sound, max absolute distance / opcode StereoDoppler,aa,aaii asource,apos,ic,imax xin asig Doppler asource,abs(apos),ic apan = apos/imax ap1 = (sqrt(2)/2)(1-apan/sqrt(1+(apanapan))) ap2 = (sqrt(2)/2)(1+apan/sqrt(1+(apanapan))) xout asigap1, asig*ap2 endop ==== example: instr 1 ipos1 = p4 ipos2 = p5 ic = 344 ; speed of sound kenv linen 0.5, .1, p3, .1 ; source sound envelope asource buzz kenv, p6, 20, 1 ; source sound generator apos linseg ipos1, p3, ipos2 ; moving the source imax1 = abs(ipos1) imax2 = abs(ipos2) a1,a2 StereoDoppler asource,apos,ic,(imax1 > imax2 ? imax1 : imax2) outs a1, a2 endin On 13 Nov 2011, at 10:14, menno wrote: > There is also the space/spdist combination. And in the manual there > is an example that uses the doppler effect: http://www.csounds.com/manual/html/spdist.html > > but, > Menno > > -------------My music----------------- > http://www.jamendo.com/de/album/6789/ > http://www.jamendo.com/en/album/7428/ > -------------My work----------------- > http://members.home.nl/mag.knevel/ > > > --- On Sat, 11/12/11, joachim heintz wrote: > >> From: joachim heintz >> Subject: Re: [Csnd] doppler shift options >> To: csound@lists.bath.ac.uk >> Date: Saturday, November 12, 2011, 10:32 PM >> have you tried the doppler opcode? >> i haven't used it yet; i just know it's there. perhaps it >> fits for your >> requirements. >> best - >> joachim >> >> >> Am 12.11.2011 18:06, schrieb Andrew Lyons: >>> Hi, >>> >>> I'm resurrecting an old system for sound >> spatialisation after a 10 year >>> rest, and I wanted to quickly survey if there are any >> new approaches to >>> doppler pitch shifting in Csound besides the >> pvanal/pvoc approach I used >>> originally. Some requirements: >>> >>> 1./ Ideally I can pitch shift in a single pass - >> rather than a two stage >>> process. I'd like to pass a pitch control k-rate >> channel and a sound >>> source, and get a doppler shifted sound back. >>> >>> 2./ The system can't alter the length (time domain) of >> the audio. >>> >>> Are there any new ways to do this kind of thing? >> Thanks! >>> >>> Cheers >>> >>> -- >>> ======================================= >>> Andrew D Lyons \| Digital Artist \| http://www.tstex.com >>> ======================================= >> >> >> Send bugs reports to the Sourceforge bug tracker >> https://sourceforge.net/tracker/?group_id=81968&atid=564599 >> Discussions of bugs and features can be posted here >> To unsubscribe, send email sympa@lists.bath.ac.uk >> with body "unsubscribe csound" >> >> > > > Send bugs reports to the Sourceforge bug tracker > https://sourceforge.net/tracker/?group_id=81968&atid=564599 > Discussions of bugs and features can be posted here > To unsubscribe, send email sympa@lists.bath.ac.uk with body > "unsubscribe csound" > Dr Victor Lazzarini Senior Lecturer Dept. of Music NUI Maynooth Ireland tel.: +353 1 708 3545 Victor dot Lazzarini AT nuim dot ie Send bugs reports to the Sourceforge bug tracker https://sourceforge.net/tracker/?group_id=81968&atid=564599 Discussions of bugs and features can be posted here To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"