[Csnd] pvsftw problems

Date	2011-01-16 23:42
From	joachim heintz
Subject	[Csnd] pvsftw problems
	hi - i have problems using the pvsftw opcode. basically, it seems to return kflag=1 even if writing to the table has not been completed. below is an example which tries to isolate the problem. writing the fsig to a function table is just done in one k-period. kflag returns 1, but there are obviously no data in the function table. these are my questions: 1) is the kflag return value wrong or am i doing something wrong? 2) how many k-cycles are needed to write a fsig properly to a table via pvsftw? (the manual says: if ksmps=overlap, it can be done in one k-cycle. but in my tests this does not work.) 3) is there a trick to do it in one k-cycle via a k-rate loop? i tried this, but without success. thanks - joachim sr = 44100 ksmps = 128 nchnls = 1 0dbfs = 1 giSine ftgen 0, 0, 2^12, 10, 1 giAmpTab ftgen 0, 0, 513, -2, 0 opcode TableDumpSimp_k, 0, ijo ;prints the content of a table in a simple way ifn, iprec, ippr xin; function table, float precision while printing (default = 3), parameters per row (default = 10, maximum = 32) iprec = (iprec == -1 ? 3 : iprec) ippr = (ippr == 0 ? 10 : ippr) iend = ftlen(ifn) kndx = 0 Sformat sprintf "%%.%df\t", iprec Sdump = "" loop: kval tab kndx, ifn Snew sprintfk Sformat, kval Sdump strcatk Sdump, Snew kndx = kndx + 1 kmod = kndx % ippr if kmod == 0 then puts Sdump, kndx Sdump sprintfk "%s", "" endif if kndx < iend kgoto loop puts Sdump, kndx endop instr 1 abuzz buzz 1, 200, 50, giSine ktrig metro 1, .5 if ktrig == 1 then fsig pvsanal abuzz, 1024, 256, 2048, 1 kflag pvsftw fsig, giAmpTab printk 0, kflag TableDumpSimp_k giAmpTab endif endin i 1 0 1 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	2011-01-17 10:46
From	joachim heintz
Subject	[Csnd] Re: pvsftw problems
Attachments	pvsftw.csd
	sorry the text of the csd has been corrupted because of the email. it's attached now. thanks for any suggestions - joachim Am 17.01.2011 00:42, schrieb joachim heintz: > hi - > > i have problems using the pvsftw opcode. basically, it seems to return > kflag=1 even if writing to the table has not been completed. below is an > example which tries to isolate the problem. writing the fsig to a > function table is just done in one k-period. kflag returns 1, but there > are obviously no data in the function table. > > these are my questions: > > 1) is the kflag return value wrong or am i doing something wrong? > 2) how many k-cycles are needed to write a fsig properly to a table via > pvsftw? (the manual says: if ksmps=overlap, it can be done in one > k-cycle. but in my tests this does not work.) > 3) is there a trick to do it in one k-cycle via a k-rate loop? i tried > this, but without success. > > thanks - > > joachim > > > > > > > sr = 44100 > ksmps = 128 > nchnls = 1 > 0dbfs = 1 > > giSine ftgen 0, 0, 2^12, 10, 1 > giAmpTab ftgen 0, 0, 513, -2, 0 > > opcode TableDumpSimp_k, 0, ijo > ;prints the content of a table in a simple way > ifn, iprec, ippr xin; function table, float precision while printing > (default = 3), parameters per row (default = 10, maximum = 32) > iprec = (iprec == -1 ? 3 : iprec) > ippr = (ippr == 0 ? 10 : ippr) > iend = ftlen(ifn) > kndx = 0 > Sformat sprintf "%%.%df\t", iprec > Sdump = "" > loop: > kval tab kndx, ifn > Snew sprintfk Sformat, kval > Sdump strcatk Sdump, Snew > kndx = kndx + 1 > kmod = kndx % ippr > if kmod == 0 then > puts Sdump, kndx > Sdump sprintfk "%s", "" > endif > if kndx < iend kgoto loop > puts Sdump, kndx > endop > > instr 1 > abuzz buzz 1, 200, 50, giSine > ktrig metro 1, .5 > if ktrig == 1 then > fsig pvsanal abuzz, 1024, 256, 2048, 1 > kflag pvsftw fsig, giAmpTab > printk 0, kflag > TableDumpSimp_k giAmpTab > endif > endin > > > > i 1 0 1 > > > > > 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	2011-01-17 11:08
From	peiman khosravi
Subject	[Csnd] Re: Re: pvsftw problems
	Hi joachim, Try this one (instrument pasted below). I think what is happening in your instrument is that the fsig is actually initialized at the start of the note but it contains only zeros as it is basically empty. Since you are placing pvsanal after the conditional statement by the time ktrig is one there has not been enough time to analyse the signal yet so you still get zero (as the signal is only passed onto pvsanal when ktrig==1). So pvsanal should be placed before the conditional. instr 1 abuzz buzz 1, 200, 50, giSine fsig pvsanal abuzz, 1024, 256, 2048, 1 ktrig metro 1, .5 if ktrig == 1 then kflag pvsftw fsig, giAmpTab if kflag == 1 then TableDumpSimp_k giAmpTab endif endif printk2 kflag endin On 17 January 2011 10:46, joachim heintz wrote: > sorry the text of the csd has been corrupted because of the email. it's > attached now. thanks for any suggestions - > joachim > > > > Am 17.01.2011 00:42, schrieb joachim heintz: >> hi - >> >> i have problems using the pvsftw opcode. basically, it seems to return >> kflag=1 even if writing to the table has not been completed. below is an >> example which tries to isolate the problem. writing the fsig to a >> function table is just done in one k-period. kflag returns 1, but there >> are obviously no data in the function table. >> >> these are my questions: >> >> 1) is the kflag return value wrong or am i doing something wrong? >> 2) how many k-cycles are needed to write a fsig properly to a table via >> pvsftw? (the manual says: if ksmps=overlap, it can be done in one >> k-cycle. but in my tests this does not work.) >> 3) is there a trick to do it in one k-cycle via a k-rate loop? i tried >> this, but without success. >> >> thanks - >> >> joachim >> >> >> >> >> >> >> sr = 44100 >> ksmps = 128 >> nchnls = 1 >> 0dbfs = 1 >> >> giSine ftgen 0, 0, 2^12, 10, 1 >> giAmpTab ftgen 0, 0, 513, -2, 0 >> >> opcode TableDumpSimp_k, 0, ijo >> ;prints the content of a table in a simple way >> ifn, iprec, ippr xin; function table, float precision while printing >> (default = 3), parameters per row (default = 10, maximum = 32) >> iprec = (iprec == -1 ? 3 : iprec) >> ippr = (ippr == 0 ? 10 : ippr) >> iend = ftlen(ifn) >> kndx = 0 >> Sformat sprintf "%%.%df\t", iprec >> Sdump = "" >> loop: >> kval tab kndx, ifn >> Snew sprintfk Sformat, kval >> Sdump strcatk Sdump, Snew >> kndx = kndx + 1 >> kmod = kndx % ippr >> if kmod == 0 then >> puts Sdump, kndx >> Sdump sprintfk "%s", "" >> endif >> if kndx < iend kgoto loop >> puts Sdump, kndx >> endop >> >> instr 1 >> abuzz buzz 1, 200, 50, giSine >> ktrig metro 1, .5 >> if ktrig == 1 then >> fsig pvsanal abuzz, 1024, 256, 2048, 1 >> kflag pvsftw fsig, giAmpTab >> printk 0, kflag >> TableDumpSimp_k giAmpTab >> endif >> endin >> >> >> >> i 1 0 1 >> >> >> >> >> 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" > > 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	2011-01-17 12:35
From	joachim heintz
Subject	[Csnd] Re: Re: Re: pvsftw problems
	thanks, peiman - this makes sense and is at least a workaround for my situation. my problem is that i want to analyze the audio input not continously, but just for some snapshots. so it would be much more efficient to write an f-signal just for some k-cycles. can anyone say 1) how many k-cycles are needed to create an fsig via pvsanal and pvstanal (fftsize/ksmps?) 2) how many k-cycles are needed to write this fsig to a table via pvsftw? thanks - joachim Am 17.01.2011 12:08, schrieb peiman khosravi: > Hi joachim, > > Try this one (instrument pasted below). > > I think what is happening in your instrument is that the fsig is > actually initialized at the start of the note but it contains only > zeros as it is basically empty. Since you are placing pvsanal after > the conditional statement by the time ktrig is one there has not been > enough time to analyse the signal yet so you still get zero (as the > signal is only passed onto pvsanal when ktrig==1). So pvsanal should > be placed before the conditional. > > > > instr 1 > abuzz buzz 1, 200, 50, giSine > fsig pvsanal abuzz, 1024, 256, 2048, 1 > > > ktrig metro 1, .5 > if ktrig == 1 then > kflag pvsftw fsig, giAmpTab > if kflag == 1 then > TableDumpSimp_k giAmpTab > endif > endif > > printk2 kflag > > > endin > > > On 17 January 2011 10:46, joachim heintz wrote: >> sorry the text of the csd has been corrupted because of the email. it's >> attached now. thanks for any suggestions - >> joachim >> >> >> >> Am 17.01.2011 00:42, schrieb joachim heintz: >>> hi - >>> >>> i have problems using the pvsftw opcode. basically, it seems to return >>> kflag=1 even if writing to the table has not been completed. below is an >>> example which tries to isolate the problem. writing the fsig to a >>> function table is just done in one k-period. kflag returns 1, but there >>> are obviously no data in the function table. >>> >>> these are my questions: >>> >>> 1) is the kflag return value wrong or am i doing something wrong? >>> 2) how many k-cycles are needed to write a fsig properly to a table via >>> pvsftw? (the manual says: if ksmps=overlap, it can be done in one >>> k-cycle. but in my tests this does not work.) >>> 3) is there a trick to do it in one k-cycle via a k-rate loop? i tried >>> this, but without success. >>> >>> thanks - >>> >>> joachim >>> >>> >>> >>> >>> >>> >>> sr = 44100 >>> ksmps = 128 >>> nchnls = 1 >>> 0dbfs = 1 >>> >>> giSine ftgen 0, 0, 2^12, 10, 1 >>> giAmpTab ftgen 0, 0, 513, -2, 0 >>> >>> opcode TableDumpSimp_k, 0, ijo >>> ;prints the content of a table in a simple way >>> ifn, iprec, ippr xin; function table, float precision while printing >>> (default = 3), parameters per row (default = 10, maximum = 32) >>> iprec = (iprec == -1 ? 3 : iprec) >>> ippr = (ippr == 0 ? 10 : ippr) >>> iend = ftlen(ifn) >>> kndx = 0 >>> Sformat sprintf "%%.%df\t", iprec >>> Sdump = "" >>> loop: >>> kval tab kndx, ifn >>> Snew sprintfk Sformat, kval >>> Sdump strcatk Sdump, Snew >>> kndx = kndx + 1 >>> kmod = kndx % ippr >>> if kmod == 0 then >>> puts Sdump, kndx >>> Sdump sprintfk "%s", "" >>> endif >>> if kndx < iend kgoto loop >>> puts Sdump, kndx >>> endop >>> >>> instr 1 >>> abuzz buzz 1, 200, 50, giSine >>> ktrig metro 1, .5 >>> if ktrig == 1 then >>> fsig pvsanal abuzz, 1024, 256, 2048, 1 >>> kflag pvsftw fsig, giAmpTab >>> printk 0, kflag >>> TableDumpSimp_k giAmpTab >>> endif >>> endin >>> >>> >>> >>> i 1 0 1 >>> >>> >>> >>> >>> 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" >> >> > > > 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"