[Csnd] is this a bug? gen 20, hamming window issue

Date	2010-12-15 20:39
From	peiman khosravi
Subject	[Csnd] is this a bug? gen 20, hamming window issue
	Hello again, There seems to be a problem with the hamming window generated by GEN20. I'm using the table as windowing function for partikkel. Please listen to the short sounds bellow. The csds are identical but the first uses hamming and the second hanning windows. The glitches in the first one make it basically unusable. Is this normal with hamming windows? http://idisk.mac.com/peimankh-Public/hamming.aif http://idisk.mac.com/peimankh-Public/hanning.aif Incidentally the picture shows the generated function table content. Table 100 (hamming) seems to start and end above the zero line which is what is producing the glitches, I don't know if this is normal. giWinHamming ftgen 100, 0, 4096, 20, 1 ; Hamming giWinHanning ftgen 101, 0, 4096, 20, 2 ; Hanning http://idisk.mac.com/peimankh-Public/windows.png Thanks very much in advance. Best, Peiman 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	2010-12-15 20:58
From	Richard Dobson
Subject	[Csnd] Re: is this a bug? gen 20, hamming window issue
	The Hamming window does indeed start and end with non-zero values. It is very much associated with tasks such as FFT analysis, and is not designed for use as an envelope. I would suggest sticking with the Hann window. Richard Dobson On 15/12/2010 20:39, peiman khosravi wrote: > Hello again, > > There seems to be a problem with the hamming window generated by GEN20. > > I'm using the table as windowing function for partikkel. Please listen > to the short sounds bellow. The csds are identical but the first uses > hamming and the second hanning windows. The glitches in the first one > make it basically unusable. Is this normal with hamming windows? > .. 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	2010-12-15 21:49
From	Oeyvind Brandtsegg
Subject	[Csnd] Re: is this a bug? gen 20, hamming window issue
	It seems odd to use a (complete) windowing function with partikkel, it commonly expects an "attack shape" and a "decay shape", like splitting the window function on two if you wish. If you want to, you can send me your csd and I'll take a quick look at it. I use these attack/decay shapes a lot: giSigmoRise ftgen 0, 0, 8193, 19, 0.5, 1, 270, 1 ; rising sigmoid, attack shape giSigmoFall ftgen 0, 0, 8193, 19, 0.5, 1, 90, 1 ; falling sigmoid, decay shape all best Oeyvind 2010/12/15 peiman khosravi : > Hello again, > > There seems to be a problem with the hamming window generated by GEN20. > > I'm using the table as windowing function for partikkel. Please listen > to the short sounds bellow. The csds are identical but the first uses > hamming and the second hanning windows. The glitches in the first one > make it basically unusable. Is this normal with hamming windows? > > http://idisk.mac.com/peimankh-Public/hamming.aif > http://idisk.mac.com/peimankh-Public/hanning.aif > > Incidentally the picture shows the generated function table content. > Table 100 (hamming) seems to start and end above the zero line which > is what is producing the glitches, I don't know if this is normal. > > giWinHamming ftgen 100, 0, 4096, 20, 1 ; Hamming > giWinHanning ftgen 101, 0, 4096, 20, 2 ; Hanning > > http://idisk.mac.com/peimankh-Public/windows.png > > > Thanks very much in advance. > > Best, > > Peiman > > > 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	2010-12-15 23:27
From	peiman khosravi
Subject	[Csnd] Re: Re: is this a bug? gen 20, hamming window issue
	Great, thanks very much. Richard, that makes sense now. I learned a new thing today! Oeyvind, that serves me right for not reading the manual properly! My csd is a real mess right now, I will send you a copy as soon as I have it tidied up a bit! Cheers, Peiman On 15 December 2010 21:49, Oeyvind Brandtsegg wrote: > It seems odd to use a (complete) windowing function with partikkel, > it commonly expects an "attack shape" and a "decay shape", > like splitting the window function on two if you wish. > > If you want to, you can send me your csd and I'll take a quick look at it. > I use these attack/decay shapes a lot: > giSigmoRise ftgen 0, 0, 8193, 19, 0.5, 1, 270, 1 ; rising > sigmoid, attack shape > giSigmoFall ftgen 0, 0, 8193, 19, 0.5, 1, 90, 1 ; falling > sigmoid, decay shape > > > all best > Oeyvind > > 2010/12/15 peiman khosravi : >> Hello again, >> >> There seems to be a problem with the hamming window generated by GEN20. >> >> I'm using the table as windowing function for partikkel. Please listen >> to the short sounds bellow. The csds are identical but the first uses >> hamming and the second hanning windows. The glitches in the first one >> make it basically unusable. Is this normal with hamming windows? >> >> http://idisk.mac.com/peimankh-Public/hamming.aif >> http://idisk.mac.com/peimankh-Public/hanning.aif >> >> Incidentally the picture shows the generated function table content. >> Table 100 (hamming) seems to start and end above the zero line which >> is what is producing the glitches, I don't know if this is normal. >> >> giWinHamming ftgen 100, 0, 4096, 20, 1 ; Hamming >> giWinHanning ftgen 101, 0, 4096, 20, 2 ; Hanning >> >> http://idisk.mac.com/peimankh-Public/windows.png >> >> >> Thanks very much in advance. >> >> Best, >> >> Peiman >> >> >> 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"