Re: [PD] Re: Looping
You will have to have an envelope to avoid clicks, even though it need only be 10-20 ms, which is fairly inaudible. Otherwise, you'll just have to make sure that the beginning and end of your sample both are exactly the same amplitude (traditionally 0) or the discontinuity will cause a click. I'm guessing that most pro audio apps automatically envelope their playback by 10-20 ms when scrubbing the sample. If it is a quick linear or exponential envelope of that small of a time, which then stays at 1 until the very end of the playback, you won't even notice it. ~Kyle On 2/3/07, PORRES [EMAIL PROTECTED] wrote: yes, the question was why want it as smooth in pd as in other softwares... but hey, you say it was as bas in all you had... hmm, that sounds weird to me, cause thats not what i got. well, the matter is also not the sample anyway... being dodgy or not, and it is actually a looping matter in pd. i aint got that many loops here actually, so I couldnt try them to see if another .wav file would do better... i will look for it though... and test it. Do you guys have any patch at all that loops .wav files rather nicely the way I want, which is continuosly loud without envelopes and all? cheers alex hard off [EMAIL PROTECTED] wrote: well, i just checked the sample, and it didn't loop smoothly in any software i have. then i opened it in a sound editor, and the start point is zero, but the end point is not zero, which would be why pd makes a drastic click. i will now bow out of this discussion, because i can't see why anyone would want to loop such a dodgy sample in the first place. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list TV dinner still cooling? Check out Tonight's Picks on Yahoo! TV. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- http://theradioproject.com http://perhapsidid.blogspot.com (()()()(()))()()())( (())(())()((( ))(__ _())(()))___ (((000)))oOO ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Re: Looping
another way is to use xgroove (an external by thomas grill). there's a cross-fading (end mixed with start). pat ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] Re: Looping
hi there, thanks for looking at it for me, I really apreciate it... Im not sure wether this problem might be indeed the DC offset, it seems that is a particular problem with pd looping stuff around. This is because it's a quite drastic click that I do not hear when I loop it on Sound Forge... Do you know what I mean??? anyway... I tried a high pass filter on sound forge, and it didn't work that well, it kinda made it click when it didn't... As for the spectrum loop and timbre change, I see what you mean, I will try to do it, I couldnt invert the phase so far. cheers alex padawan12 [EMAIL PROTECTED] wrote: Looks like you cut it right for the phase actually. What I notice looking at it in the editor is quite a bit of VLF, there's a wobble in there at about 2-4 Hz. Very low frequencies tend to give you a DC offset mismatch wherever you cut it, so try high passing it at above 20Hz. Also, there's a bit of movement in the spectrum up top, quite a noisy effect that might be making it difficult to loop without an apparently sudden change of timbre. There are two ways around this. One is to make a crossfade of 3 sections, mix them down and then cut it 1/3 of the way from each end, the start and end will have the same spectrum. The other way is to double the length of it by copying, reverse, invert phase and insert append (you get a symmetrical forwards - backwards loop that starts and ends on the same spectrum) On Tue, 30 Jan 2007 11:18:37 -0800 (PST) PORRES wrote: thanks, the samples seem to be ok when looped in sound forge and all... check the wave loop file attached. cheers alex Charles Henry wrote: Hey, there, Alex, I had been talking about this with Andy a while back, and we concluded that clicking occurs because of phase discontinuities between the beginning and end of the loop. Could you send me the loop? Any thoughts, Andy? Best wishes, Chuck On 1/30/07, PORRES wrote: hi there, I edited a nice sample to play looped in od, but it clicks a lot, i dont know why... anyone ever had this problem and has any ideas on overcoming it? cheers alex Charles Henry wrote: By the way, Kim, could you tell me what the feedback loop is? (what kinds of operations are you using? is it linear?...etc...) If it's linear, you should be able to replace the feedback loop with an equivalent operation, which circumvents the whole problem. Chuck ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut. - 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut. - Don't get soaked. Take a quick peak at the forecast with theYahoo! Search weather shortcut.___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Re: Looping
PORRES a écrit : hi there, thanks for looking at it for me, I really apreciate it... Im not sure wether this problem might be indeed the DC offset, it seems that is a particular problem with pd looping stuff around. Hello, it's possible to remove this DCoffset with an highpass filter [hip~ 5] pc ___ Yahoo! Mail réinvente le mail ! Découvrez le nouveau Yahoo! Mail et son interface révolutionnaire. http://fr.mail.yahoo.com ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Re: Looping
maybe i'm completely missing the point here, but if you're looping a sample from exactly start to finish, then just zoom in really close in soundforge and cut the start point so that the sample starts at a zero crossing, and then do the same with the end point. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Re: Looping
well, i just checked the sample, and it didn't loop smoothly in any software i have. then i opened it in a sound editor, and the start point is zero, but the end point is not zero, which would be why pd makes a drastic click. i will now bow out of this discussion, because i can't see why anyone would want to loop such a dodgy sample in the first place. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Re: Looping
oops, shouldn't be so rude...my mistake. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] Re: Looping
Looks like you cut it right for the phase actually. What I notice looking at it in the editor is quite a bit of VLF, there's a wobble in there at about 2-4 Hz. Very low frequencies tend to give you a DC offset mismatch wherever you cut it, so try high passing it at above 20Hz. Also, there's a bit of movement in the spectrum up top, quite a noisy effect that might be making it difficult to loop without an apparently sudden change of timbre. There are two ways around this. One is to make a crossfade of 3 sections, mix them down and then cut it 1/3 of the way from each end, the start and end will have the same spectrum. The other way is to double the length of it by copying, reverse, invert phase and insert append (you get a symmetrical forwards - backwards loop that starts and ends on the same spectrum) On Tue, 30 Jan 2007 11:18:37 -0800 (PST) PORRES [EMAIL PROTECTED] wrote: thanks, the samples seem to be ok when looped in sound forge and all... check the wave loop file attached. cheers alex Charles Henry [EMAIL PROTECTED] wrote: Hey, there, Alex, I had been talking about this with Andy a while back, and we concluded that clicking occurs because of phase discontinuities between the beginning and end of the loop. Could you send me the loop? Any thoughts, Andy? Best wishes, Chuck On 1/30/07, PORRES wrote: hi there, I edited a nice sample to play looped in od, but it clicks a lot, i dont know why... anyone ever had this problem and has any ideas on overcoming it? cheers alex Charles Henry wrote: By the way, Kim, could you tell me what the feedback loop is? (what kinds of operations are you using? is it linear?...etc...) If it's linear, you should be able to replace the feedback loop with an equivalent operation, which circumvents the whole problem. Chuck ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut. - 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
