Re: [linux-audio-user] Resampling loop libraries

Hallo, Mark Knecht hat gesagt: // Mark Knecht wrote: In my understanding (which may well be much out of date) the Acid-info is just meta-data to let Acid show things like bpm and such quckly. So it's useless for time stretching or shifting (I use these terms interchangably, which is technically not correct, I guess) Normally stretching is done in one of these ways: a) Resampling by changing the sample rate. This also changes pitch and has artifacts, unless you do counter measures. Vinyl DJs do it a lot in the analog realm. b) rotating-tapehead delay pitch shifting. I think, Steve made a plugin that works this way. You might use it for example with ecasound. This is an old-fashioned effect and can be heard. Itself, it only changes pitch and thus can undo the resampling side-effects. c) FFT-based pitch shifting. I think, Steve also made a plugin with this approach (of course ;) It gives good results. d) Granular resynthesis. This is used increasingly in commercial software, for example Ableton Live is somehow a granular sample player. The SndObj-library has a cool granulator called syncgrain that I ported to a Pd external. As usual with granular synthesis, you need to control a lot of paramenters, which can be difficult. But simple loop-speed changing is rather easy with that. ciao -- Frank Barknecht _ ______footils.org__