dec 13th from stimming’s advent calendar: #samplerate, #latency and #timestretchalgorithm: My set has a sample rate of 96kHz but only 16bit sample depth because of the file-size. My sample buffer is 512 samples. The higher the sample rate the lower the latency but this costs processing power. I’m running the fastest macbook pro retina on the market but I still have one hiccup every 1,5 sets (which is the usb connections fault I guess). I choosed to do so because of sound quality (ableton sounds better at higher sample rates) - you have to dial in the sample rate at the very beginning of a new set and then include your wave files, otherwise the pitch will sound weird. keeping the audio latency as low as possible is very important because this is the amount of time ableton needs for your controller input - if your having 25ms of delay on every action its difficult to be precise in controlling your volumes or any other action. The time stretch algorithm I use is the one called „Re-Pitch“: Ableton acts like an old school sampler, as well as like a Turntable or a pitchable CD Player - depending on the original tempo its in- or decreasing the pitch but keeping the sound itself intact. The other algorithms allow you to independently change pitch or tempo but they do this with artificial added grains depending on your material. Because I’m using only three busses per track every bus is very complex - on very complex material those algorithms „do not sound good anymore“: you can easily hear this on the attack from your bass drum - they actually destroy the tightness. so - best is to combine those algorithms: for very important signals like the bass drum I strongly recommend not to use any other than the Re-Pitch algorithm. but as it changes the tonal pitch its not possible to mix tonal signals with different tempo. that’s why I need to tune the moog voyager for every track (for which I have a help channel with the ground tone in original tempo on channel 10 for each track to tune the voyager via my in-ear monitors). the best way for me to bounce those busses would have been to strictly separate tonal from percussive elements but when I did those bounces I followed my mixing logic and not my liveset-logic: a big mistake which will cost me many hours of fixing this. ;) tradeoffs everywhere - that’s real life, yeah!
Posted on: Sat, 13 Dec 2014 19:00:00 +0000
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