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Realtime group scheduling doesn't know JACKRealtime group scheduling doesn't know JACKPosted Dec 22, 2010 0:35 UTC (Wed) by baldridgeec (guest, #55283)In reply to: Realtime group scheduling doesn't know JACK by jimparis Parent article: Realtime group scheduling doesn't know JACK
Composing, even electronica, is also "live" unless you're doing it in a MOD editor from the 90s.
When I'm playing my electronic drum kit using Hydrogen to provide the samples, BELIEVE ME, there is a very very noticeable difference between hearing your snare strike 10 ms after your stick hits the pad and 50 ms after your stick hits the pad. 50 ms is still playable if it's consistent, and if you practice at it a bit - some people use Windows, after all, so it obviously works, even if it's not ideal. :)
But 100 ms is not usable at all. A tenth-second gap means there is no relation whatsoever between the part of the phrase in your head (that is currently being conveyed through your hands to the equipment) and the part of the phrase coming into your ears and being interpreted by your brain as "what I'm playing right now." You can't force half of your brain to work 1/16 note in the past at the same time as you play what you need to for the present. It just won't work.
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Realtime group scheduling doesn't know JACK Posted Dec 22, 2010 1:51 UTC (Wed) by nix (subscriber, #2304) [Link]
Actually you *can* train yourself to do it: I can think of several works in which you have to (the Phase works by Steve Reich, for example). But they're rare, and it's difficult, and you really wouldn't want to do it for everything.
Realtime group scheduling doesn't know JACK Posted Dec 22, 2010 2:04 UTC (Wed) by baldridgeec (guest, #55283) [Link]
(Just looked them up, never heard of them before, interesting! I'll have to find some recordings)
From what it says on Wikipedia, it's played as a duet - i.e. the music you play is still in time with itself; your part is in phase with the other part.
Still hell to play, yeah, but it would be pretty much impossible if the sound from your own piano were to come at you with an audible delay. It would be easier to play if you were deaf - at least then nothing would interfere with the rhythm in your head.
Realtime group scheduling doesn't know JACK Posted Dec 22, 2010 12:00 UTC (Wed) by nix (subscriber, #2304) [Link]
Actually one of the ways to play it *is* with headphones that pick up what you're hearing and rebroadcast it to you delayed by just enough (a changing delay): then all you have to do is keep what you hear from becoming phased! (Another common way, and probably the more effective one, is to play the second part without a tape of the first part at all, just with a metronome beat defining when the first part's beats are, then mix the two together later. But you can't do that live and it feels obscurely like cheating. Live performers generally have to do it without any artificial assistance at all, and that *is* hard.)
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