Subject: Re: [ecasound] Simultaneously recording many tracks
From: Tommi Sakari Uimonen (tuimonen_AT_cc.hut.fi)
Date: Wed Jun 09 2004 - 10:23:58 EEST
The most important would be
> lowlatency/preemptive kernel configuration
and along with that
> ALSA drivers
Those should be enough to keep you going.
So instead of -i /dev/dsp, use -f 32,2,44100 -i alsa
But if you still need some tuning:
I'd say let ecasound use its own realtime system with big double buffers.
I've got more reliably recordings with that than with jackd. Though I
haven't tested ecasound with jackd, just used jack_rec or ardour.
> tuning disks with hdparm or in your kernel config
And find out what filesystem gives you the best results.
> make sure your soundcard(s) is on the highest priority possible IRQs
> typically this means IRQ 9
Yes, this is good point. 3,4,5,7 are bad irq's
> make sure your soundcard(s) is not sharing IRQ's with any other devices
> > I have this application where I need to record many
> > many 32-bit/44100 stereo channels at once with some
> > M-Audio delta 1010LT sound cards.
Multiple cards in one computer or one computer for each card?
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