Subject: Re: [linux-audio-dev] BruteFIR + jack = crackling noise?
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Mon Feb 24 2003 - 18:19:53 EET
On Mon, Feb 24, 2003 at 04:54:56PM +0100, Martijn Sipkema wrote:
> [...]
> > many USB audio interfaces work in a fundamentally different way than
> > other audio interfaces. rather than sending an "interrupt" to the host
> > after processing 2^N frames, they send an interrupt every N
> > msecs.
>
> And JACK doesn't support this because it needs a constant size
> (frames) period. IMHO the audio interface should dictate the period
> size and it need not be constant.
>
> Perhaps you would reconsider having JACK use constant (frames)
> callbacks?
I think a better solution might be to buffer up enough samples so that
jackd can provide a constant number of frames.
- Steve
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