Subject: Re: [ecasound] picking up stattic with -b:64
From: Jeremy Hall (jhall@UU.NET )
Date: Tue Jan 25 2000 - 18:07:48 EET
then when does db help you?
_J
In the new year, Kai Vehmanen wrote:
> On Mon, 24 Jan 2000, Jeremy Hall wrote:
>
> >>> ecasound -i /dev/dsp -o stdout -z:db -b:64 | msend 239.1.1.1/24430/7
> >> trouble if you go under -b:128. In this case, I suspect msend is not
> >> able to pipe data fast enough (meaning latency, not transfer rate).
> > it does a read() on 1024 bytes, then does a write() of the same data. It
> > is a very simple program, and has no disk access. It then multicasts this
>
> It can still cause problems. Soundcard i/o consumes some of the
> available time, so in practice msend has even less than 1.45ms (-b:64)
> to do its stuff. And as far as I know, network cards (and TCP/IP stack
> implementations) suffer from latency problems. But I'm no network-h/w
> expert, so you probably know more about these...
>
> Btw; -z:db (double-buffering) doesn't do any good in this case. It
> currently only affects .wav and .raw inputs.
>
> --
> Kai Vehmanen <kaiv@wakkanet.fi> -------- CS, University of Turku, Finland
> . http://www.wakkanet.fi/ecasound/ - linux multitrack audio processing
> . http://www.wakkanet.fi/sculpscape/ - ambient-idm-rock-... mp3/ra/wav
>
>
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