Re: [ecasound] picking up stattic with -b:64

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Subject: Re: [ecasound] picking up stattic with -b:64
From: Kai Vehmanen (kaiv@wakkanet.fi)
Date: Sat Jan 22 2000 - 15:43:06 EET

On Fri, 21 Jan 2000, Jeremy Hall wrote:

> The following ecasound command picks up some static.
>
> ecasound -i /dev/dsp -o stdout -z:db -b:64 | msend 239.1.1.1/24430/7
>
> What causes this? -b:128 seems to do better, but I'd like to understand
> what makes the static.

You're probably suffering from overruns (ecasound doesn't read data
from /dev/dsp fast enough). With -b:64, ecasound has only 1.45ms (srate
44100) to go through the input-process-output cycle. This really is
not much (think about harddisk average seek times!) You should expect
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). 

-- 
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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