Subject: Re: [ecasound] full duplex
From: Jeremy Hall (email@example.com )
Date: Wed Oct 27 1999 - 19:08:52 EEST
my card has /dev/dsp0 as a read/write device, and/dev/dsp1 as a write-only
device. These are two separate devices with two separate outputs. What I
want is to read from /dev/dsp0, then write some stuff back to it.
I am seeing delays when I attempt to multitrack record, for example, if I
have 5 tracks, and I record them in succession, first record track 1. play
track1 and record track2. play tracks 1&2, record track 3, etc.
If I take this approach, visible delays occur between track1 and track5.
The latter tracks always get slower and lag behind the lower numberred
It appears to be directly related to the buffer size.
Kai Vehmanen said:
> On Tue, 26 Oct 1999, Jeremy Hall wrote:
> > Does ecasound attempt to use fdx? are there plans?
> Hmm, what do mean by this? Ecasound has always supported full-duplex.
> What it doesn't support is opening the same device twice. But as far
> as I know, all full-duplex drivers (OSS/Linux, ALSA) support multiple
> logical devices (/dev/dsp0 ... dspn, etc), so this shouldn't be
> a problem.
> Kai Vehmanen (firstname.lastname@example.org)
> Webmaster, Wakkanet Oy
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