Re: [ecasound] alsa device as input

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Subject: Re: [ecasound] alsa device as input
From: Jeremy Hall (jhall@uu.net)
Date: Mon Jan 29 2001 - 14:43:39 EET


I have found that in the past, /dev/dsp was more efficient than alsa
support. This didn't make sense to me at the time, but I found a bytes to
frames error in the alsa source (audioio_alsa3.cpp)

I haven't checked to see if it still exists.

_J

In the new year, Kai Vehmanen wrote:
> On Thu, 18 Jan 2001, Gerhard Olejniczak wrote:
>
> > I use ecasound 1.8.2r14 together with alsa 0.5.10a. Driver for my
> > soundcard
> > is es1968. I have created the alsa devices with "snddevices" form the alsa
> [...]
> > If I try "ecasound -i alsa,0,0 -o something.wav" I get the error:
> > ERROR: [AUDIOIO - ALSA2]: "Channel count 2 is out of range!"
>
> This seems odd. In the above case ALSA drivers report that your card
> doesn't support recording in 2-channel mode. This is probably not true.
> Have you tried recording with arecord?
>
> > "ecasound -i something.wav -o alsa,0,0" works. Using /dev/dsp (OSS
> > emulation) as device also works for input and output.
> [...]
> > Is there any difference in using /dev/dsp or alsa devices?
>
> Depends on what you do. The bottom line is: use what works. For instance I
> often use ALSA's OSS-emulation. It works well, and when you have a cheap
> consumer card like my sb128, using the native driver interface doesn't
> offer many benefits to the end user. This will probably change at some
> point when there are more native ALSA utils available.
>
> --
> . http://www.eca.cx ... [ audio software for linux ] /\ .
> . http://www.eca.cx/sculpscape [ my armchair-tunes mp3/ra/wav ]
>
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