Re: O'Reilly critique on Linux and audio

From: philicorda (philicorda_at_localhost.com)
Date: 07/25/05


Date: Sun, 24 Jul 2005 23:50:49 GMT

On Sun, 24 Jul 2005 16:24:05 -0700, Citizen Ted wrote:

> On 24 Jul 2005 13:04:43 -0700, "Oksana" <oksana_linux_girl@yahoo.com>
> wrote:
>
>>You must be a total idiot if you can't make Linux work for basic
>>recording needs.I am using Linux every day to make my recordings mostly
>>because i do not have the money to spend on commercial programs.
> <snip>
>
> I may be a total idiot, too, but I can't get any audio interface to
> input 24-bit audio into any Linux recording software.
>
> Using the Linux core to record 16-bit 44.1K is all fine and dandy and
> works just great. Rosegarden is particularly cool. But some of us
> (actually, the vast majority of audio recordists) need 24-bit and
> higher sampling rates.
>
> If you Linux gurus know of any audio interface or Linux recording
> program that work together and record 24-bit and/or sample rates
> beyond 44.1K, please let me know.
>
> Until then, it's Win Xp and Tiger for me.

What audio interface do you have?
You really should use Jackd and Ardour for this kind of thing.
Jack will default to 32bit audio, then try 24bit and then 16 if the others
don't work.

Try starting qjackctl, clicking on 'setup' and changing the sample rate.
Start Jack and it will refuse if the sample rate is not supported.

Or, in console style... For a working input at the highest bit depth the
card supports, you should see something like this. (Gina-20)

"[philicorda@philus ~]$ jackd -d alsa -d hw:2
jackd 0.100.1
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:2|hw:2|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:2
configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
nperiods = 2 for capture
nperiods = 2 for playback"

For something like a soundblaster, it'll like like this:

"[philicorda@philus ~]$ jackd -d alsa -d hw:0
jackd 0.100.1
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
Note: audio device hw:0 doesn't support a 32bit sample format so JACK will try a 24bit format instead
Note: audio device hw:0 doesn't support a 24bit sample format so JACK will try a 16bit format instead
nperiods = 2 for capture
Note: audio device hw:0 doesn't support a 32bit sample format so JACK will try a 24bit format instead
Note: audio device hw:0 doesn't support a 24bit sample format so JACK will try a 16bit format instead
nperiods = 2 for playback
"

If the card supports 24bit and 96k, then it should work.

>
> - TR



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