Re: [gentoo-user] Using Gentoo for Sound Recording

[Christoph Eckert]

[qjackctl]

> Hi Christoph - yes, that was the gui I was working on.  

nice app for controlling jackd (start, stop, audio connections).

> Jack wont start for some reason from the CLI (I don't know why)
>
> Here is a transcript of the session attempt to start jackd
>
> audacity ~ # jackd -dalsa

I use an external USB breakout box and qjackctl shows the following 
line:

/usr/local/bin//jackd -R -P83 -p64 -dalsa -dhw:2 -r48000 -p256 -n3

As you can see, it's a bit more than yours :)

> JACK compiled with System V SHM support

You should have mounted shm via /etc/fstab to get lower latencies. Mine 
reads as the following:

none /dev/shm tmpfs defaults 0 0

[...]

> Couldn't open hw:0 for 32bit samples trying 24bit instead
> Couldn't open hw:0 for 24bit samples trying 16bit instead
> ALSA: cannot set number of periods to 2 for capture
> ALSA: cannot configure capture channel
> cannot load driver module alsa
> audacity ~ #
>
>
>
> I really don't know what the problem is, as ALSA works fine,
> its in use with audacity.
    ^^^^^^^^^^^^^

As long as your sound device is blocked by another app, you will not 
succeed with any other app. Stop all apps. including soundservers like 
artsd, esound, gstreamer and the like.

> Sadly, it turns out that ardour does not have the one specific
> functionality that I needed, but it may be useful anyway, and I would
> like to play with it.

Ardour is a great example for the power of OSS vs. commercial 
applications. It's not only comparable but equal to apps like Ableton.


Best regards


ce


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