[alsa-devel] Call for testing: ALSA driver for Fireworks/BeBoB based devices

Brand, Mark (Mr) (Summerstrand Campus South) Mark.Brand at nmmu.ac.za
Fri Mar 7 12:21:01 CET 2014

Hi Takashi,

I can report successful playback and recording on my M-Audio Ozonic since switching to latest svn ffado-mixer/ffado-dbus.  Thank you very, very much for this!

Kind regards,
Mark Brand.

-----Original Message-----
From: Takashi Sakamoto [mailto:o-takashi at sakamocchi.jp]
Sent: Monday, February 24, 2014 9:17 AM
To: Brand, Mark (Mr) (Summerstrand Campus South)
Cc: alsa-devel at alsa-project.org; ffado-devel at lists.sf.net
Subject: Re: Call for testing: ALSA driver for Fireworks/BeBoB based devices

Hi Mark,

 > The terminal output of aplay seems to reflect successful playback, and I hear audible clicks as  >  the file starts and ends its playback.

It's quirk of BeBoB. If you avoid the click noise, add silent PCM samples into your file or use sound server such like jackd/PulseAudio.

But PulseAudio have an issue. See:
[pulseaudio-discuss] 'Failed to find a working profile' for firewire sound devices http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-January/019685.html

 > Please, is there anything you can suggest that I should try next?
 > Is there anything obvious that I appear to have overlooked?

A combination of these tools will help your debug.
  - ffado-mixer/ffado-dbus (the recent revision)
  - aplay/arecord
  - /proc/asound/Ozonic/#meter

Especially, Ozonic can reports its metering for each Analog input/Stream input/Analog output.

 > However, I have not yet been able to get audio playback (using "aplay -D plughw:2,0  > Desktop/test.wav").  The .wav file is a short, 44.1/16 mono file saved from Audacity,  > if that's relevant.

I guess that:
  - You expected to listen to 'Analog out 3/4'.
  - The aplay with plughw playbacks into 'Stream in 1/2'.
  - Ozonic's internal mixer didn't route 'Stream in 1/2' into 'Analog out 3/4'.


Takashi Sakamoto
o-takashi at sakamocchi.jp


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