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Author Topic: Sheevaplug USB Audio badly distorted  (Read 4257 times)
Brandt
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« on: September 29, 2010, 12:33:33 PM »

I am using one of those "3D Sound" USB audio adapters that usually work perfect with linux according to reviews. Well it works on my Synology NAS, and it works on my Macbook Pro, but it is distorted on the Sheevaplug.

The sound it so distorted I can't even tell what it is.

Could anyone help me troubleshoot?
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vitappl
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« Reply #1 on: September 29, 2010, 02:03:25 PM »

I get a normal sound but without the usb hub. Tried different audio adapters, but the result is the same - usb hub spoils the sound.
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Brandt
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« Reply #2 on: September 29, 2010, 04:12:24 PM »

That was not true for my on my linux based NAS, however for setting things up on the sheevaplug I have the usb adapter plugged directly
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birdman
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« Reply #3 on: September 29, 2010, 05:20:59 PM »

The sound it so distorted I can't even tell what it is.
I've only got a Logitech EasyCall Speakerphone I happened to have lying around (i.e. it's not HiFi quality anyway) and whereas I did set it up under Ubuntu I hadn't yet done so under my Debian Squeeze setup.  But I just have.
I have it running though a Belkin Hub (NEC chipset).
At first it sounded fine, but then it was very crackly.  I wondered if this was because I'd unplugged it then plugged it back in - but no.
The difference seems to be the software I use to drive it.

Playing sounds files with mplayer it sounds fine.   Using alsaplayer it's very crackly.

So you might wish to experiment with using different software and seeing how each sounds?
« Last Edit: September 29, 2010, 05:27:57 PM by birdman » Logged

Brandt
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« Reply #4 on: September 29, 2010, 07:12:10 PM »

Same thing with mplayer...distorted...I even switched out the USB adapter with my USB logitech headset...same same same


root@haplug:~# mplayer track39.mp3
MPlayer 1.0rc3-4.4.4 (C) 2000-2009 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing track39.mp3.
Audio only file format detected.
Clip info:
 Title: Track 39                     
 Artist:                               
 Album:                               
 Year: 1999
 Comment: , AG# F7355561               
 Genre: Pop
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 16000->176400)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
AO: [pulse] Init failed: Connection refused
Failed to initialize audio driver 'pulse'
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A:  25.7 (25.7) of 33.0 (33.0) 26.6% $<50>
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edwardwo
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« Reply #5 on: September 29, 2010, 11:36:37 PM »

I've experienced the same problem before, when I used MPD to play, either there were noticeable noise, or the sound was inconsistent. So I compile the MPD manually, and it's OK now. I haven't tried mplayer or others yet.
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Brandt
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« Reply #6 on: September 30, 2010, 08:49:22 AM »

I don't think it's any one program, I think it's a matter of setting up ALSA properly
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Brandt
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« Reply #7 on: January 14, 2011, 05:35:07 PM »

well i was able to compile and use pianobar to stream pandora successfully....still problems with my text to speech crackling
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lyzby
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« Reply #8 on: January 19, 2011, 09:18:00 PM »

I'm not certain it will fix the problems here, but crackly sound on my dockstar running debian was fixed by the /etc/asound.conf file in the second post in this thread: "USB sound - scratchy [ SOLVED ]" here: http://forum.doozan.com/read.php?2,2840
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