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Author Topic: USB speakers ?  (Read 1887 times)
peter a
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« on: May 06, 2010, 04:22:51 AM »

As anyone had a play with using USB speaker with a Sheevaplug and Debian ?

I`ve just gone to the trouble of getting a powered Belkin hub , so now trying things out which wouldn`t work before , like my Logitech V10 speaker.

I`ve got them to work, but very crackly after playing a couple of wav files.

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tylernt
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« Reply #1 on: May 06, 2010, 10:29:07 AM »

What's the CPU utilization when playing audio? Sheeva just might not be fast enough. Either that, or your hub or device are running in USB 1.0 or 1.1 mode which doesn't have enough bandwidth. Might check to see if it's actually running full-speed 2.0.
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peter a
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« Reply #2 on: May 06, 2010, 11:21:44 AM »

I think it`s some form of memory or driver problem myself .

I don`t think the cpu use is very much and it is running at usb 2 speeds .
if I plug in the speakers for the first couple of files it works o.k, So it`s not that .
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Doug Grove
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« Reply #3 on: May 07, 2010, 12:23:48 PM »

Are you using ALSA sound?

Or, how are you laying music though your speakers?

If you are getting crackle and using ALSA sounds, chances are that ALSA is doing bit rate conversion.

For me, I use mpd, I had to change /etc/mtd.conf to configure the ALSA sound device correctly:

audio_output {
        type                    "alsa"
        name                    "USB Audio"
        device                  "hw:1,0"
        format                  "44100:16:2"
}

Hope that helps,

Doug
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peter a
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« Reply #4 on: May 07, 2010, 01:08:55 PM »

No idea if it is been used , but it`s been install , with other stuff like mpg123 , mpd and mpc etc

# play /mnt/sda1/share/alsa/Front_Right.wav

Input File     : '/mnt/sda1/share/alsa/Front_Right.wav'
Sample Size    : 16-bit (2 bytes)
Sample Encoding: signed (2's complement)
Channels       : 1
Sample Rate    : 48000

Time: 00:01.53 [00:00.00] of 00:01.53 (100% ) Samples out: 73.5k Clips: 0
Done.

 
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peter a
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« Reply #5 on: May 08, 2010, 05:27:14 PM »

I`ve set MPD and MPC up and no problem , even playing mp3s

I did have a little problem at first with it missing MPD_HOST and MPD_PORT .

WOW , I can how play music ...
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