Let's brainstorm..Setting up MinimServer to feed a USB DAC

[simoncn]

(12-01-2014 06:28)classical11 Wrote:  I am using a Belkin 7 port powered hub:
http://www.amazon.com/Belkin-USB-2-0-7-P...rt+usb+hub

It comes with a 5V, 2.5A power supply.

This may be a red herring but I noticed that your hub's power supply can only give 1A so perhaps it's a power issue?

Do you feed power from the hub back into the Raspberry Pi (via a USB port on the hub)? Or do you power the Raspberry Pi independently? Do you have other devices plugged into your USB hub?

If the DAC is the only device and you power the Raspberry Pi independently, then this can't be it.

If you have other devices plugged into the hub maybe the DAC is not getting enough power from the hub.

I've read various reports from Raspberry Pi users complaining of system stability issues when using low powered hubs (or no hub at all).

The hub has a 2A power supply. The Pi and the hub are powered independently. The hub is also powering a mouse, a keyboard and a 2.5 inch HDD. I will try removing the other devices from the hub to see if that helps.

Quote:You can list your ALSA playback devices with "aplay -l". In my case, I get this:

Code:

pi@pi1 ~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 1: UD110v2 [UD110v2], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I am using 1,0 because the card ID of the DAC is 1. It's strange that it is 0 in your case because I would expect the built in analog card to always be the first. But I would have thought that you'd get absolutely no sound at all if you used an incorrect card id.

Thanks for this information. The 0 card ID is probably because of the change I made following Pete's suggestion in this post.