[richie60]

Hi there, I have Ubuntu 10.04 installed with a USB to spdif converter to carry the sound to my AV amp.  I keep getting sound dropouts/interruptions all the time.  This is driving me nuts as I tried to find a solution via Google, but have come up with nothing so far.
 
Am I missing something simple or should I forget USB sound on Linux & go back to Windows 7?
 
I have set USB audio as the default but can't see what else to do.
 

 

[Dynobot]

Quote:

Hi there, I have Ubuntu 10.04 installed with a USB to spdif converter to carry the sound to my AV amp.  I keep getting sound dropouts/interruptions all the time.  This is driving me nuts as I tried to find a solution via Google, but have come up with nothing so far.
 
Am I missing something simple or should I forget USB sound on Linux & go back to Windows 7?
 
I have set USB audio as the default but can't see what else to do.
 

 
Which music player are you using?
Are you using PulseAudio or ALSA?
 

 

[richie60]

I've tried both, using different players, VLC for movies too - sound drops out.  I know pulseaudio is default in ubuntu, tried kubuntu where there is no pulseaudio, still has same problem.

 

[Dynobot]

Which USB to spdif converter are you using?
 
99% of the time you ONLY want to use ALSA.  I would be interested to know which converter you are using though.
 
 
Also have you tried straight spdif out instead of the converter?

 

[Dynobot]

Would you care to try Music Player Daemon?
 
If so, I can stay online and walk you through the whole process -if- you don't already know how....
 
Step by step it should take no more the 5 minutes.
 

 

[richie60]

I'm using one of these I got off ebay: 

[size=large] [size=small]HA INFO NG COAX USB to SPDIF/COAX Converter[/size][/size]

 
It works flawlessly under Windows.
 
I ran lsusb and got this output:  Highlighted in Red is the device recognised as the USB converter.
 
 
richard@laptop:~$ lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 002: ID 08bb:2902 Texas Instruments Japan 
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
richard@laptop:~$ richard@laptop:~$ lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 002: ID 08bb:2902 Texas Instruments Japan 
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
richard@laptop:~$ 
 

 

[Dynobot]

This web site might be of assistance in changing the priority of the USB device so that interrupts don't cause drop outs
 
http://subversion.ffado.org/wiki/IrqPriorities