Hi,

 The video works just fine in both applications, but it has no sound. However, 
I can play ogv videos with sound just fine from Gnome Sound Recorder and Totem 
Movie Player.

 My preferred sound device is a Plantronics .Audio 646 DSP usb headset. I have 
also tried plugging in a set of Apple ear buds to the traditional sound jacks. 
I do not get any sound from any source when attempting to play videos from VLC, 
Iceweasel, or Epiphany.

 I am using Debian Squeeze.

 I searched the debian-user archives and found (at least some of) the commands 
I need to get the requisite information. I'm not sure what everything means, 
but it's a start.

 # lsusb
 Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 006 Device 002: ID 047f:c001 Plantronics, Inc.
 Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 005 Device 002: ID 0461:4d0f Primax Electronics, Ltd
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

 # lspci -knn | grep -iA2 audio
 00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia (Intel HDA) 
[1002:4383] (rev 40)
 Subsystem: ASUSTeK Computer Inc. Device [1043:8410]
 00:14.3 ISA bridge [0601]: ATI Technologies Inc SB700/SB800 LPC host 
controller [1002:439d] (rev 40)
 --
 01:00.1 Audio device [0403]: ATI Technologies Inc Redwood HDMI Audio [Radeon 
HD 5600 Series] [1002:aa60]
 Subsystem: Dell Device [1028:aa60]
 02:00.0 USB Controller [0c03]: NEC Corporation uPD720200 USB 3.0 Host 
Controller [1033:0194] (rev 03)

 # cat /proc/asound/cards
 1 [DSP ]: USB-Audio - Plantronics .Audio 646 DSP
 Plantronics Plantronics .Audio 646 DSP at usb-0000:00:13.0-1, full speed

 # lsof $(find /dev/ -group audio)
 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
 mixer_app 2963 kevin 21r CHR 116,6 0t0 3881 /dev/snd/controlC1
 totem 3225 kevin mem CHR 116,4 3879 /dev/snd/pcmC1D0p
 totem 3225 kevin 27r CHR 116,4 0t0 3879 /dev/snd/pcmC1D0p

 # ls /dev/dsp
 ls: cannot access /dev/dsp: No such file or directory

 # ls -R /dev/snd
 /dev/snd:
 by-id by-path controlC1 pcmC1D0c pcmC1D0p seq timer

 /dev/snd/by-id:
 usb-Plantronics_Plantronics_.Audio_646_DSP-00

 /dev/snd/by-path:
 pci-0000:00:13.0-usb-0:1:1.0

 If you need any further information, please let me know.

 I am aware that I may need to use modprobe or some such interface to unload 
and reload modules from the Linux kernel. However, I have never directly 
manipulated kernel modules until now.

 Thank you in advance,
 Kevin

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