[alsa-devel] Output levels issue on Plantronics .Audio 510 USB Headset
David Hilvert
dhilvert at gmail.com
Thu Nov 1 22:36:04 CET 2007
The Plantronics .Audio 510 USB headset (Vendor=047f ProdID=c001) seems to have
certain output levels issues with drivers in 2.6.23-rc2-mm2 (at least). In
particular, setting
amixer -c 1 sset PCM 3
results in no output, while
amixer -c 1 sset PCM 4
results in levels that are somewhat loud for applications tested. Volume
appears to be roughly linear in the range above PCM=4, if loud for applications
tested.
The USB ID information (Vendor=047f ProdID=c001) doesn't seem to be noted as
exceptional by any driver code in the 2.6.23-rc2-mm2 kernel, and web searches
for 'plantronics' or 'audio 510' and linux or alsa seem to return little
pertinent information. What would be most useful to try next?
Various outputs follow:
$ amixer -c 1
Simple mixer control 'PCM',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 151
Mono:
Front Left: Playback 6 [4%] [-27.29dB] [on]
Front Right: Playback 6 [4%] [-27.29dB] [on]
Simple mixer control 'Mic',0
Capabilities: cvolume cswitch cswitch-joined
Capture channels: Mono
Limits: Capture 0 - 16
Mono: Capture 14 [88%] [21.00dB] [on]
Simple mixer control 'Auto Gain Control',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
$ cat /proc/bus/usb/devices
T: Bus=05 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=047f ProdID=c001 Rev= 1.00
C:* #Ifs= 4 Cfg#= 1 Atr=a0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 1 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=01(O) Atr=09(Isoc) MxPS= 200 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=82(I) Atr=05(Isoc) MxPS= 100 Ivl=1ms
I:* If#= 3 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid
E: Ad=83(I) Atr=03(Int.) MxPS= 4 Ivl=32ms
More information about the Alsa-devel
mailing list