[Alsa-user] Sound Blaster Digital Music SX playback works, but low volume in either R or L channel
Brought to you by:
perex
From: Keisuke K. <k.k...@gm...> - 2009-06-28 09:51:22
|
Hello, I have been trying to make Sound Blaster Digital Music SX work in my linux box. It is recognized, related modules (snd-usb-audio and others) are autoloaded, and the playback works. But the Right-Left volume balance is wrong. The left channel volume (sometimes right instead) is too small, though it is not zero. Something is wrong with the device configuration by ALSA as it works without problems under the Windows XP environment using system default USB audio driver. Can I ask your advice on this problem? Thanks in advance. The current environment as follows: # cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 1.0.20. Compiled on Jun 27 2009 for kernel 2.6.30. # aplay -l **** List of PLAYBACK Hardware Devices **** card 0: SX [Sound Blaster Digital Music SX], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: SX [Sound Blaster Digital Music SX], device 1: USB Audio [USB Audio #1] Subdevices: 1/1 Subdevice #0: subdevice #0 # cat /proc/asound/cards 0 [SX ]: USB-Audio - Sound Blaster Digital Music SX Creative Technology Ltd. Sound Blaster Digital Music SX at usb-0000:00:07.2-2, # cat /proc/asound/devices 0: [ 0] : control 16: [ 0- 0]: digital audio playback 17: [ 0- 1]: digital audio playback 24: [ 0- 0]: digital audio capture 33: : timer # cat /proc/asound/modules 0 snd_usb_audio # cat /proc/asound/pcm 00-00: USB Audio : USB Audio : playback 1 : capture 1 00-01: USB Audio : USB Audio #1 : playback 1 # cat /proc/asound/SX/pcm0p/info card: 0 device: 0 subdevice: 0 stream: PLAYBACK id: USB Audio name: USB Audio subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 1 subdevices_avail: 0 # cat /proc/asound/SX/pcm0p/sub0/hw_params access: MMAP_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 48000 (48000/1) period_size: 1024 buffer_size: 16384 # cat /proc/asound/SX/pcm0p/sub0/info card: 0 device: 0 subdevice: 0 stream: PLAYBACK id: USB Audio name: USB Audio subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 1 subdevices_avail: 0 # cat /etc/asound.conf pcm.!default { type rate slave { pcm "hw:0,0" rate 48000 } } ctl.!default { type hw card 0 } Here is the kernel logs when the device is plugged and recognized. The alsa drirver is configured with '--with-debug=verbose' options; -------- Jun 28 17:27:35 oboro kernel: usb 1-2: new full speed USB device using uhci_hcd and address 4 Jun 28 17:27:36 oboro kernel: usb 1-2: configuration #1 chosen from 1 choice Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:1: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:2: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:3: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:4: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:5: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:6: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:7: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:8: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2433: 4:1:9 : format type 0 is detected, processed as PCM Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:9: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2433: 4:1:10 : format type 0 is detected, processed as PCM Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:1:10: add audio endpoint 0x1 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:1: add audio endpoint 0x82 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:2: add audio endpoint 0x82 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:3: add audio endpoint 0x82 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:4: add audio endpoint 0x82 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:5: add audio endpoint 0x82 Jun 28 17:27:36 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:6: add audio endpoint 0x82 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:7: add audio endpoint 0x82 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:2835: 4:2:8: add audio endpoint 0x82 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [3] FU [PCM Playback Switch] ch = 1, val = 0/1/1 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [3] FU [PCM Playback Volume] ch = 2, val = -25600/0/128 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [4] FU [Headphone Playback Switch] ch = 1, val = 0/1/1 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:458: cannot set ctl value: req = 0x4, wValue = 0x201, wIndex = 0x400, type = 4, data = 0x40/0x0 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [4] FU [Headphone Playback Volume] ch = 2, val = -25600/0/128 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [6] FU [Headphone Playback Switch] ch = 1, val = 0/1/1 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:458: cannot set ctl value: req = 0x4, wValue = 0x201, wIndex = 0x600, type = 4, data = 0x40/0x0 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [6] FU [Headphone Playback Volume] ch = 2, val = -25600/0/128 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [8] FU [Headphone Playback Switch] ch = 1, val = 0/1/1 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1033: [9] FU [Digital In Playback Switch] ch = 1, val = 0/1/1 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1617: [7] SU [PCM Capture Source] items = 2 Jun 28 17:27:37 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbmixer.c:1777: status interrupt: c0 02 Jun 28 17:27:37 oboro kernel: usbcore: registered new interface driver snd-usb-audio -------- And when I invoked aplay to playback a wav file the log says -------- Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) Jun 28 17:31:05 oboro kernel: ALSA /usr/src/alsa-driver-1.0.20/usb/usbaudio.c:1360: setting usb interface 1:3 Jun 28 17:31:05 oboro kernel: snd: bad kfree (called from e1065ded) -------- |