Hello, Want to use OSS emulation through /dev/dsp for playing wav files. As a simple test to start with I attempt the following:-
cat sound.wav > /dev/dsp The output I get is as follows:- ALSA sound/usb/usbaudio.c:1324: setting usb interface 1:1 ALSA sound/usb/usbaudio.c:670: cannot submit urb (err = -45) All I get out of the headphones is a clicking noise. (C-Media usb headphones). The kernel configuration I am using includes:- CONFIG_SND CONFIG_SND_SEQUENCER CONFIG_SND_MIXER_OSS CONFIG_SND_PCM_OSS CONFIG_SND_PCM_OSS_PLUGINS CONFIG_SND_SEQUENCER_OSS CONFIG_SND_SUPPORT_OLD_API CONFIG_SND_VERBOSE_PROCFS CONFIG_SND_VERBOSE_PRINTK CONFIG_SND_DEBUG CONFIG_SND_DEBUG_DETECT CONFIG_SND_PRIME CONFIG_OSS_OBSOLETE cat /proc/asound/devices gives:- 0: [ 0] : control 1: : sequencer 16: [ 0- 0]: digital audio playback 24: [ 0- 0]: digital audio capture 33: : timer Dmesg gives the following information:- MXC PCTL driver initilized. INTQ IRQ# 110 PLOST IRQ# 128 input: C-Media USB Audio Device as /class/input/input2 input: USB HID v1.00 Device [C-Media USB Audio Device ] on usb-fsl-ehci.2-1 usbcore: registered new interface driver usbhid drivers/hid/usbhid/hid-core.c: v2.6:USB HID core driver Advanced Linux Sound Architecture Driver Version 1.0.14 (Thu May 31 09:03:25 2007 UTC). ALSA sound/usb/usbaudio.c:2753: 2:1:1: add audio endpoint 0x1 ALSA sound/usb/usbaudio.c:2753: 2:2:1: add audio endpoint 0x82 ALSA sound/usb/usbmixer.c:989: [9] FU [PCM Playback Switch] ch = 1, val = 0/1/1 ALSA sound/usb/usbmixer.c:406: cannot set ctl value: req = 0x4, wValue = 0x201, wIndex = 0x900, type = 4, data = 0x18/0x0 ALSA sound/usb/usbmixer.c:989: [9] FU [PCM Playback Volume] ch = 2, val = -7264/-16/48 ALSA sound/usb/usbmixer.c:989: [10] FU [Mic Capture Switch] ch = 1, val = 0/1/1 ALSA sound/usb/usbmixer.c:406: cannot set ctl value: req = 0x4, wValue = 0x200, wIndex = 0xa00, type = 4, data = 0x18/0x0 ALSA sound/usb/usbmixer.c:989: [10] FU [Mic Capture Volume] ch = 1, val = 0/6096/384 ALSA sound/usb/usbmixer.c:989: [10] FU [Auto Gain Control] ch = 1, val = 0/1/1 usbcore: registered new interface driver snd-usb-audio ALSA device list: #0: C-Media USB Audio Device at usb-fsl-ehci.2-1, full speed Does anyone know what the problem might be with this. Would appreciate any assistance. Merry Christmas Geoff Crowther
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