On 07/24/2012 10:21 PM, Mark Brown wrote:
On Tue, Jul 24, 2012 at 03:46:38PM +0300, Lauri Hintsala wrote:
- Recorded audio file is totally silent. Hexdump shows zeros.
This one is commonly due to devices powering up muted by default and requiring that you set some controls to route the audio through - are you sure you've not missed anything there?
I tried to set gains and other settings with alsamixer. I didn't see any options for muting. Here is the output of amixer.
$ amixer Simple mixer control 'Headphone',0 Capabilities: pvolume penum Playback channels: Front Left - Front Right Limits: Playback 0 - 127 Mono: Front Left: Playback 122 [96%] [9.50dB] Front Right: Playback 122 [96%] [9.50dB] Simple mixer control 'Headphone Mux',0 Capabilities: enum Items: 'DAC' 'LINE_IN' Item0: 'LINE_IN' Simple mixer control 'Headphone Playback ZC',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Simple mixer control 'PCM',0 Capabilities: pvolume penum Playback channels: Front Left - Front Right Limits: Playback 0 - 192 Mono: Front Left: Playback 173 [90%] Front Right: Playback 173 [90%] Simple mixer control 'Mic',0 Capabilities: volume volume-joined penum Playback channels: Mono Capture channels: Mono Limits: 0 - 4 Mono: 2 [50%] [30.00dB] Simple mixer control 'Capture',0 Capabilities: cvolume penum Capture channels: Front Left - Front Right Limits: Capture 0 - 15 Front Left: Capture 14 [93%] Front Right: Capture 14 [93%] Simple mixer control 'Capture Attenuate Switch (-6dB)',0 Capabilities: volume volume-joined penum Playback channels: Mono Capture channels: Mono Limits: 0 - 2 Mono: 2 [100%] Simple mixer control 'Capture Mux',0 Capabilities: enum Items: 'MIC_IN' 'LINE_IN' Item0: 'LINE_IN' Simple mixer control 'Capture ZC',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on]
The testing is not currently very reasonable. I have to reboot my machine after every single recording because of "busy" bug.
Regards, Lauri