[mythtv-users] whiney noise

Dane Kantner webmaster at cmtweb.com
Wed Jul 23 19:09:43 EDT 2003


I have an installation here thats working fairly well, except for a pretty
big sound issue.  I'm using Alsa and mandrake 9.1... and a prolink pixelview
playtv pro card bt878.  The sound in xawtv is perfect, but in mythtv it only
comes out my left speaker, and worse yet theres a really loud whiney buzz
sound.  I'm just using /dev/dsp with my line in port.... its supposed to be
stereo, and the jumper cable is stereo...

In setup, I turned the audio sampling rate to "none" --changing it to
anything other than this actually causes it to not output any sound.

Any ideas greatly appreciated :)

-Dane

If interested, here is my output from amixer:


Simple mixer control 'Master',0

Capabilities: pvolume pswitch pswitch-joined

Playback channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 18 [58%] [on]

Front Right: Playback 18 [58%] [on]

Simple mixer control 'Master Mono',0

Capabilities: pvolume pvolume-joined pswitch pswitch-joined

Playback channels: Mono

Limits: Playback 0 - 31

Mono: Playback 0 [0%] [off]

Simple mixer control '3D Control - Center',0

Capabilities: volume volume-joined

Playback channels: Mono

Limits: 0 - 15

Mono: 0 [0%]

Simple mixer control '3D Control - Depth',0

Capabilities: volume volume-joined

Playback channels: Mono

Limits: 0 - 15

Mono: 0 [0%]

Simple mixer control '3D Control - Switch',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'PCM',0

Capabilities: pvolume pswitch pswitch-joined

Playback channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 29 [94%] [on]

Front Right: Playback 29 [94%] [on]

Simple mixer control 'Surround',0

Capabilities: pvolume pswitch

Playback channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 0 [0%] [off]

Front Right: Playback 0 [0%] [off]

Simple mixer control 'Surround Down Mix',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'Center',0

Capabilities: pvolume pvolume-joined pswitch pswitch-joined

Playback channels: Mono

Limits: Playback 0 - 31

Mono: Playback 31 [100%] [off]

Simple mixer control 'Center/LFE Down Mix',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'LFE',0

Capabilities: pvolume pvolume-joined pswitch pswitch-joined

Playback channels: Mono

Limits: Playback 0 - 31

Mono: Playback 0 [0%] [off]

Simple mixer control 'Line',0

Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-joined
cswitch-exclusive

Capture exclusive group: 0

Playback channels: Front Left - Front Right

Capture channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 31 [100%] [off] Capture [on]

Front Right: Playback 31 [100%] [off] Capture [on]

Simple mixer control 'Line-In As Surround',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'CD',0

Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-joined
cswitch-exclusive

Capture exclusive group: 0

Playback channels: Front Left - Front Right

Capture channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 0 [0%] [off] Capture [off]

Front Right: Playback 0 [0%] [off] Capture [off]

Simple mixer control 'Mic',0

Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
cswitch-joined cswitch-exclusive

Capture exclusive group: 0

Playback channels: Mono

Capture channels: Front Left - Front Right

Limits: Playback 0 - 31

Mono: Playback 0 [0%] [off]

Front Left: Capture [off]

Front Right: Capture [off]

Simple mixer control 'Mic As Center/LFE',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'Mic Boost (+20dB)',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'Mic Select',0

Capabilities:

Mono:

Simple mixer control 'Video',0

Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-joined
cswitch-exclusive

Capture exclusive group: 0

Playback channels: Front Left - Front Right

Capture channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 0 [0%] [off] Capture [off]

Front Right: Playback 0 [0%] [off] Capture [off]

Simple mixer control 'Phone',0

Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
cswitch-joined cswitch-exclusive

Capture exclusive group: 0

Playback channels: Mono

Capture channels: Front Left - Front Right

Limits: Playback 0 - 31

Mono: Playback 0 [0%] [off]

Front Left: Capture [off]

Front Right: Capture [off]

Simple mixer control 'IEC958',0

Capabilities: pswitch pswitch-joined cswitch cswitch-joined

Playback channels: Mono

Capture channels: Mono

Mono: Playback [on] Capture [off]

Simple mixer control 'IEC958 Input Monitor',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'IEC958 Output',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'IEC958 Playback AC97-SPSA',0

Capabilities: volume volume-joined

Playback channels: Mono

Limits: 0 - 3

Mono: 0 [0%]

Simple mixer control 'PC Speaker',0

Capabilities: pvolume pvolume-joined pswitch pswitch-joined

Playback channels: Mono

Limits: Playback 0 - 15

Mono: Playback 0 [0%] [off]

Simple mixer control 'Aux',0

Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-joined
cswitch-exclusive

Capture exclusive group: 0

Playback channels: Front Left - Front Right

Capture channels: Front Left - Front Right

Limits: Playback 0 - 31

Front Left: Playback 0 [0%] [off] Capture [off]

Front Right: Playback 0 [0%] [off] Capture [off]

Simple mixer control 'Mono Output Select',0

Capabilities:

Mono:

Simple mixer control 'Capture',0

Capabilities: cvolume cswitch cswitch-joined

Capture channels: Front Left - Front Right

Limits: Capture 0 - 15

Front Left: Capture 0 [0%] [on]

Front Right: Capture 0 [0%] [on]

Simple mixer control 'Mix',0

Capabilities: cswitch cswitch-joined cswitch-exclusive

Capture exclusive group: 0

Capture channels: Front Left - Front Right

Front Left: Capture [off]

Front Right: Capture [off]

Simple mixer control 'Mix Mono',0

Capabilities: cswitch cswitch-joined cswitch-exclusive

Capture exclusive group: 0

Capture channels: Front Left - Front Right

Front Left: Capture [off]

Front Right: Capture [off]

Simple mixer control 'Analog to IEC958 Output',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'Duplicate Front',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'Exchange Center/LFE',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'External Amplifier Power Down',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'Input Source Select',0

Capabilities:

Mono:

Simple mixer control 'Input Source Select',1

Capabilities:

Mono:

Simple mixer control 'Swap Surround Slot',0

Capabilities: pswitch pswitch-joined

Playback channels: Mono

Mono: Playback [off]

Simple mixer control 'VIA DXS',0

Capabilities: pvolume

Playback channels: Front Left - Front Right

Limits: Playback 0 - 255

Front Left: Playback 0 [0%]

Front Right: Playback 0 [0%]





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