[mythtv-users] Cannot record/hear sound (line in muted, recording source set)

Alex Wilbur alex at neuon.com
Mon Mar 10 22:18:51 EST 2003


Hi,

Rather frustrated! 

I'm literally pulling my hair out now after an afternoon of frustration,
which must be surely down to my incompetency!

Sorry this is so long, but I hope somebody might have some idea what's
wrong if I provided enough contextual info.

I've done pretty well thus far to get everything kind of working. I'm
using

- RedHat8, 2.4.18-26.8
- Hercules SmartTV Stereo (working with XawTV, sound and video)
- mythtv (CVS, from earlier this morning)
- alsa sound drivers (0.9.0rc8c)
- KDE 3.0.3-8RedHat (duplex disabled, or else mythtv 'watch live tv'
hangs with no video or sound)
- SoundBlaster Live Value (5.1)

I had a hack about this morning and added support for tv_grab_fi into
the setup and filldatabase and I thought I was going great guns when I
managed to get a picture in myth.

But alas, now I've run into trouble.

I can get sound and audio in XawTV but of course, that's going the
analogue route.

I have myth up and running and I'm able to watch livetv, but of course,
its playing the sound from the analogue input. So following the docs and
the faq, I muted the line in, set it as the recording source, fired up
xawtv and then tried running aplay /dev/dsp in another terminal window,
but I get a bunch of output (but no sound:)

[...alex]$ aplay /dev/dsp0
Playing raw data '/dev/dsp0' : Unsigned 8 bit, Rate 8000 Hz, Mono
xrun!!! (at least 12.697 ms long)
xrun!!! (at least 9.481 ms long)
xrun!!! (at least 11.871 ms long)
xrun!!! (at least 11.822 ms long)
xrun!!! (at least 11.863 ms long)
xrun!!! (at least 11.846 ms long)
xrun!!! (at least 11.862 ms long)
xrun!!! (at least 11.821 ms long)
xrun!!! (at least 11.859 ms long)
xrun!!! (at least 11.842 ms long)

I've tried Btaudio too, but I don't really understand how to configure
it correctly (or even if its compatible with my setup).

I can play sound okay using aplay.

I cannot record sound using that basic KDE wav file recording app. If I
start it recording (even when Line is the recording source) it doesn't
record anything. Muted or otherwise, it still doesn't record.

Not sure if its related, but I currently have to su to root and then
modprobe tvaudio every time I boot up in order to get even analogue tv
sound. I tried adding "alias tvaudio" to my /etc/modules.conf but that
doesn't seem to be doing the trick.

I've played with all the mixer settings (using alsamixer) but I can't
work out what's wrong. Here's the amixer output

Simple mixer control 'Master',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]
Simple mixer control 'Master Mono',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 31
  Mono: Playback 31 [100%] [on]
Simple mixer control 'Headphone LFE',1
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Headphone',1
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 100
  Front Left: Playback 100 [100%]
  Front Right: Playback 100 [100%]
Simple mixer control 'Headphone Center',1
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Tone',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]
Simple mixer control 'Bass',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Limits: 0 - 40
  Mono: 6 [15%]
  Front Left:
  Front Right:
Simple mixer control 'Treble',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Limits: 0 - 40
  Mono: 7 [18%]
  Front Left:
  Front Right:
Simple mixer control '3D Control - Switch',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control '3D Control Sigmatel - Depth',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Limits: 0 - 3
  Mono: 3 [100%]
Simple mixer control '3D Control Sigmatel - Rear Depth',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Limits: 0 - 3
  Mono: 3 [100%]
Simple mixer control 'PCM',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]
Simple mixer control 'PCM Out Path & Mute',0
  Capabilities:
  Mono:
Simple mixer control 'Surround',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]
Simple mixer control 'Surround Digital',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 98 [98%] Capture 100 [100%] [off]
  Front Right: Playback 98 [98%] Capture 100 [100%] [off]
Simple mixer control 'Center',0
  Capabilities: pvolume pvolume-joined
  Playback channels: Mono
  Limits: Playback 0 - 100
  Mono: Playback 100 [100%]
Simple mixer control 'LFE',0
  Capabilities: pvolume pvolume-joined
  Playback channels: Mono
  Limits: Playback 0 - 100
  Mono: Playback 100 [100%]
Simple mixer control 'Wave',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 100 [100%] Capture 100 [100%] [off]
  Front Right: Playback 100 [100%] Capture 100 [100%] [off]
Simple mixer control 'Wave Center',0
  Capabilities: pvolume pvolume-joined
  Playback channels: Mono
  Limits: Playback 0 - 100
  Mono: Playback 100 [100%]
Simple mixer control 'Wave LFE',0
  Capabilities: pvolume pvolume-joined
  Playback channels: Mono
  Limits: Playback 0 - 100
  Mono: Playback 100 [100%]
Simple mixer control 'Wave Surround',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 100
  Front Left: Playback 100 [100%]
  Front Right: Playback 100 [100%]
Simple mixer control 'Music',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 100 [100%] Capture 0 [0%] [off]
  Front Right: Playback 100 [100%] Capture 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 LiveDrive',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 100 [100%] Capture 100 [100%] [off]
  Front Right: Playback 100 [100%] Capture 100 [100%] [off]
Simple mixer control 'Line LiveDrive',1
  Capabilities: pvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100
  Front Left: Playback 100 [100%] Capture [off]
  Front Right: Playback 100 [100%] Capture [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 31 [100%] [on] Capture [off]
  Front Right: Playback 31 [100%] [on] 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 31 [100%] [on]
  Front Left: Capture [off]
  Front Right: Capture [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 31 [100%] [on] Capture [off]
  Front Right: Playback 31 [100%] [on] 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 31 [100%] [on]
  Front Left: Capture [off]
  Front Right: Capture [off]
Simple mixer control 'IEC958 Coaxial',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 100 [100%] Capture 100 [100%] [off]
  Front Right: Playback 100 [100%] Capture 100 [100%] [off]
Simple mixer control 'IEC958 Optical',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 100 [100%] Capture 100 [100%] [off]
  Front Right: Playback 100 [100%] Capture 100 [100%] [off]
Simple mixer control 'IEC958 Optical Raw',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Front Left: Playback [off]
  Front Right: Playback [off]
Simple mixer control 'IEC958 TTL',0
  Capabilities: pvolume cvolume cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 100 [100%] Capture 100 [100%] [off]
  Front Right: Playback 100 [100%] Capture 100 [100%] [off]
Simple mixer control 'PC Speaker',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 15
  Mono: Playback 15 [100%] [on]
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 31 [100%] [on] Capture [off]
  Front Right: Playback 31 [100%] [on] 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 15 [100%] [off]
  Front Right: Capture 15 [100%] [off]
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 'AC97',0
  Capabilities: pvolume cvolume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 100 Capture 0 - 100
  Front Left: Playback 0 [0%] Capture 100 [100%]
  Front Right: Playback 0 [0%] Capture 100 [100%]
Simple mixer control 'External Amplifier Power Down',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'SB Live Analog/Digital Output Jack',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Sigmatel Surround',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]

Also, here's an lsmod (not sure what others I could post to help)

Module                  Size  Used by    Not tainted
snd-pcm-oss            44932   0  (autoclean)
tvaudio                15836   2 
tuner                  12608   1  (autoclean)
bttv                   83104   0  (autoclean)
i2c-algo-bit            8840   1  (autoclean) [bttv]
i2c-core               19268   0  (autoclean) [tvaudio tuner bttv
i2c-algo-bit]
videodev                8352   3  (autoclean) [bttv]
sr_mod                 18168   0  (autoclean)
snd-mixer-oss          16440   1  (autoclean) [snd-pcm-oss]
radeon                 94040  19 
agpgart                42976   3 
snd-emu10k1-synth       5980   0  (unused)
snd-emux-synth         34268   0  [snd-emu10k1-synth]
snd-seq-midi-emul       7164   0  [snd-emux-synth]
snd-seq-virmidi         5096   0  [snd-emux-synth]
snd-seq-midi-event      5704   0  [snd-seq-virmidi]
snd-seq                46960   0  [snd-emux-synth snd-seq-midi-emul
snd-seq-virmidi snd-seq-midi-event]
snd-emu10k1            82004   1  [snd-emu10k1-synth]
snd-pcm                82304   0  [snd-pcm-oss snd-emu10k1]
snd-timer              19624   0  [snd-seq snd-pcm]
snd-rawmidi            18592   0  [snd-seq-virmidi snd-emu10k1]
snd-ac97-codec         44352   0  [snd-emu10k1]
snd-hwdep               6976   0  [snd-emu10k1]
snd-util-mem            3080   0  [snd-emux-synth snd-emu10k1]
snd-page-alloc          8688   0  [snd-emu10k1 snd-pcm]
snd-seq-device          6300   0  [snd-emu10k1-synth snd-emux-synth
snd-seq snd-emu10k1 snd-rawmidi]
snd                    43684   0  [snd-pcm-oss snd-mixer-oss
snd-emux-synth snd-seq-virmidi snd-seq-midi-event snd-seq snd-emu10k1
snd-pcm snd-timer snd-rawmidi snd-ac97-codec snd-hwdep snd-util-mem
snd-seq-device]
soundcore               6500   8  [bttv snd]
autofs                 13348   0  (autoclean) (unused)
3c59x                  30608   1 
ipt_REJECT              3736   2  (autoclean)
iptable_filter          2444   1  (autoclean)
ip_tables              14904   2  [ipt_REJECT iptable_filter]
ide-scsi               10544   0 
scsi_mod              107176   2  [sr_mod ide-scsi]
ide-cd                 33608   0 
cdrom                  33728   0  [sr_mod ide-cd]
ohci1394               20076   0  (unused)
ieee1394               46988   0  [ohci1394]
nls_iso8859-1           3516   2  (autoclean)
nls_cp437               5148   2  (autoclean)
vfat                   13084   2  (autoclean)
fat                    38744   0  (autoclean) [vfat]
mousedev                5524   1 
keybdev                 2976   0  (unused)
hid                    22276   0  (unused)
input                   5920   0  [mousedev keybdev hid]
usb-uhci               26188   0  (unused)
usbcore                77088   1  [hid usb-uhci]
ext3                   70336   1 
jbd                    52212   1  [ext3]

Please somebody help! ;-)

Regards




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