[mythtv-users] No input sound on PVR-250

[Ryan Allen]

This sounds a lot like my problem I just resolved last night.  I think
you even posted on the thread on mysettopbox.tv  

Anyhow, here is a link to the discussion and what I had to do to fix it.

Good luck!  I hope your problem is the same as mine.  Keep me informed!

- Ryan

http://mysettopbox.tv/phpBB2/viewtopic.php?t=1777

* John OKeefe <john at terminalreality.com> wrote on [06-21-04y 14:09]:
>  When I try to record a T.V. show or watch Live T.V. in
>  KnoppMyth R4V4 I hear no sound. Here is the system I
>  have
>  
>  PVR-250 with DirectTV satellite TV-Out COAX connected
>  to the COAX in on the PVR-250.
>  VIA AC97 sound out connected to headphones.
>  P4 1.4Ghz
>  Elite P4VMXS motherboard
>  1GB ram
>  
>  These are the steps I have tried to resolve the
>  problem: 
>  
>  (1) I played a MP3 to verify it was not my sound out
>  that was not working. I heard sound, so my sound out
>  is working great. Sound out is coming from AC97 on
>  board audio. 
>  (2) I ran alsamixer and made sure that all channels
>  had volume and that none of the channels had MM (mute)
>  above them. 
>  (3) I ran mythtv-setup and tried all the different
>  sound processor options i.e. dsp, dsp0, dsp1, dsp2,
>  and dsp3. 
>  (4) I tried test_ioctl and made sure that volume was
>  65000 and mute was 0. 
>  (5) I tried the following: 
>  
>  Code: 
>  
>  cd /usr/src 
>  # The ivtv compile needs the src files. 
>  tar xvfj linux-2.4.25-chw.tar.bz2 
>  
>  cd /usr/local/lib/ivtv/driver 
>  make clean 
>  # I suppose I could have used "make install" but I was
>  testing 
>  # and didn"t want to add to my problems. 
>  make 
>  
>  cp msp3400.o
>  /lib/modules/2.4.25-chw/kernel/drivers/media/video/ 
>  # And answer yes to overwrite the existing file. 
>   
>  I tried mplayer /dev/video0
>  
>  When I played Mplayer I noticed the following two
>  items displayed:
>  
>  MPEG: No audio stream found -> no sound 
>  
>  and later on down 
>  
>  Audio: no sound  
>  
>  I also tried a couple of the following:
>  
>  test_ioctl -v input=X,output=Y 
>  
>  Where X and Y are numbers that I try differently each
>  time. I have no clue what numbers to use, what range
>  of numbers to use, and if I need to reboot each time
>  or not.
>  
>  Is there anyway to check and see what dsp my PVR-250
>  is using i.e. dsp, dsp0, dsp1, etc. without having to
>  guess? 
>  
>  Each time I change the dsp using mythtv-setup do I
>  need to reboot? 
>  
>  How can I verify that there are no other msp3400.o
>  files and that the right one is loading?
>  
>  When running Mplayer does the "MPEG: No audio stream
>  found -> no sound" line give any tips as to what might
>  be going wrong?
>  
>  Is there anything else I should try or that I missed
>  to get sound input working? 
>  
>  Any help would be much appreciated! I am so close to
>  being able to record shows on my KnoppMyth box. 
>  
>  Also I am a super Linux novice so if you give any
>  instructions please be detailed as I may not
>  understand the command to do what you are asking me to
>  do.
>  
>  Best Regards, 
>  John

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