[mythtv-users] Another Audio Question, I need to figure this out

Sat May 31 11:49:43 EDT 2003

I am using oss drivers from sourceforge for emu10k1.  I am using the cvs
version not the latest release.  Works well.  I am using an SB Live 5.1
card.  I know that audigy support is built into cvs only, not on the
release.  I like the ability to switch on the fly what outputs I want to
use.  For MythTv for example, I route output to my TV speakers.  For
Mythmusic I route output to my digital speakers.  If you do get it to
work, emu10k1 will use up 2 dsp devices.  You must have these devices
already created.  If you are using Redhat, emu10k1 is built in as a
module but the tools are not available that will allow custom routing. 
Ac3 passthrough works as well.  

This is an excerpt from the mailing list from Rui Sousa

"

The problem is none of the drivers versions you mentioned (0.19 and
0.20) are supposed to support Audigy2 cards. Only the cvs mainline has
this support (still marked as 0.20a version). The Redhat kernel was
probably patched with cvs mainline changes but still shows and older
driver version.

In any case I don't think there is any really problem, except that I
still need to make an official release of the driver and bump the
version up to 0.21a...
"

Reading the rest of your post. It seems that our setup may be similar. 
I also use btaudio.  Here is a copy of my modules.conf if that helps you
out.  It is severely commented for my benefit.

Have Fun

On Fri, 2003-05-30 at 17:21, Chris Germano wrote: 
> Ok I'm kinda lost when it comes to setting up this audio for myth. Is there 
> any way of figuring out which input to set in setup for the capture card? I 
> mean I have things like /dev/dsp, /dev/dsp1, /dev/dspW,  /dev/sound/dsp, 
> etc. Likewise how do I know which one to use for playback? People keep 
> saying to use the btaudio drivers for inputting into the Wintv 401 capture 
> card, but what input would that be, i'm so lost.
> 
> My main problem is when I'm in KMix and I select my line in for recording 
> (as I hear audio on that input), and then I select mute, and it does not 
> mute. So that is pretty useless, is there some other way to mute linein? Is 
> this why OSS drivers don't work?
> 
> In terms of drivers I tried ALSA and my Audigy EMU10K2 chipset isn't 
> supported as of yet, so I tried to get the EMU10K1 (project on sourceforge) 
> from the site's and their CVS won't let me login, the project looks like its 
> dead I dont know how they added support for all the new creative cards when 
> it hasnt been modified this year. So in terms of drivers I'm stuck with OSS 
> I guess, I might have through the cheapo sound card in there.
> 
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# OSS device assignment as follows
# /dev/dsp0             SBLive sound device one
# /dev/dsp1             SBLive sound device two
# /dev/dsp2             CMedia 8738-M6
# /dev/dsp3             Btaudio ATI TV Wonder digital output (the only working output)
# /dev/dsp4             Btaudio ATI TV Wonder analog output (not working)
# /dev/dsp5             Btaudio ATI TV Wonder VE digital (not working)
# /dev/dsp6             Btaudio ATI TV Wonder VE analog (not working)
#  To effect this ordering of the devices, in rc.local use :
#  modprobe emu10k1 to assign /dev/dsp0 and /dev/dsp1
#  modprobe cmpci to assign /dev/dsp2
#  modprobe btaudio to assign btaudio to /dev/dsp3 /dev/dsp4 /dev/dsp5 /dev/dsp6
#  Make sure all these devices are previously created or else it will not work.
#  To make Mythtv use the SBlive
#  /dev/video0 will point to /dev/dsp3 (btaudio is used for ATI TV Wonder PCI)
#  /dev/video1 will point to /dev/dsp0 (sblive sound  device one  is used for ATI TV Wonder VE)
#  MythTV playback device is pointed to /dev/dsp0 (connected to the TV sound input)
#  The Digital output is connected to the ADA895 speakers using AC3 Passthrough
#  I use a custom version of emu-script which is specific to /dev/dsp0 and /dev/mixer0 devices.
#  The modification was to replace all instances of CONFIG with CONFIG -M /dev/mixer0 ( so as to use the 
#  sblive)  Also all instances of DSPMGR was replaced with DSPMGR -D /dev/dsp0 -M /dev/mixer0.
#  The initial assignment declaration for both these variables are not changed.  Somehow DSPDEV and MSPDEV 
#  will not take the   values -M and -D so this change was necessary.  
#  I am using the emu10k1.conf version with AC3 enabled.
#  This module.conf will not save aumix mixer changes so our .aumixrcem and .aumixrccm will never change   
#  from values  I selected.  I had to adjust volumes so volume will not change significantly when watching
#  videos recorded from different tuners.
#  /dev/dsp is symlink to /dev/dsp2.  /dev/mixer is symlink to /dev/mixer0 so all the other multimedia apps 
#  will have to  use the cmedia sound card including viavoice.   
#  Similary AUMIX_EXE was changed to AUMIX_EXE -d /dev/mixer0 (except the original declaration). I had it 
#  pointed to /etc/.aumixrcem instead of /dev/.aumixrc

# Parallel Port
# alias parport_lowlevel parport_pc

# LAN card
alias eth0 via-rhine

# USB Support
alias usb-controller ehci-hcd
alias usb-controller1 usb-uhci

# OSS/Free portion
alias sound-slot-0 emu10k1
post-install emu10k1 /bin/aumix-minimal -f /etc/.aumixrcem -d /dev/mixer0 -L >/dev/null 2>&1 || :
#pre-remove sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrcem -d /dev/mixer0 -S >/dev/null 2>&1 || :

alias sound-slot-1 cmpci
pre-install cmpci modprobe emu10k1
post-install cmpci /bin/aumix-minimal -f /etc/.aumixrccm -d /dev/mixer1 -L >/dev/null 2>&1 || :
#pre-remove sound-slot-1 /bin/aumix-minimal -f /etc/.aumixrccm -d /dev/mixer1 -S >/dev/null 2>&1 || :

# i2c
alias char-major-89   i2c-dev
options i2c-core      i2c_debug=1
options i2c-algo-bit  bit_test=1

# TV Tuners
alias char-major-81 videodev
alias char-major-81-0 bttv
pre-install bttv modprobe -k msp3400; modprobe -k tuner
options tuner type=2
alias char-major-81-1 bttv

# Btaudio 
pre-install btaudio modprobe cmpci
alias sound-slot-2 btaudio

# NVIDIA Graphics card
#alias char-major-10-175 agpgart
#options agpgart agp_try_unsupported=1
alias char-major-195 nvidia
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