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KnoppMyth R5A30.2 and btaudio
http://forum.linhes.org/viewtopic.php?f=2&t=8047		 Page 1 of 1
Author:  jasontech [ Sun Jan 22, 2006 9:52 pm ]
Post subject:  KnoppMyth R5A30.2 and btaudio
I am rebuilding my Mythbox. I had a customer get a new computer, and he gave me his old one. Its a P4 3.0Ghz, 1GB RAM, and a Radeon X700 PCI-E. I've got the NIC running with a kernel rebuild and skge downloaded from Marvell, and got the Radeon working with a deb from somewhere. The only problem I am having is with btaudio. I can see that since 2.6, btaudio has been dropped. It used to work for me in 2.4 (R4 something). I have 3 WinTV cards. I know btaudio works with them, because I had it working before. I've built a btaudio module from a download mentioned on KnoppMyth Wiki. I had to copy over the .ko module instead of the .o though. Anyway, the module loads fine:

Code:
btaudio: driver version 0.7 loaded [digital+analog]
btaudio: Bt878 (rev 17) at 02:00.1, irq: 16, latency: 64, mmio: 0xdfdfe000
btaudio: using card config "default"
btaudio: registered device dsp0 [digital]
btaudio: registered device dsp1 [analog]
btaudio: registered device mixer0
btaudio: Bt878 (rev 17) at 02:01.1, irq: 17, latency: 64, mmio: 0xdfdfc000
btaudio: using card config "default"
btaudio: registered device dsp2 [digital]
btaudio: registered device dsp3 [analog]
btaudio: registered device mixer1
btaudio: Bt878 (rev 17) at 02:02.1, irq: 18, latency: 64, mmio: 0xdfd00000
btaudio: using card config "default"
btaudio: registered device dsp4 [digital]
btaudio: registered device dsp5 [analog]
btaudio: registered device mixer2


I've created a /etc/modutils/btaudio/, and ran update-modules:

Code:
options bttv debug=2
options btaudio debug=2 digital=1 analog=0 rate=32000
pre-install btaudio modprobe snd-pcm-oss
post-install btaudio modprobe bttv
alias sound-slot-1 btaudio
alias sound-service-1-0 btaudio
alias sound-slot-2 btaudio
alias sound-service-2-0 btaudio
alias sound-slot-3 btaudio
alias sound-service-3-0 btaudio


I've also disabled the following from loading, as they just do NOT work with old cards (the part about dropping btaudio):

dst
dst_ca
snd_bt87x
dvb_bt8xx

Anyway, all of the dsp and mixer devices show up. However, I can not get any sound out of them. ALSA never sees them as cards. I want to use aplay to test the sound, but since ALSA doesn't recognize them, I guess that won't work. I've tried using XawTV and setting -C to /dev/dsp0 and dsp1. But still no sound. I've been searching Google and these forums for about 6 hours now, but have not had any luck. Has anyone else gotten btaudio to work on the new releases?

Thank you,
Jason Greb
Author:  jasontech [ Sun Jan 22, 2006 10:09 pm ]
Post subject: 
Not sure if this helps, but maybe:

Code:
/home/jgreb# sox -w -r 32000 -t ossdsp /dev/dsp1 -r 32000 -t ossdsp /dev/dsp
sox: Can't open output file '/dev/dsp': Device or resource busy


Not sure why I am getting that... how can I tell what is using the device?
Author:  Xsecrets [ Mon Jan 23, 2006 12:51 am ]
Post subject: 
I've never used btaudio, but I seem to remember a while back hearing that the name changed.
Author:  nickread [ Mon Jan 23, 2006 1:02 am ]
Post subject:  Re: KnoppMyth R5A30.2 and btaudio
jasontech wrote:
I had a customer get a new computer, and he gave me his old one. Its a P4 3.0Ghz, 1GB RAM, and a Radeon X700 PCI-E.


Nice customer :wink:
Author:  Xsecrets [ Mon Jan 23, 2006 1:06 am ]
Post subject:  Re: KnoppMyth R5A30.2 and btaudio
nickread wrote:
jasontech wrote:
I had a customer get a new computer, and he gave me his old one. Its a P4 3.0Ghz, 1GB RAM, and a Radeon X700 PCI-E.


Nice customer :wink:


no kidding if that's an old computer I need to start calling mine an antique.
Author:  jasontech [ Mon Jan 23, 2006 6:41 am ]
Post subject: 
Well, I don't consider it an old computer. Its got a bigger processor that both my computer and my laptop. (2.5 and 2.4 respectively). It's mostly been a PTA though. This is why I don't buy MSI boards. And the fan on the graphics card is dying, And when I put this motherboard into my old case (a converted Gateway desktop which does very well), I had to mod the case a little bit. I had to cut the opening in the back for the motherboard, and unfortuantely, until I can find a power supply with a back of 5" x 3", I am stuck with a 200W, with a hacked on P4 connector, and a motherboard that is supposed to have 24-pin, not 20. But so far, no smoke. I put pictures on my site, if anyone was interested (www.jasongreb.com).
Author:  jasontech [ Mon Jan 23, 2006 10:28 am ]
Post subject: 
Yay! I have sound. I found out what it was. First off, I took out the last tuner, as I was getting all kinds of kernel messages about it (I think it is a special PCI slot, as it is a different color). Anyway, when I did that and tried to Watch TV, it said the /dev/dsp was in use. Well, no artsd or esd running. So I investigated further. Turns out that /dev/dsp goes to /dev/dsp0. Well, btaudio was taking over dsp0. I had to change my preinstall to snd_pcm_oss, not snd-pcm-oss, and add that module to /etc/modules. After that, I have sound. Now to find out what is wrong with my last tuner.
Author:  jrjackso [ Sat Feb 11, 2006 10:22 pm ]
Post subject:  WinTV Go Plus working with btaudio under 5A30.2
Hi, thanks jasontech - this thread helped a lot..

I couldn't seem to get snd_bt87x to cooperate so I figured I'd give btaudio a try and it worked fine.

Just in case anyone else finds this helpful, these are the steps I followed:

- Built btaudio as per the Extract and compile instructions at http://knoppmythwiki.org/index.php?page=BTTV+BTAudio. I didn't follow steps 1, 2 and 3 from the wiki though.

- As you stated, make install puts btaudio.o in /lib/modules/2.6.13.2-chw-3/kernel/sound/oss. I rm'd this and copied btaudio.ko into this directory instead, then ran depmod -a. At this point, insmod/modprobe worked, but it didn't assign /dev/dsp*

- I created /etc/modutils/btaudio with the following:

Code:
options bttv debug=2
options btaudio debug=2 digital=1 analog=0 rate=32000
pre-install btaudio modprobe snd_pcm_oss
post-install btaudio modprobe bttv
alias sound-slot-1 btaudio
alias sound-service-1-0 btaudio


- Ran update-modules

- Commented out bt878, dst, dst_ca and dvb_bt8xx in /etc/modules and added snd_pcm_oss

- Rebooted.. dmesg | grep btaudio gave:

Code:
btaudio: driver version 0.7 loaded [digital+analog]
btaudio: Bt878 (rev 17) at 00:0d.1, irq: 10, latency: 64, mmio: 0xcfcff000
btaudio: using card config "default"
btaudio: registered device dsp1 [digital]
btaudio: registered device dsp2 [analog]
btaudio: registered device mixer1


- Ran mythtv-setup and chose /dev/dsp1 (digital). This didn't work, but as suggested at http://www.linuxtv.org/v4lwiki/index.php/Btaudio (i.e. "The analog mode of the btaudio driver should just work on any BT87x card"), I tried /dev/dsp2 (analog). After restarting the myth backend, I had Live TV audio without a patch cable on my WinTV Go Plus!

Anyhow, I hope someone finds all that useful ;)

jrj
Author:  jrjackso [ Sat Feb 18, 2006 3:55 pm ]
Post subject:  Follow-up
FYI, I find the audio directly off the tuner is rather "electronic" and of low quality. Using the tuner's line out is better IMO

-jrj
Author:  Irishcream [ Fri Feb 24, 2006 7:18 pm ]
Post subject: 
Does anyone know of a way to fix this electronic sound? or is it a card by card issue?
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