Hello Dan!
Now it's working! Sound is comming to my receiver via optical!! I've
tested only 5min now, just got some problems I'm trying to solve.
1) Any gstreamer application send sound with wrong sampling rate (Same
as audacious ressampling to 48khz, but gstremer seems to ressample to
48khz even 44.1khz music, tested with Totem), so i'm looking a way to
send only 44.1khz.
2) Audacious is perfect.
3) Couldn't send Mplayer ac3 passtrough, I'm trying to send via Totem
(or other command to mplayer), working on it....
Update: Just got sound via mplayer, but the passtrough is the same
garbled sound as in windows with 32/24bit enabled). Anyone know how
to send only 16bit stream passtrough via mplayer/alsa? Or any idea how
to solve? Must there be a way... we are so close to make this thing
100% working, it will be the best low price external sound card with
spdif for linux!
___________________
Fabrício Nihues
2009/5/25 Dan Allongo <gongo2k1@xxxxxxxxx>:
> I did some more USB packet sniffing and discovered that the drivers are
> setting 2 extra undocumented registers and some unknown bits in the existing
> registers.
> Try this out and let me know how it goes.
> I'm trying not to post all of this code to the list immediately in order to
> avoid confusion.
> If this works out, then I'll have to split off the boot quirk for this into
> a separate function due to the extra registers that CM6206 has.
> All I can say is that after these changes the analog channels still
> function.
> Honestly, I don't know that I can do too much more on this because I'm
> working on the assumption that the driver detects and properly handles the
> SPDIF device on this chip, which after looking at the code a little more,
> I'm not sure that it actually does...
> My coding skills are not strong enough to write that sort of code,
> especially since I don't actually have any background in audio sub-systems.
> I guess I just got lucky on this one with the registers being easy enough to
> identify.
>
> static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
> {
> /*
> * Set registers to defaults:
> * Clear SPDIF-out parameters
> * Enable DACx2, PLL binary, Soft Mute, and SPDIF-out
> * Enable line-out driver mode, set headphone source to front
> * channels, enable stereo mic.
> * Enable all channels and select 48-pin chipset
> */
> return snd_usb_cm106_write_int_reg(dev, 0, 0x200c) +
> snd_usb_cm106_write_int_reg(dev, 1, 0x3000) +
> snd_usb_cm106_write_int_reg(dev, 2, 0xf800) +
> snd_usb_cm106_write_int_reg(dev, 3, 0x143f) +
> snd_usb_cm106_write_int_reg(dev, 4, 0x0000) +
> snd_usb_cm106_write_int_reg(dev, 5, 0x3000);
> }
>
>
> Thanks for helping out with this, it's really great that you're able to give
> me feedback very quickly.
> ---Dan
>
>
>
> On Sun, May 24, 2009 at 3:30 PM, Fabrício Nihues <fabricio.nihues@xxxxxxxxx>
> wrote:
>>
>> Hello, I've tried again on windows, and spdif passtrough is working
>> with dts/ac3 files if you send it as 16 bit output, if sending as 24
>> bit or 32 bit I get noise, but the passtrough is working all the 5.1
>> channels, the receiver recognize dts and ac3 even if the analog out is
>> set to 2 Ch on the driver control panel. The only thing that enable or
>> disables the optical out is that switch in the cmedia control panel
>> inside windows.
>>
>> If is there something I can do please tell, I'll try to do, I can only
>> test tomorrow.
>>
>> ___________________
>> Fabrício Nihues
>>
>>
>>
>> 2009/5/24 Dan Allongo <gongo2k1@xxxxxxxxx>:
>> > Okay, well, if SPDIF out didn't work with the settings I sent out, then
>> > I
>> > really don't know what else to do for it since I'm only stabbing in the
>> > dark
>> > here.
>> > Besides, everything I'm reading seems to imply that the optical out is
>> > only
>> > 2-channel stereo anyway on most of these "budget" chips and they only do
>> > surround sound in analog.
>> >
>> > Surround 5.1 does indeed swap cen/lfe with rear outputs, but switching
>> > to
>> > surround 4.0 properly down-mixes to rear channels (and being that I only
>> > have a 4.0 system at home, this works for me).
>> > Before I submit a patch for this, I'll need someone with a CM106
>> > TurtleBeach
>> > device to check that everything still works okay.
>> > I'm setting the registers to default for a 7.1 card using the 48-pin
>> > chip as
>> > per the datasheet with the only deviation of turning on the Line Out
>> > driver
>> > as well (which was already there in the existing "quirk" for the CM106).
>> > Once I get some feedback from CM106 users, I'll submit the patch.
>> >
>> >
>> > --- usbaudio.c 2009-05-06 03:06:04.000000000 -0400
>> > +++ usbaudio.c 2009-05-24 11:07:44.000000000 -0400
>> > @@ -3273,10 +3273,17 @@
>> > static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
>> > {
>> > /*
>> > + * Set registers to defaults:
>> > + * Clear SPDIF-out parameters
>> > + * Enable DACx2, PLL binary, Soft Mute, and SPDIF-out
>> > * Enable line-out driver mode, set headphone source to front
>> > * channels, enable stereo mic.
>> > + * Enable all channels and select 48-pin chipset
>> > */
>> > - return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
>> > + return snd_usb_cm106_write_int_reg(dev, 0, 0x0000) +
>> > + snd_usb_cm106_write_int_reg(dev, 1, 0xb000) +
>> > + snd_usb_cm106_write_int_reg(dev, 2, 0x8004) +
>> > + snd_usb_cm106_write_int_reg(dev, 3, 0x007f);
>> > }
>> >
>> >
>> > @@ -3560,7 +3567,8 @@
>> > }
>> >
>> > /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
>> > - if (id == USB_ID(0x10f5, 0x0200)) {
>> > + /* C-Media CM6206 / CM106-Like Sound Device */
>> > + if (id == USB_ID(0x10f5, 0x0200) || id == USB_ID(0x0d8c, 0x0102)) {
>> > if (snd_usb_cm106_boot_quirk(dev) < 0)
>> > goto __err_val;
>> > }
>> >
>> >
>> >
>> >
>> > On Sat, May 23, 2009 at 10:52 AM, Paolo Saggese <pmsa4-alsa@xxxxxxxx>
>> > wrote:
>> >>
>> >> On Saturday 23 May 2009, Fabrício Nihues wrote:
>> >>
>> >> > The light of optical is on now... but don't send sound again... I'm
>> >> > sending to iec958:CARD=default,DEV=0 or spdif:CARD=default,DEV=0, on
>> >> > both I don't hear sound. And, if I change the receiver to my analog
>> >>
>> >> try plughw:0,1 as the spdif out device.
>> >>
>> >> Also experiment with settings on alsamixer.
>> >>
>> >> Ciao,
>> >> Paolo.
>> >>
>> >> --
>> >> Skype: Paolo.Saggese
>> >> http://borex.lngs.infn.it/saggese
>> >> You can still escape from the GATES of hell: Use Linux!
>> >>
>> >>
>> >>
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>> >
>> >
>> >
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>
>
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