Audigy 1 + Philips ADC

pzmt · Nov 5, 2003, 07:31 AM

Hi,

I am currently using Linux + ALSA drivers with my Audigy 1 player and last evening I found way how to use Philips ADC instead of AC97. It seems that emu10k1 driver developping is dead and maybe you are interested in this info.

Only thing you must do is set bit 8 in A_IOCFG register (alias 0x18)
A_IOCFG = A_IOCFG | 0x0080
this disables route from AC97 Line Out to front speakers.
Philips ADC is on input 0x4a and 0x4b of DSP.

pzmt

Max M. · Nov 5, 2003, 06:20 PM

[mymistakesorry - max]

**Eugene Gavrilov** · Nov 5, 2003, 08:46 PM

>> A_IOCFG = A_IOCFG | 0x0080
>> this disables route from AC97 Line Out to front speakers

thanks!
I'll have a look (unfortunately, I don't have 10k2 boards for testing anymore)

[ to kX Users: ]

unfortunately, adding such a feature would confuse users even more (the present 10k2 routing is difficult enough)
so, it will be kept 'undocumented' and will be controllable via kxctrl -shw at the moment...

>> but we always used ph.ads instead of ac97

not exactly

at least, the driver doesn't program 0x80 bit at all (unless the user switches spdif frequency)

so, we use 'regular' ac97 (labelled 'ac97') and 'philips adc' (labelled 'ac97 2'), but we don't turn off ac97->line_out routing (for 10k2.1)
that's why the usage of 'ac97.2' was limited
now this can give better line-in quality

/E

surealsurrender · Nov 13, 2003, 07:47 AM

Hi,

I have read that the Philips ADC used in 10k2 livedrive is 24bit... does bypassing AC97 mean that I could record true 24 bit straight off the ADC in my livedrive?? I would imagine this means you could not add FX, but I record all my sources dry anyway and add my FX later. I have seached around to find out more about this or if someone had already asked but nothing really conclusive. From the technical documents I have found (for as much as I can understand) 24bit analog recording might be possible.

If I'm way off here, sorry... don't know much about programming or code...

Sur

P.S. -- Stupid question, but is there anywhere the adventurous among us could find some information on "undocumented" features??.... I know.. they don't call them undocumented for nothing! lol

**Eugene Gavrilov** · Nov 15, 2003, 02:25 AM

24-bit recording is impossible for 10k1/10k2 boards
(but possible for audigy2 cards)

at least, we currently don't have any -real- ways of implementing this feature

/E

Nov 5, 2003, 07:31 AM	#1
pzmt DriverHeaven Junior Member Join Date: Aug 2003 Posts: 28 Rep Power: 0	Audigy 1 + Philips ADC Hi, I am currently using Linux + ALSA drivers with my Audigy 1 player and last evening I found way how to use Philips ADC instead of AC97. It seems that emu10k1 driver developping is dead and maybe you are interested in this info. Only thing you must do is set bit 8 in A_IOCFG register (alias 0x18) A_IOCFG = A_IOCFG \| 0x0080 this disables route from AC97 Line Out to front speakers. Philips ADC is on input 0x4a and 0x4b of DSP. pzmt

Nov 5, 2003, 06:20 PM	#2
Max M. h/h member-shmember Join Date: Dec 2002 Location: Evil Empire Posts: 2,639 Rep Power: 69	[mymistakesorry - max] __________________ Last edited by Max M.; Nov 5, 2003 at 08:57 PM.

Nov 5, 2003, 08:46 PM	#3
Eugene Gavrilov kX Project Lead Programmer and Coordinator Join Date: Dec 2002 Posts: 3,119 Rep Power: 75	>> A_IOCFG = A_IOCFG \| 0x0080 >> this disables route from AC97 Line Out to front speakers thanks! I'll have a look (unfortunately, I don't have 10k2 boards for testing anymore) [ to kX Users: ] unfortunately, adding such a feature would confuse users even more (the present 10k2 routing is difficult enough) so, it will be kept 'undocumented' and will be controllable via kxctrl -shw at the moment... >> but we always used ph.ads instead of ac97 not exactly at least, the driver doesn't program 0x80 bit at all (unless the user switches spdif frequency) so, we use 'regular' ac97 (labelled 'ac97') and 'philips adc' (labelled 'ac97 2'), but we don't turn off ac97->line_out routing (for 10k2.1) that's why the usage of 'ac97.2' was limited now this can give better line-in quality /E

Nov 13, 2003, 07:47 AM	#4
surealsurrender DriverHeaven Newbie Join Date: Dec 2002 Location: Ottawa, Ontario, Canada Posts: 19 Rep Power: 0	Hi, I have read that the Philips ADC used in 10k2 livedrive is 24bit... does bypassing AC97 mean that I could record true 24 bit straight off the ADC in my livedrive?? I would imagine this means you could not add FX, but I record all my sources dry anyway and add my FX later. I have seached around to find out more about this or if someone had already asked but nothing really conclusive. From the technical documents I have found (for as much as I can understand) 24bit analog recording might be possible. If I'm way off here, sorry... don't know much about programming or code... Sur P.S. -- Stupid question, but is there anywhere the adventurous among us could find some information on "undocumented" features??.... I know.. they don't call them undocumented for nothing! lol

Nov 15, 2003, 02:25 AM	#5
Eugene Gavrilov kX Project Lead Programmer and Coordinator Join Date: Dec 2002 Posts: 3,119 Rep Power: 75	24-bit recording is impossible for 10k1/10k2 boards (but possible for audigy2 cards) at least, we currently don't have any -real- ways of implementing this feature /E