Hi,
Last evening I found way how to use Philips ADC instead of AC97 on Audigy 1.
Attached patch is tested only on Audigy 1 player (not tested on Audigy 1 Platinium, Audigy 1 Platinium EX, Audigy 2, Audigy 2 Platinium, Audigy 2 Platinium EX), but I think it should work for all Audigy 1 and Audigy 2 cards, can some one test it ???
Modification:
- disable routing from AC97 line out to front speakers.
- AC97 ADC is used only for Mic playback and recording
- Philips ADC is used for other analog playback and recording (Analog Mix Playback Volume, Analog Mix Capture Volume)
- removes unused AC97 controls (is phone used ???)
Advantage:
- better Line In, Analog CD, Aux sound quality playback and recording (I hope that Philips ADC is better than old AC97 ADC)
- similiar mixer as used on Windows
- simpler mixer
- you doesn't need set capture source to be able listen or record analog sources - I think this was confusing for many users
- fixed small bug in MIC ADC buffer recording (alias device 1 - 16 bit 8000 Hz mono)
TODO:
It seems that Audigy 1 can do 24 bit/48kHz recording (and I think 24 bit /48 kHz playback too) using TRAM playback and capture. Philips ADC is connected to DSP and trasmit to DSP all 24 bit and I think that Philips DAC is connected in same way.
Peter Zubaj
Here is a web page with some nice pictures of the chips on the Audigy1 http://board.gabara.co.kr/Board/Read.php?tName=b_goods_ps&number=373 Do you have that ^ card ?
I have an Audigy2 non-platinum, and it has the Philips 1361T Chip.
http://www.semiconductors.philips.com/pip/UDA1361TS_N1.html#datasheet
It looks to me to be an ADC for 2 channels. (Left and Right)
As it is an ADC, I don't see how it can help playback. It probably handles the Line-in jack, which currently does not work with alsa.
There is another Chip on my Audigy2 which is a Cirrus Logic CS4382-K
http://www.cirrus.com/en/products/pro/detail/P282.html
That is a 8-channel DAC so it would handle Playback, but strangely, the card only has 7-channel output (2 stereo jacks, and 1 3-channel jack).
There are also some OP-AMPs
3x ST 4558C chips dual opamp
1x JRC 4556A chip dual opamp
1x ST 33078 / Z250 dual opamp
The AC97 chip is a Sigmatel STAC9721T http://www.alsa-project.org/alsa/ftp/datasheets/sigmatel/9721spec.PDF
The main Audigy2 chip is Creative Audigy2 CA0102-IAT
It also has a Serial EEPROM: CSI 93C46S
It also has an as yet unidentied creative chip: NO302 CA0151-DBS
Does anyone have a Pin-Out details of the CA0102 and CA0151 ?
Cheers James
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