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In Reply to: RE: How about a different approach: replace Juli@'s analogue PCB posted by GStew on April 01, 2009 at 18:27:10
Juli@'s ASIO drivers remains the best I've seen to date.
New analogue board plugs onto this using I2S interface which I assume will support 24 bit DACs only (a deal breaker for 32 bit DACs). Alfred uses this interface for the Buffalo / Sabre DAC. Alfred: can you confirm 32 interface?
I'm not religious about 24 or 32 bit: important factors are SNR and the ability to bypass internal reconstruction filter. My AA Prestige SE uses the PCM1792 DAC which is excellent. Both AKM and ESS Sabre are excellent 32 bit DACs and yes the Sabre would be a brilliant choice (even better than 1794) given that we can disable its filter and includes IV stage & PS refinements.
So lets go with the Sabre and add RCA outs as well.
Will look into Peter Daniels' work as well. DIY thread is a great start (PS - my loyalties lie with AA).
Follow Ups:
Regarding Juli@ i2s out and ESS Sabre32:
Not sure wether Juli@ i2s out will work with ESS Sabre32 "as is" right away, will have to test. If it doesn't, this can likely be fixed by choosing a different PCM audio interface format - ESS Sabre32's default is 32-bit but can be set to 24-bit by programming the registers.
Documentation is light and so far, my readings suggest Sabre 2008 allows for disabling "Demphasis" only. Can't get any info on Sabre 2018.
Just thinking aloud:
The ESS Sabre32 has 32bit PCM audio input stream as default - would it be possible and would it make any sense to have SRC resample to 32/192...? Haven't thought about this yet, but apparently Asus Xonar soundcards can output 32bit (at least Xonar DX can, see test here: http://www.atomicmpc.com.au/Review/116715,asus-xonar-dx-pci-e.aspx) - not sure if Juli@ can.
Anyone any thoughts if 32bit make any sense?
.
32 bit i2s and filter disable confirmed
Edits: 04/04/09
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