[alsa-devel] e-mu 1212m and 1820(m) patch

[James Courtier-Dutton]

Ctirad Fertr wrote:
>> The link between hana and emu10k2 is 32bit.
>> The link between the emu10k2 and the PCI bus for capture is 16bit and
>> limited to 16 channels. 
> 
> Really? I'm almost sure that emu10k2 is capable of 64 streams at 16/44.1
> (48kHz) resolution. 
> 

For playback, not for capture.

>> I decided to instead make this link 32bit, by 
>> using 2 16bit channels, thus resulting in 16/2 = 8 channels.
>> I do have one datasheet that hints at a 24bit channel from emu10k2 and
>> the PCI bus, but I have not checked if the 1212m version of the emu10k2
>> supports it.
> 
> A friend of mine does 16 channel recordings on 1820m under windows, so it's 
> definitely possible. I have only 1212M (old version) and it's capable of 12 
> ins and 12 outs at 44.1/48kHz, 8 ins and 8 outs at 96kHz and finally 4 ins 
> and 4 outs at 192kHz. 

What resolution? 16bit or 24bit. I could get the above working for 16bit
capture.

> 
>> It might only be the 1616m that supports it, and I have not 
>> added support for that in alsa yet.
> 
> How much difference is between current 1820 (old 1010)  and 1616 (new 1010) 
> code? Do you have something working? Anyway, I have good relations with local 
> e-mu delaer, so I can borrow any e-mu hardware currently available. I also 
> have gear needed for testing S/PDIF/ADAT/sync card functionality. 

I have not tried the 1616 yet. I expect that it will require different
firmware, but I have to test first.

> 
> Regards,
> 
> Ctirad
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