From: James Courtier-Dutton <James@superbug.co.uk>
To: Ctirad Fertr <c.fertr@volny.cz>
Cc: alsa-devel@alsa-project.org
Subject: Re: e-mu 1212m and 1820(m) patch
Date: Sat, 12 May 2007 15:11:22 +0100 [thread overview]
Message-ID: <4645CB0A.4010707@superbug.co.uk> (raw)
In-Reply-To: <200705121202.52741.c.fertr@volny.cz>
Ctirad Fertr wrote:
> Dne sobota 12 květen 2007 10:46 James Courtier-Dutton napsal(a):
>> Nice work. Did you manage to do this from just the comments I had placed
>> in the source code, or did you use some other method?
>
> I learned most part form the register names in emu10k1.h. They are quite self
> explaining.
>
>> I would like to put enough comments in the source code so others, like
>> yourself, can add functionality that I have not had time to.
>
> It would be nice. There is another developer, Dustin, who I meet at local
> linux forum. He tries to find a way how to add more 24 bit capture channels
> then 8. It is confusing, as we don't have enough informations about
> connections between Hana and emu10k2. We belive EMU32 buses are 32bit and not
> 16 bit. The windows driver can record from (at least) 16 channels, anyway.
> Multichannel playback needs to be fixed as well. We need a help or at least a
> hint from you as you are only person who have datasheets.
>
> Regards,
>
> Ctirad
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. 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. It might only be the 1616m that supports it, and I have not
added support for that in alsa yet.
James
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next prev parent reply other threads:[~2007-05-12 14:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-11 21:54 e-mu 1212m and 1820(m) patch Ctirad Fertr
2007-05-12 8:46 ` James Courtier-Dutton
2007-05-12 10:02 ` Ctirad Fertr
2007-05-12 14:11 ` James Courtier-Dutton [this message]
2007-05-12 15:38 ` Ctirad Fertr
2007-05-13 12:03 ` James Courtier-Dutton
2007-05-13 13:37 ` Ctirad Fertr
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