On Thu, 1 Nov 2001, stef wrote:
> [EMAIL PROTECTED] wrote:
>
> > I have an emagic AMT 8 midi patch bay. (Similar to Unitor 8).
>
> I have this one, too. Works great with our apple macintosh.
>
> > 1) Is anyone working on a driver for this?
>
> Don't know. But it would be great.
>
> > 2) If not, is there a FAQ on how to approach a manufacturer for
> > documentation on their hardware for purposes of developing a
> > driver for them for free? (I should have to beg?)
>
> Emagic HQ is about 20 kilometers away from our studio at
> Hamburg, Germany. Maybe i should visit them.
>
> > 3) This is a USB to MIDI device. Is there any support in ALSA for
> > USB, or do we roll our own support?
>
> If you manage to get the protocol documentation, it should be no
> problem to use the USB lowlevel kernel drivers. The alsa driver
> would be in fact a usb device driver, which gets loaded by the
> kernel when you plug in the amt8.
>
> As far as i know the AMT8/Unitor devices use hardware timestamping
> at the inputs and hardware queuing for the outputs.
> But usually this is alsa's job. So don't know if it's possible
> to use these hardware features together with alsa.
Take a look at
http://www.math.tu-berlin.de/~sbartels/unitor/
You'll also find the complete unitor/amt8 documentation there (in german).
I'm too very interested in a working amt8 driver, serial or USB doesn't
matter to me - as long as it works.
It would be very interesting to see ALSA implementing device-specific
hardware queuing for multiport MIDI devices - lot's of the "professional"
ones have it nowadays. With different top-secret protocols of course.
--
Manush
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