tascam us-428 patch 0.0.2

tascam us-428 patch 0.0.2

[Karsten Wiese]

hey,

on http://hal9000.drehmoment.org/tascam/ you can download a patch against
cvs of august 14.
it contains:

- snd-usb-us428
  downloads firmware to endpoint 2.
  creates 2 midi devices through the patched snd-usb-midi
  and 2 input + 1 output pcm devices.

- snd-usb-midi with exports
  same as before ( i hope...), except added exports to make it callable by
snd-usb-us428.
  Clemens and Takashi: you think its ok, or is there a better way?

- snd-usb-us428-dl
  firmware for a coldly booted us-428.
  this driver's task can shurely be done by a generic ez-usb
firmware-loader.
  for now it is needed to prepare the us-428 for the snd-usb-us428 module.

midi & audio work i.e. with the bristol-synths (44100 & 48000 S16_LE).
the us-428 control's messages are only printked except for the master volume
slider, which is functional.

the firmware and usb messages have been sniffed from the win2k 3.09 driver
with an improved version of sniffusb 1.5. (there has been no support from
tascam so far)
should you like to sniff, i'll mail the sniffer to you.

there are still some things to improve like
- mapping the controls messages to midi messages
- stearing the leds by midi messages
- enhancing audio (24bit (possible by simply using altsetting 2), input
monitoring)

cheers,
karsten

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Re: tascam us-428 patch 0.0.2

[Takashi Iwai]

Hi Karsten,

i didn't still take a deep look at the patch, so below is just a short
impression:

At Thu, 15 Aug 2002 11:17:37 +0200,
Karsten Wiese wrote:
> 
> hey,
> 
> on http://hal9000.drehmoment.org/tascam/ you can download a patch against
> cvs of august 14.

the usb stuff was moved to alsa-kernel yesterday, so perhaps the patch
became obsolete against the current tree.  could you regenerate the
patch, so that it can be applied easily to upcoming rc3 tarball?
it must not be difficult.

> it contains:
> 
> - snd-usb-us428
>   downloads firmware to endpoint 2.
>   creates 2 midi devices through the patched snd-usb-midi
>   and 2 input + 1 output pcm devices.
> 
> - snd-usb-midi with exports
>   same as before ( i hope...), except added exports to make it callable by
> snd-usb-us428.
>   Clemens and Takashi: you think its ok, or is there a better way?

I think it's better to integrate this workaround into the general
snd-usb-midi driver (except for firmware stuffs).
the integration of usb audio and midi parts is one of the items to be
considered well.  so far, we have two completely separate layers...

anyway, we need to take the better integration into account.


> - snd-usb-us428-dl
>   firmware for a coldly booted us-428.
>   this driver's task can shurely be done by a generic ez-usb
> firmware-loader.
>   for now it is needed to prepare the us-428 for the snd-usb-us428 module.

then this could be done also via fxload?

> midi & audio work i.e. with the bristol-synths (44100 & 48000 S16_LE).
> the us-428 control's messages are only printked except for the master volume
> slider, which is functional.
 
good.

> the firmware and usb messages have been sniffed from the win2k 3.09 driver
> with an improved version of sniffusb 1.5. (there has been no support from
> tascam so far)
> should you like to sniff, i'll mail the sniffer to you.
 
this is somewhat i'm worrying.
that means, the file is still copyrighted by tascam, and we are not
allowed officially to distribute it even in other forms.
the best is to get a permission from them.


ciao,

Takashi


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