From: Damon Chaplin <damon@karuna.eclipse.co.uk>
To: Clemens Ladisch <cladisch@fastmail.net>
Cc: alsa-devel@alsa-project.org
Subject: Re: Problem with CME UF5 MIDI keyboard master volume slider
Date: Mon, 13 Aug 2007 16:38:40 +0100 [thread overview]
Message-ID: <1187019520.3219.5.camel@localhost.localdomain> (raw)
In-Reply-To: <1186757723.30437.1204736811@webmail.messagingengine.com>
On Fri, 2007-08-10 at 16:55 +0200, Clemens Ladisch wrote:
> I wrote:
> > Damon Chaplin wrote:
> > > Is it possible to workaround the problem?
> >
> > Only by changing the driver. Please wait until tomorrow.
>
> Well, the driver should now continue after receiving bad data.
>
> To be able to convert the data sent by the CME UFx to a real master
> volume message, I need to know the data format at a lower level.
> Please change line 58 of sound/usb/usbmidi.c to
> #define DUMP_PACKETS
> and recompile the driver, then show the entries that are written to the
> (debug) system log when a master volume message is received.
Here they are. Only one byte changes as the slider moves,from 00 to 7f:
received packet: [ 0f f0 7f 7f 04 01 7f 00 f7 ]
received packet: [ 0f f0 7f 7f 04 01 7f 7f f7 ]
^^
Damon
prev parent reply other threads:[~2007-08-13 15:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-04 10:34 Problem with CME UF5 MIDI keyboard master volume slider Damon Chaplin
2007-08-06 10:41 ` Clemens Ladisch
2007-08-07 16:18 ` Damon Chaplin
2007-08-08 8:11 ` Clemens Ladisch
2007-08-08 13:53 ` Damon Chaplin
2007-08-08 14:44 ` Clemens Ladisch
2007-08-08 16:36 ` Damon Chaplin
2007-08-09 8:27 ` Clemens Ladisch
2007-08-10 14:55 ` Clemens Ladisch
2007-08-13 15:38 ` Damon Chaplin [this message]
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