From: Daniel Mack <zonque@gmail.com>
To: Kristian Amlie <kristian@amlie.name>
Cc: alsa-devel@alsa-project.org, Clemens Ladisch <clemens@ladisch.de>
Subject: Re: How to add a new MIDI device to the usbaudio driver
Date: Thu, 25 Aug 2011 14:38:27 +0200 [thread overview]
Message-ID: <CACTFLAOgoOdd9Y8fQGvLXjUntzwsMDN7KYtftExGCHeU8jMeHw@mail.gmail.com> (raw)
In-Reply-To: <4E5631E1.7050400@amlie.name>
On Thu, Aug 25, 2011 at 1:28 PM, Kristian Amlie <kristian@amlie.name> wrote:
> One caveat I have discovered with the patch: If you keep the instrument
> plugged in, but reload the driver, then the driver gets out of sync with
> the MIDI messages and won't report any. This seems to be because, in the
> stream, the message type is cached and subsequent messages do not report
> what type of message they are unless they are switching to a new type
> (going from control message to note message, for example). You can reset
> the stream by manually generating MIDI messages of different types (turn
> the volume knob while pressing a few notes), or eventually the
> instrument will reset itself and send the type anyway. So it's not
> critical, but would be nice to fix. I'm not sure how to solve it though...
What you're seeing here is a general problem of the MIDI protocol that
cannot be fixed. If a receiver misses the running state update, it
can't do anything but wait for the next one.
Daniel
next prev parent reply other threads:[~2011-08-25 12:38 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-22 10:52 How to add a new MIDI device to the usbaudio driver Kristian Amlie
2011-08-22 10:54 ` Daniel Mack
2011-08-22 11:40 ` Kristian Amlie
2011-08-22 11:49 ` Daniel Mack
2011-08-23 7:35 ` Kristian Amlie
2011-08-23 8:43 ` Daniel Mack
2011-08-23 9:03 ` Paul Menzel
2011-08-23 9:22 ` Daniel Mack
2011-08-23 9:42 ` Kristian Amlie
2011-08-23 10:02 ` Paul Menzel
2011-08-27 10:38 ` Kristian Amlie
2011-08-23 9:38 ` Clemens Ladisch
2011-08-23 9:42 ` Daniel Mack
2011-08-23 10:07 ` Kristian Amlie
2011-08-23 10:16 ` Daniel Mack
2011-08-23 11:57 ` Kristian Amlie
2011-08-23 12:20 ` Daniel Mack
2011-08-23 13:12 ` Kristian Amlie
2011-08-23 13:16 ` Daniel Mack
2011-08-23 13:28 ` Kristian Amlie
2011-08-23 13:44 ` Daniel Mack
2011-08-24 8:09 ` Kristian Amlie
2011-08-24 8:32 ` Daniel Mack
2011-08-24 10:14 ` Kristian Amlie
2011-08-24 10:29 ` Daniel Mack
2011-08-24 13:14 ` Kristian Amlie
2011-08-24 13:18 ` Daniel Mack
2011-08-24 19:51 ` Clemens Ladisch
2011-08-25 11:28 ` Kristian Amlie
2011-08-25 11:35 ` [PATCH] Added support for Starr Labs USB MIDI devices Kristian Amlie
2011-08-25 12:20 ` Daniel Mack
2011-08-25 13:40 ` Kristian Amlie
2011-08-26 11:24 ` Clemens Ladisch
2011-08-25 12:38 ` Daniel Mack [this message]
2011-08-24 11:44 ` How to add a new MIDI device to the usbaudio driver Clemens Ladisch
2011-08-24 12:05 ` Daniel Mack
2011-08-24 13:19 ` Kristian Amlie
2011-08-24 16:01 ` Clemens Ladisch
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