Re: MusicPlayerStop() and all-notes-off messages
Re: MusicPlayerStop() and all-notes-off messages
- Subject: Re: MusicPlayerStop() and all-notes-off messages
- From: Bill Stewart <email@hidden>
- Date: Wed, 22 Jan 2003 17:52:41 -0800
We're still a little confused about why this has changed in 10.2.3
(something we're looking into)
I have my suspicions:)
It does go back to the fact that the all notes off message is not an
ideal message to send to a synth that is not actively rendering (though
it should have the desired consequent effect - and that is what appears
to have been broken)
As a workaround, when you stop the player if you call AudioUnitReset on
the synth unit that will turn off the sounding notes next time you ask
it to render...
Bill
On Tuesday, January 21, 2003, at 11:45 PM, Lars Peters wrote:
Hi,
Oh, o.k., I thought you had the same problems. Either way: may
interpretation of how MusicPlayerStop() should work with DLS is based
on what I saw before 10.2.3. On 10.2.3 my old code is broken.
Lars
Am Dienstag, 21.01.03 um 05:03 Uhr schrieb Andre Lipinski:
Hi,
I'm having a different problem than this (the DLS just ignores
incoming MIDI under some circumstances) I realise now that the
problem you're seeing is not related to the DLS, but to your
interpretation of what Stop means to the music player. It doesn't
mean "stop playing and close all open notes" it means stop advancing
forward in time.
Andre.
On Sunday, January 19, 2003, at 11:41 AM, Lars Peters wrote:
Are you seeing this with DLS Synth only or with other devices as
well?
Since I don't have the problem with my external synth and Andre
Lipinski had the same problem with DLS Synth but without
MusicPlayer, I assume it's a problem of the AU rather than
MusicPlayer.
Regards,
Lars
Am Samstag, 18.01.03 um 21:36 Uhr schrieb Christopher Corbell:
I've noticed that when playing a music sequence, if you stop the
playback
with MusicPlayerStop() the notes appear to be still "sounding" in
the device
even though they are audibly stopped. If you then call
MusicPlayerStart() at
time 0, the notes that were sounding will become audible again.
I'm assuming this is more or less a bug, but I'm hoping to find a
work-around.
One thing I've tried is stopping the AUGraph right after I call
MusicPlayerStop(),
and starting it again before I call MusicPlayerStart(), but this
didn't seem to
change anything (other than maybe saving a little CPU when no
sequence
is running).
Sending a midi all-notes-off message (0xBn 123) does help. I'm now
sending
this both at the time the sequence is stopped and before every call
to
MusicPlayerStart(). However even here there will be a brief
"thunk" of the
formerly sounding notes when you call MusicPlayerStart(), which
immediately
becomes silent and lets the sequence begin again.
I think this is overall a pretty minor thing now, except that if
someone has finished
a sequence and is ready to do something like output it to an
external audio recorder
they'll get the thunk if they weren't lucky enough to stop the last
playback at a silent
instant.
Note that you won't notice any of this behavior if you cal
MusicPlayerStop() after
a sequence has finished or while no notes are sounding.
Can anyone off any suggestions?
Thanks in advance,
Chris
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