Re: Lost MIDI messages
Re: Lost MIDI messages
- Subject: Re: Lost MIDI messages
- From: Mike Stoddard <email@hidden>
- Date: Fri, 25 Apr 2008 12:25:02 -0700
- Organization: Stoddard Web Narratives
Todd, is your Mac PPC or Intel? Mine is PPC, and I
got the impression from M-Audio that only PPC drivers
were effected.
Cheers,
-Mike
Todd Blanchard wrote:
I got curious and updated one of my machines to 10.4.11. I found no
change. Also, the messages don't show up in MIDI Monitor - so does the
hardware driver even matter? I think there is something environmental
but I can't imagine what it is.
-Todd Blanchard
On Apr 24, 2008, at 8:48 PM, Mike Stoddard wrote:
The difference between 10.4.9 and 10.4.11 DOES matter.
M-Audio's drivers all had to be rewritten for 10.4.11.
I reported bugs in AudioMidiSetup to Apple when I
upgraded from ..10 to ..11. No one has ever explained
what happened, but there certainly were some important
changes in CoreAudioMidi at that time.
Anyone at Apple know what happened?
Oddly enough, MOTU's D.A. drivers were NOT effected
by the changes. I wonder why.
Cheers,
-Mike Stoddard
Todd Blanchard wrote:
I have a user who is testing my application and he reports that
program change messages are only getting through about half to one
third of the time. These are messages I'm writing to an external
MIDI interface to control a Roland RD300SX.
The RD300SX has kind of an odd protocol for patch changing - you send
it a MIDI Control 0 value 87, a MIDI Control 32 value 67-ish to
select the right bank, and then a MIDI Program Change with some value.
I've instrumented my code and print out the messages I'm about to
send and again immediately after. No exceptions are thrown and I see
no errors. All messages are sent.
However, using MIDI Monitor to spy on sent messages, they only make
it out about 1/2 to 1/3 of the time on his machine.
On my machine, MIDI Monitor faithfully reports all messages I send -
no droppage at all. (My user is halfway around the world so I'm
relying on what he tells me).
His OS is 10.4.11 - I'm using 10.4.9. Not that I think it matters.
Can I buy a clue what would cause message loss like that? Wonky MIDI
driver for his device? His setup
MacBook 2ghz w/ 2GB of ram
OSX 10.4.11
Presonus Firepod (Audio use only)
Unitor AMT 8 MIDI interface (MIDI only)
I think the Unitor is an older device but I don't know much about it.
I'm stumped.
-Todd Blanchard
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