Re: MIDI In OK, No MIDI Out
Re: MIDI In OK, No MIDI Out
- Subject: Re: MIDI In OK, No MIDI Out
- From: Bob Lang <email@hidden>
- Date: Sun, 19 Jun 2011 15:56:32 +0100
Hi
On 19 Jun 2011, at 15:44, Paul Davis wrote:
> On Sun, Jun 19, 2011 at 10:35 AM, Eric Kampman <email@hidden> wrote:
>
>> The info on the high bit's purpose was interesting. I assume this doesn't apply to SysEx messages
>
> it applies to ALL MIDI messages. this is one of the reasons why its
> such a painful protocol for sending more than simple commands. if you
> want to send N bytes as a sysex, you have to break it down into 7 bit
> units and send each one in a MIDI byte, bracketed by the start-sysex
> and end-sysex status bytes.
It's part of the MIDI protocol: each command (status) byte must have the MSB set to 1, each data byte must have the MSB cleared to zero. Hence all the data bytes in a SysEx must have a value in the range 0x00 to 0x7F.
Bob _______________________________________________
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