[sdiy] MIDI control syntax to debug 16 bits values on the MIDI steam using MIDI-OX MIDI monitor ?

[Richie Burnett]

>> When receiving just data bytes (hi bit of 0), the receiving MIDI driver
>> applies running status, and in turn you see expanded full messages in
>> MidiOx even though there wasn't a status byte on the cable.
>
> ...When debugging MIDI streams, it's best to have a precise picture of the 
> data on the wire.

Yes, I've been caught out by that before!  I hadn't realised that the 
running status interpretation was a driver level thing, rather than a 
MIDI-OX thing, but that makes sense.

One option I've used in the past was to connect an FTDI TTL to USB cable to 
the UART Tx or Rx pin (or an opto-coupler output) and bring the MIDI data 
into the computer on a USB virtual COM port set to 31250 baud.  Then you can 
view/capture the data using a terminal program of your choice like PuTTY, 
Termite, etc.  Then you see exactly what is on the cable.

-Richie, 


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