Re: [Jsynthlib-devel] explicitly setting start of sysex in send/store patch (Korg)

[Jeff W. <jww...@ya...>]

--- Steven Schmidt <ste...@co...> wrote:
> When I try to store a patch back to the synth - the
> MidiMonitor shows:
> XMIT: Control Change
>   b0 00 00
> XMIT: Control Change
>   b0 20 04
> XMIT: Program Change
>   c0 15
> XMIT: Program Change
>   c0 15
> But never sends a patch.  The debugger showed a
> value of 112 (0x70) in 
> the first Byte, so I explicitly set it to F0 and
> voila - midi monitor 
> does show the patch getting sent.  It still didn't
> save it on the synth, 
> but I'll worry about that later. 
> 
> My question - Should I expect to set the start of
> sysex like that? 
> 
The answer to your first question is, no.

This sounds like the same thing I got caught on. You
need to make sure you have the proper overrides of the
calculateChecksum methods in your driver. If your
patch does not use a checksum, you still need to
override calculateChecksum with a null method. If you
don't do this, the default calculateChecksum will
calculate a value and place it at offset zero of your
sysex record.

See programming.html for details.


		
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