Sending program changes to external hardware on scene load?

Hi carneyweb ,

Yes, this is done using the Stream Byter. It's (relatively) easy. Here are the steps:

1. Make sure the MIDI destinations you want to send the program changes to are on the canvas.

2. Drop a Stream Byter onto the canvas. Connect it's output to all the hardware ports. You can leave the Stream Byter's input disconnected.

3. Use the cog to open up the Stream Byter and you then add some SND rules inside an IF LOAD to send program changes when the scene is loaded. Here are some examples:

# issue program changes
# rules inside IF LOAD are
# executed when a scene loads
IF LOAD
  SND C0 00 # CHAN 1, PC 0
  SND C1 07 # CHAN 2, PC 7
  SND C2 1A # CHAN 3, PC 26
  SND CF 2B # CHAN 16, PC 43
END

When you press the 'Install Rules' button, it will then send your program changes straight away. Handy for testing your work. When you're done, save to a scene and when the scene is recalled, the routings are setup first and then the Stream Byter will fire its program changes automatically.

If you want to send scene changes on different channels then you adjust the C0 part of the message to C1 for channel 2, C2 for channel 3 all the way up to CF (it's a hex number) for channel 16.

To change the program change number that gets sent out, you adjust the second byte of the SND message. It's a hex value from 00 to 7F (decimal 0 to 127).

If you have, say multiple hardware units listening on the same channel but you want to send them different programs, then create separate Stream Byters and connect accordingly.

If you also need bank select, let me know.

Regards, Nic.

And one other quick question... is there a way using Stream Byter to get the effect of a "Harmonic Rotator"? If you don't know what that is, here's a link to some pages that provide good descriptions:

www.johanlooijenga.com/tools/5-apps/45-version3.html
ewilogic.com/index.php/2018/01/29/harmonic-rotator/


If not... can I add that as a feature request for a new module that does this?? :-)

Thanks again!

If I'm decoding things correctly,

B#: The "B" stands for "Bank Select", and the # is "channel number minus one"
The first argument (column): controller number in hex (00 = MSB, 20 = LSB)
The second argument (column): value to send to the controller

So, if I wanted to send Channel 5 a bank select with MSB 87 and LSB 2, I'd send:

# Select bank 87,2 on channel 5
B6 00 57     # 87 = 5*16 + 7
B6 29 02     # 2 = 0*16 + 2

Is that correct?

Then, the total setup for an instrument on channel 5 would look something like this:

IF LOAD
  # Select bank 87,2, PC 23 on channel 5
  SND B6 00 57     # 87 = 5*16 + 7
  SND B6 29 02     # 2 = 0*16 + 2
  SND C6 17          # CHAN 5, PC 23
END

Right?

OK. Right... duh.

So, do I have to use the SND command (like in my updated post above with the full example)

- Mike.

Yes, you need the SND (and inside an IF LOAD).

Regards, Nic.