Making CTRL for Prostage Remote Wah, stuck on 1 parameter

[verchrona]

Hello,

In the Prostage Remote Wah manual, there is a wah to edit the Auto Wah tempo, but this requires Sysex instead of CCs. I've already got the other parameters mapped. This one is giving me a bit of trouble.

(FROM MANUAL)

Auto WahWah Speed:
F0 00 20 75 00 76 XX F7
F0 00 20 75 00 77 YY F7
Auto WahWah speed (Time in ms = 2 * XXYY)
Warning: The entry is made in HEX! E.g. "0100" corresponds to binary 128, and the resulting time is therefore 2 * 128 = 256 ms)

This part confused the heck out of me because, isn't 10000000 = 128? How does 0100 = 128 from a binary set of numbers according to the manual? in

From the Midi Binary information, 0100 = 4

To get 128 in HEX, that would be 80, correct? I'm not sure how that is spread over 2 different message lines though.

Is this something that can be accomplished with the built in Sysex Multi message or does this require LUA scripting?

[damiensellier]

10000000 is binary 8 digit number (forget about it)
128 in "decimal" is 100 in hexadecimal. I guess they made a mistake on the denomination.

xx is the 1st byte (7bit) and yy being the 2nd byte (7bit)

so for a decimal value of 128 the message is :

F0 00 20 75 00 76 00 F7 (msb) with XX = 00h
F0 00 20 75 00 77 80 F7 (lsb) with YY = 80h

I'm pretty sure it's just sending MSB and LSB via sysex, knowing the value sent has to be devided by 2 beforehand.

The calculator:

The multi message settings:

You'll get this kind of message :

Sample panel:

According to the manual it goes from 40ms to 5000ms.

See attached panel if it works

Peace!

Damien

Remote WahWah Speed Sysex_1_0_2024-06-27_02-47.panel.zip

[damiensellier]

To be clear with an exemple :

For exemple:
a value of 5000ms would be 5000/2 = 2500
floor(2500/128) = 19
knowing that 19x128 = 2432
So 2500-2432 = 68 (remainder)

Here:
MSB is 19dec | 13hex
LSB is 68dec | 44hex

message would be :

F0 00 20 75 00 76 13 F7
F0 00 20 75 00 77 44 F7

Hope it helps

Damien

[verchrona]

Thanks very much for explaining that to me! I just got my intro to Hexadecimal yesterday. The control works perfectly with my Prostage Wah unit! I realized this unit may have a slower processor, so typing in the ms value definitely helps it not choke on the fast midi sysex output.

That example above explains the equation very well, I was scratching my head for hours yesterday trying to unravel it. Wonderful work coding the control and explaining the process clearly, Damien! Very much appreciated!

[damiensellier]

Thanks, you're welcome! happy it's working from the get go.
You can slow down the stream of data sent to the pedal with the timer method (sending 1 value every 20ms for exemple) or just send the value only when you release the mouse button. "send value only on release"

[verchrona]

Ah great tip! If only I knew that earlier, I returned a guitar pedal a while back specifically because it couldn't keep up with fast values!

[damiensellier]

It's a new feature we added a few months ago only for that particular purpose. It's pretty useful for old synths too.

[dnaldoog]

Hello,

In the Prostage Remote Wah manual, there is a wah to edit the Auto Wah tempo, but this requires Sysex instead of CCs. I've already got the other parameters mapped. This one is giving me a bit of trouble.

(FROM MANUAL)

Auto WahWah Speed:

F0 00 20 75 00 76 XX F7
F0 00 20 75 00 77 YY F7
Auto WahWah speed (Time in ms = 2 * XXYY)
Warning: The entry is made in HEX! E.g. "0100" corresponds to binary 128, and the resulting time is therefore 2 * 128 = 256 msm

It looks to me like they are sending two messages per value. The first XX is the msb; YY is the lsb. Hex 80 is 128 but one sysex data byte has a limit of 7f (127) so to send a value over 127 you need two bytes 01 * 128 = 128 XX and 00 = 0 sent in two messages, so the manual is correct.