Limiting MIDI CC knob to max out at 0dB

Bome Products
1

I am looking to move from Osculator [no longer being developed] to MIDI Translator Pro for when I upgrade to Mac OS Sequoia. At this time, I have a very simple need and that is to control several faders in Digital Performer from an external MIDI device. In my case it is the Monogram Palette. I have so far gotten MTP working where the three knobs on my Monogram are controlling the first 3 faders in the Digital Performer mixer [which is good]. The next thing I would like is to be able to limit the data to never allow the mixer fader in Digital Performer to go above 0dB [unity gain] no matter how much I keep turning the MIDI CC knob. I have these 3 controllers on the Monogram each mapped to the Dialog, SFX and Music bus in Digital Performer. Right now the MIDI controller can vary the Digital Performer mixer from infinity [no sound] all the way up to it’s maximum of +6dB. Like I said, I want it to stop at 0dB and not max out at +6dB. Previously in Osculator, the value of 12770 equated to 0dB and so that was programmed in and would like to figure out a way to do this in MTP.
Using MTP, I’m using on the outgoing side, Raw MIDI/System Exclusive and have the hex as E0 qq qq for the first channel, E1 qq qq for the second mixer channel and E2 qq qq for the third mixer channel. I’m not ‘smart’ enough to figure out how to tweak the hex values to get my desired result.
Or perhaps, this isn’t the right way to do it in MTP?
In Osculator, I simply had to route MIDI CC 105, 106, and 107 where each of those MIDI CC’s correspond to whatever the first 3 Faders are in the Digital Performer Mixer from the left side at any given time. And like I said, they would stop increasing at 0dB with the Osculator output max value limited to 12770. Perhaps I’m totally down the wrong path at the moment to accomplish what I want to accomplish.
Here is the txt file of the setup right now that is working in every way EXCEPT for stopping/maxing out at 0dB [unity gain] in the Digital Performer Mixer.

Default MIDI IN ports: Application
Default MIDI OUT ports: My Controller, Bome MIDI Translator 1 Virtual Out, Bome Virtual Port 1

Translator 1.0: Fader 1
Options: swallow
Incoming: Control Change on ch. 1 with CC#:105 (0x69) and any value set “qq” to value
Outgoing: MIDI E0 qq qq

Translator 1.1: Fader 1
Options: swallow
Incoming: Control Change on ch. 1 with CC#:106 (0x6A) and any value set “qq” to value
Outgoing: MIDI E1 qq qq

Translator 1.2: Fader 1
Options: swallow
Incoming: Control Change on ch. 1 with CC#:107 (0x6B) and any value set “qq” to value
Outgoing: MIDI E2 qq qq

Thank you for any help that can be provided.
CC to DP Mixer.bmtp (958 Bytes)

2

Yes, we do something called ‘scaling’ which is discussed in this tutorial.

I’ve added rules to scale the value as you wanted in the attached project file. Then I extracted the MSB and LSB to put into the values pp and qq.

// scale it
qq=qq*12770
qq=qq/127

Log "Value is %qq%"

//Pitch Bend LSB is first then MSB
//put MSB into pp
pp=qq>>7
// lsb mask into qq
qq=qq&127

CC to DP Mixer-Scaled.bmtp (2.2 KB)

Steve Caldwell
Bome Customer Care

Also available for paid consulting services: bome@sniz.biz
3

Amazing Steve! This is exactly what I was looking for. Now I can leave Osculator.
Need to disect what you did though so I understand how the magic is happening.
Thank you so much,
Ben

1 Like