Can undefined CC 106 and 107 access 14-Bit option in order to implement BeatBuddy Tempo?

Question

MIDI Target Manufacturer(s): Singular Sound

Tempo ranges from 40 to 300 by delivering two consecutive CC commands

CC 106 (MSB) value range 0 to 2

CC 107 (LSB) value range 0 to 127

According to other posts, this could be achieved if those two CC had access to 14-Bit setup

Answer 1

The MIDI spec defines two types of 14 bit Ccs
- 32 14 bit Ccs pairs, separated by 32 (20H), from 00/32 (20h), bank select MSB / LSB 32 , up through 1F / 3F (Undefined MSB / LSB)
- 2 14 bit Cc pairs, RPN and NRPN, separated by one number, with LSB lower (98 / 99 = NRPN LSB / MSB, 100 / 101 = RPN LSB / MSB)

MIDI Designer
- allows the 20h 14 bit pairing through the entire range, allowing selection of 14bit Ccs up through the 5F/7F pair
- implements NRPN (but not RPN)

Despite not having native implementation of this Beat Buddy implementation, MIDI Designer gives you ability to implement this with two Cc controls and one supercontrol.

I am presuming the 14 bit MIDI value goes from 40 - 300, directly encoding the tempo value.

For MSB, make a knob, Cc 106, 261 ticks, use named ticks - see below.  Repeat for LSB with Cc 107.

Make a third knob to be the supercontrol, choose 14 bit Cc (specific Cc doesn't matter since it is a supercontrol), 261 ticks, Display Min 40, Max 300, make a supercontrol of MSB and LSB knobs (ensure MSB is listed first)

Best to build the named ticks in a spreadsheet

Value  MSB  LSB
040      0       40
041      0       41
...
127      0      127
128      1       0
...
299      2       43
300      2       44

Paste the MSB column in named ticks field for MSB, similar for LSB.

Comments

Just researching a bit. Issue is gonna be that BB (like many devices) doesn't report its tempo to MIDI out. It just sends a newly timed MIDI clock. But, SB code can determine that new tempo by counting the clock, eg:
https://audeonic.boards.net/thread/504/tempo-number-mf-dynamic-clock

I guess this could periodically update the supercontrol to detected values (without sending back to BB)?

Complicated, but could be worth the effort?

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I'm sending the increment/decrement CC to BB already, but, doesn't update the temp slider. Either could update the tempo slider... or have it bi-directional as you (@robertjbegingmail-com) suggested??

---

I tested this code (https://audeonic.boards.net/thread/504/tempo-number-mf-dynamic-clock) with StreamByter and Midimittr :

IF LOAD
  ASS L0 = 0 # tick counter
END
IF M0 == F8 # got tick
  MAT L1 = L0 % 18 # if on 24 tick boundary
  IF L1 == 0
    MAT L2 = EA60 / T0 # calculate+show bpm
    SET LB0 L2 +D
    # convert bpm in L2 to DC sysex
    MAT I0 = L2 / 64 # get hundreds
    MAT I1 = L2 % 64 # strip hundreds
    MAT I1 = I1 / A  # get tens
    MAT I1 = I1 * 10 # shift left
    MAT I2 = L2 % A  # get units
    MAT I1 = I1 + I2 # add units to tens
    SND F0 5A I0 I1 00 F7 #will need to adjust frequency of this midi send message with mod function.
  END
  MAT L0 = L0 + 1 # increment tick counter
END

...

Bottom line is that this method is unreliable probably due to Bluetooth latency. The reported BPM fluctuates by +/- 1

In my opinion, Singular Sound should send tempo as a regular SYSEX message much like they do with the time signature. That would be the simplest solution.

---

I've asked Brennan at Singular sound where to report bugs (I've found some) and would also be good to put this as a feature request... but I don't know where on their forums... do you?

---

I commented here:

https://forum.singularsound.com/t/bb-midi-out-tempo/26845

But I’m not holding my breath.

Answer 2

The MIDI spec defines two types of 14 bit Ccs
- 32 14 bit Ccs pairs, separated by 32 (20H), from 00/32 (20h), bank select MSB / LSB 32 , up through 1F / 3F (Undefined MSB / LSB)
- 2 14 bit Cc pairs, RPN and NRPN, separated by one number, with LSB lower (98 / 99 = NRPN LSB / MSB, 100 / 101 = RPN LSB / MSB)

MIDI Designer
- allows the 20h 14 bit pairing through the entire range, allowing selection of 14bit Ccs up through the 5F/7F pair
- implements NRPN (but not RPN)

Despite not having native implementation of this Beat Buddy implementation, MIDI Designer gives you ability to implement this with two Cc controls and one supercontrol.

I am presuming the 14 bit MIDI value goes from 40 - 300, directly encoding the tempo value.

For MSB, make a knob, Cc 106, 261 ticks, use named ticks - see below.  Repeat for LSB with Cc 107.

Make a third knob to be the supercontrol, choose 14 bit Cc (specific Cc doesn't matter since it is a supercontrol), 261 ticks, Display Min 40, Max 300, make a supercontrol of MSB and LSB knobs (ensure MSB is listed first)

Best to build the named ticks in a spreadsheet

Value  MSB  LSB
040      0       40
041      0       41
...
127      0      127
128      1       0
...
299      2       43
300      2       44

Paste the MSB column in named ticks field for MSB, similar for LSB.