Scope devices generally let you assign around 120 midi CC to various parameters. In the modular mixer, you can use hardware controllers in several ways for extended midi control.

1. What to assign ?

In addition to the usual controls such as solo/mute/levels/filters, you may want to save a few buttons and a couple of potis to general functions such as:
- Open/close panels if you will use the hardware controller intensively
- Rec channel selection of the master bus or other mixers
- Rec channel levels.

It is always annoying to have to rethink a mapping when you realize you have forgotten one of the above remote control.

2. How to save

In Scope, it is better to save a project to ensure recall of saved Midi CC assignments.
Alternatively, you can save a preset in the "Midi" bank of the main preset list (always save the preset and the preset list)

3. Simple assignments

Simple assignments is about assigning things when you need them, and only what you need.
That way, the same hardware controller can be shared between the modular mixer and the audio sequencer for example.

You will generally assign panels, and a few levels for recording, or may be some parameters of the Master bus, and a few Aux sends for live controls.
Also, some controls on the remote hardware are not assigned in advance and are meant to be assigned on a project basis (ex: 6 or 8 "free" potis).

4. Multi-midi assignments

Each device of the mixing network will receive Midi CC on a different midi channel.
That's where it becomes interesting because mainly limited to the type of hardware controller that you have.
It is also possible to use or build several remote controllers that will replicate most functions of your modular mixer.

Imagine that that you can also build a 24 stereo channel mixer with modules of 8 channels, that will fit a lot of hardware controller.
For example, a gigantic setup would include several BCF and BCR or Mackie Controls, each on different midi channels (or not) and controlling every module of the project.

5. Transporting CC

You can load the CC preset of a module into another equivalent module. For example, load the CC assignment of a 8 channel modules into a 16 channel module.
It means you can program the biggest modules (ex, 16 channels) and reload the preset in a smaller channel module (12,8,4 channel) as well as the mono, stereo, or hybrid version.

Also, if you program a Stem247 module, you can load smaller stems and routers and map the same preset to it. CCs will be assigned to common parameters of both devices.

6. Counting CCs.

There is a maximum 119 Midi CC usueable in each device in scope. More is possible, but does not have the expected functions of Midi CC.
Let's use 120 for easier calculations. Even if we have only 119, there are often free controls that allow to control what is actually described below.

120/24=5. You can almost fully controla Router 245 on 1 midi channel. That's 1 mix bus and 4 stereo aux sends. Leave 1 for the panel open/close function, and as we have 119, only 2 potis will be left unassigned.
120/16=7.5. You can fully assign a Router 167 or a Stem 165 (5 bus lines + 1 level + solo + few more parameters). the "0.5 is 1 Midi CC every 2 channels, so on 167 is is 8 more parameters to assign to other controls. Using 2*167 modules on 2 midi channels allow to remote control 7 sends on 32 channels.
120/8=15 . In a device with 8 channels, you can control 15 parameters per channels. Now, you may need: mute/solo/filter/levels by default, which is 4 parameters , leaving 11 parameters for insert effects or other functions.
120/6=20 If you assign 6 midi CC per channel, you can control 20 stereo or mono channels on 1 single midi channel. By using channel modules of 16, you leave 24 controls freely assignable.

A channel is generally the following parameters

Results are for 120 CC, so it is "-1 parameter on one channel":

With 3 CC per channel I can control 40 channels per midi channel
With 4 CC per channel I can control 30 channels per midi channel
With 5 CC per channel I can control 24 channels per midi channel
With 6 CC per channel I can control 20 channels per midi channel
With 7 CC per channel I can control 17 channels per midi channel
With 10 CC per channel I can control 12 channels per midi channel
With 15 CC per channel I can control 8 channels per midi channel

The division used by the SpaceF Modular Mixer's modules, ie, 24/16/12/8, is closely related to the number of CCs assignable in Scope and to the above numbers.

Building with modules of 8 leaves 10 controls per channels, for Eqs, compressors and filters.

The possibilities are countless in terms of hardware design.

7. Updateability

When you want different mixer modules, you change only one part of the mixer, while most of it will remain assigned as usual.

It is a good idea to make a default project for your favorite assignement setup, and to backup it.

Have fun.