A few things - using a mix bus is technically adjusting the sum of the volume, but the group faders example in the video is like VCA groups (one fader sending values to all other faders without moving the fader).Alkua wrote: @Gala
The video that you post is about group faders, and Reason already do it by routing to a mix bus. VCA fader is a little different. With one fader you can increase or decrease the volume of multiple channels. in group fader you increase or decrease the sum of the volume, with VCA fader increase or decrease each one.
The problem with the CV approach in Reason is that it is NOT linear. Lowering a group of faders by the same CV amount only works if all faders are at the SAME level (not likely!). So when using this approach, the critical balance between channels (the "mix") will change.
This is why I included the VCA Group feature in Selig Gain, which AFAIK is the only way to accomplish VCA style groups in Reason and the only case where the "slave" channels will accurately track the "master" down to 0.1 dB.
Otherwise, using a sub-mix (group) accomplishes the exact same end result as moving all the individual faders down or as using the Selig Gain VCA approach. The only solution that doesn't retain the balances is when using the Level CV input on the channel, sadly!