One thing in mixing i don't understand: Bjorn puts the level of all tracks to -15 dB to get headroom for mixing. But he leaves all channel faders on 0 dB and sets the input of all channels to -15 dB, f.e. on the output of the software instrument. Would it not be much easier to put the level to - 15 dB with the channel faders?
I had the exact same question and Ive learned a lot about why he does this.
A really great discussion on this from some serious pros in this thread on gearslutz:
TL;DR is this:
Setting the gain right off the source to approx. -15db gives head room for plugins after the source to add to the sound without adding unintended distortion and clipping. The channel fader is at the end of the signal path so setting the level here instead of at the source can not avoid this potential distortion.
If your input source comes in at -0.1db then, for example, an EQ with a +4db boost to the highs coming after will just slam into the ceiling with no where to go except distorting. The channel fader being last means it cannot help, it will simply lower the volume of the distorted signal it receives.
FYI this is greatly simplified for brevity and clarity. There is a lot more to it than just this. Check out the thread if you want to know more. But setting input sources to -15db is a good practice for a number of reasons. how you ultimately choose to gain stage is up to you.