According to the official manual suggested,
A4 and AR could out put audio to octa to build up a trinity setup, elektron funs call this dark trinity,
but recently I found out that maybe this setup really hurt your a4âs out put dynamic, specially bass.
I compared a4 main out to octa in put AB with mmm, maybe the way a4 handle stereo and pan different to original trinity, no matter which mode(ab,a,b,a+b) to choose mnm always out put the full vol to monitor, but if you hard pan the a4 to lift or right and octa in a or b mode you get a same vol and dynamic, otherwise hard pan a4 in ab mode octa you get a one side audio, center position pan a4 to octa ab or a+b mode, you get a audio signal lose some DB, if you do some test as I did, you will know what I m talking
The bass should always in mono! That was a rule of thumb for production!
I thought dark trinity setup( mk2 machine) face a real problem was a4 track to main is stereo and main out to octa input is stereo, and octa track also get a pan parameter in amp page, multiple stereo audio chain and different way of a4 and octa to handle stereo maybe the reason bass become weaker and audio volume lose.