@sflorg this is a situation that will confront musicians, particularly those starting in depth in later life, and particularly if sight-reading (playing what is being read) and particularly if playing complex polyphony using both hands and feet - ie an organ... and even accompanying oneself while singing!
Still watching this process as it develops, looking for ways of improving it.
Of all the simultaneity, running multiple limb / auditory processes seems to be the most natural part, while the trickiest still seems to be reading multiple staffs which requires a lot of rapid eye movement, as we only have one binocular fovea and "abstract" visual analysis area while everyday life can require managing lots of limbs and fingers while talking and listening....!
Just how much of the recognition and processing can or _could_ happen in #peripheralVision intrigues me.
It would be interesting to see this study repeated with orchestral conductors who will be familiar with a lot of precise "simultaneous" attention, not least a score with lots of simultaneous staffs!

