people that play drums or music well – if you're playing a beat say with the cymbal and bass, are these two separate tracks to you: bass and cymbal or one track where they're interleaved?

put another way, can you seamlessly play the beat with one hand while the other stops or starts?

i can't do two different things with one hand each. i feel like im capable of a single track and i play the notes or rhythm as one beat after the other. the same for piano.

i used to drum and dj. what you're describing will come after enough practice. in the beginning you really have to concentrate and think of them independently to play each hand. after enough practice, there will be one moment when your brain just 'gets' it and you can feel it the difference.

it's like that moment in neural network training where there's a sudden drop in loss after enough learning.

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