I’ll tell you a few other advantages of tracks…

You get basslines that move intelligently TOWARDS the next chord, because they know what they are, not jump to the next chord because they have no clue what the next one will be until you play it!

You get musical voice leading between chords, for the same reason. Parts that don’t jump around, but play the closest inversion to what was just played.

You get drummers that don’t repeat the same fill every time throughout the song.

You get far more than four basic grooves per song.

You get no restrictions on how many or what type of effects each individual track has. No worrying about if you have enough insert effects to put that tremolo and slap back on the guitar amp and still enough left over for the phaser on the Rhodes and a good Leslie on the B3 and a compressor on the overheads of the drum kit.

You generally get guitar tracks played by real guitarists.

And, after getting enough different multitrack backing tracks (all referenced to a click), you have a HUGE library of drum grooves, percussion grooves and live guitar grooves that are easy enough to splice, dice and reuse any way you feel like.

Tired of a song the same way every time? Fly in a different song’s drums or percussion. Play a different bassline. Replace out the guitars using a guitar loop VSTi or your arranger’s guitar mode. It will all lock together because the audio is clicked in the first place.

Tracks only spoon feed you if you let them… 🎹😋
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An arranger is just a tool. What matters is what you build with it..!