Songwriting…the lyrics, chords and melody and some of the main musical hooks
Pre-Production…locking in the tempo, key, more musical elements, dynamics, implementing groove and structure (length of the intro, bars between sections, outro)
Production…sounds and details and adding drama and inspired performances and magical plugins
Production is really fun when the song is written and preproduction is mapped out.
Production is really clunky when the song is still being written and the flow is…not yet flowing.
All of these three elements can be done along side all of the others but it’s a bigger mental leap having to constantly switch back and forth.