Maybe if you were a mid-19th Century German composer it worked something like that. But that's just not how most songwriting works. E.g., according to Mark Ron

Maybe if you were a mid-19th Century German composer it worked something like that. But that's just not how most songwriting works. E.g., according to Mark Ronson: 1. Amy Winehouse casually spoke the following sentence in a conversation with Mark Ronson: "They tried to make me go to Rehab but I said, 'No, no, no.'" 2. Mark Ronson said, "That could be a song." 3. They went to the studio where Amy Winehouse played a 12-bar blues chord progression on the guitar and sang those lyrics (using a simple pentatonic scale). 4. Mark suggested to speed it up and do a throwback Motown-era arrangement. 5. Done. Unless they recorded their entire conversation, all you'd get is Winehouse sitting down with a guitar and singing the entire hook of the song. If anything, anxiety-fueled "song formation" recordings will just cause songwriters to waste time going in the wrong direction. That is, they'll take their ready-to-go phrases or sub-phrases of music and sing fragments into the mic, in an order that seems as if they are constructing what they already have formed in their ear. Edit: clarification