Zenn guide: stop comparing ten AI tracks, make one editable

The starting problem the guide names is not a shortage of ideas but a surplus of similar ones. When the generation button keeps producing tracks with a close atmosphere, deciding which to keep becomes the bottleneck, and the desire to take the bass from one take and the melody from another stalls the work entirely.

The proposed split is between a prototyping stage and a repair stage, illustrated with short game background music rather than a full song. The guide is explicit that this is not a measured efficiency comparison; it is a procedure for separating what generation is good at from what editing requires. That is why the instructions begin before any generation happens, narrowing the target to a heavy beat and a simple melody suited to a short screen transition.

The practical hinge is format. A finished audio file does not let you select a single note and change its length, so the guide distinguishes fixes handled by volume or trimming from fixes that require rebuilding the melody. Where a melody must be edited, it favors re-recording a few notes as single sounds over expecting clean extraction from a dense mix, and it advises checking the converted result against the original recording in short alternating passes.