I am checking a backing track for an upcoming rehearsal. A few passages become harsh in the room, while headphones make the problem harder to identify. Before changing the file, I want to rule out the playback chain. We can move the speaker and compare the same section at different levels. What would be a sensible order for those checks? One topic I am reading about is suno fix in this context. I am treating that as context rather than an explanation of what we hear. If both systems reveal the same problem, a small test on a duplicate seems reasonable. I will use the same excerpt for every comparison, write down the playback level, and ask another person to listen before we make any decision about changing the source recording. The goal is comfortable rehearsal playback without losing the accents musicians need to hear.