The sound with flats can be muffled and indistinct, or it can be crisp, clear, and precise. It's how you set the amp's EQ. So, no, they won't prevent you from hearing your technique problems if you listen carefully to what you're playing.
Now, when I was younger, the only people who used tape-wound strings were the guys who didn't know how to play bass. The strings helped them get a sound that had NO definition to the pitch at all, so it didn't matter what notes they played...
John
that does NOT mean you cant get a clear tone from tapwounds, listen to Joe jackson's Look sharp album.
