cool, i figured it was something like that! I wonder if it would be a cool mechanic to use in a game where the frequency forces the melody of the music into and out of tune, or if that would be too jarring.
That could definitely be a cool idea! I toyed with a few options of conveying the player being close to matching the enemy frequency but a lot of them were too jarring, like having the sine wave fluctuate and warp the further away the player was. Music was a last minute inclusion (I always forget the SFX), but it could've been a neat idea to play around with!