Videomaker – Learn video production and editing, camera reviews › Forums › General › Basic video with audio -BAnd › I’m not sure if I understand
I'm not sure if I understand the question, but I'll take a stab at it.
Almost all cameras in that price range will have at least a 1/8" stereo audio input jack. If you take your pre-recorded music and split it into two outputs – one to your room and one to the 1/8" jack, you can play along with the pre-recorded music while you videotape yourself. This will bypass the camera mic and show you playing with the pre-recorded audio. No synching up later.
Hoepfully this is what you are looking for.