is there any program that converts mp3 files to mid files?
I play guitar.
You can transcribe a song into a MIDI.

But you can't convert the actual song file into MIDI.
I deeply regret the 6661 in my username. Siiiigh. Damn you, 14 year old me, you edgy little bastard.
No, MP3 is actual waveforms, MIDI is notation. There's programs that can transcribe it but they aren't very accurate.