I'll try to record some SFX using the phone output of my PAL-M Mega Drive. (The PAL-M is the NTSC system with a diferent color encoding.) But I know that the volume controller distort some high frequencies. =/ EDIT: My Mega Drive 1 has "HIGH DEFINITION GRAPHICS" on it too. If the modem port you are talking about is the DIN-8 output: so I have it.