What exactly are the “MED.” files?
AMP host some exotic formats exclusively created on the Amiga (you can also find formats like “DBM.”, “AHX.”, “AON.”, “OKT.”,…). The “MED.” suffix means that the file has been composed with Octamed, which is a 8 channels tracker. That’s quite an amazing coding trick if you think that the Amiga had a limited amount of 4 audio channels.