.PTCOP File Extension
File TypePxTone Audio File
What is a PTCOP file?
PxTone tracker audio format, created by Pixel, the Japanese programmer behind the game 'Cave Story'; is an evolution of the music engine used for Cave Story, Organya.
Both of Pixel's PTTUNE and PTCOP music formats can be opened with Piston Collage / PxTone, a music creation software program.