The S&KC Mod Loader now has integrated music playback, making this mod obsolete. The HQ music hack is great, but I've wondered if it would be possible to play the original SMPS music. A few days ago, ValleyBell pointed me to the source code of SMPSPlay and over the course of several days we were able to hack together something that played only S3K's music and worked with S&KC. You can download SMPSOUT.DLL here. To use it, simply extract it to Sonic & Knuckles Collection's install folder, and rename it to MIDIOUT.DLL (or MIDIOUTX.DLL to use it as a fallback for the HQ music hack). Features: SMPS playback by ValleyBell Plays Sonic 3's midboss theme in Sonic 3 mode Speed shoes and special stage speedups work perfectly Doesn't make S&KC run faster than it's supposed to The source code is up on Sonic Retro's GitHub, and I may add support for an INI file specifying whether to play the S3 or S&K version of applicable songs. Requires Visual C++ 2013 Runtime.