SD1 Mastering Studio Cost: $39 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions SD1 Mastering Studio: SD1 Mastering Studio is a professional midifile editor which lets SD1 users customize their GM/GS files with ease. Through graphical controls (such as Virtual Mixer, Drum Mixer, Voice Editor, Vocalizer Editor, Effects editor and so on), users can replace the existing setup bar and get a SD1-customized file.