AC DC - Hells Bells by MidiSoundSynth published on 2022-08-04T14:06:05Z MSSKontaktSF2 GM + GS, is a compressed soundfont in proprietary "sfkr" format. Carefully produced with samples of realistic instruments selected from the best KONTAKT libraries, created and aimed especially at musicians, singers and home studio recording lovers. Our proprietary "sfkr" format compresses the normal soundfont into "sf2" format reducing the space occupied in Mb by about 70% without compromising the audio quality of the original soundfont.