“The Procussion is a Proteus-era drum & percussion MIDI sound module released in 1991. It's a 32 voice multi-timbral sample based synthesizer with 4 MB of 16-bit percussion samples, selected from the Emulator III sound library and stored in ROM. There are hundreds of drums, percussion, mallets, vibes, etc. and they are all fully editable!
The sounds vary from acoustic to electronic and many sounds have stereo effects. Sounds can be combined/layered with up to four samples mixed into one drum sound or with any of a selection of digital waveforms stored in ROM. Each instrument also has many individual attributes such as tuning, volume, pan, etc. The sounds are arranged into 128 drum-kits, 64 of which are user-programmable. Each kit can have up to 24 drum samples assigned to it. In each kit, individual sounds can be mapped across the keyboard or set of drum pads. Up to 24 Zones may be assigned per kit.
Another feature is Stacks which can be made of up to 4 percussion Instruments. The instruments in a stack can be modulated in many ways or switched on and off depending on various parameters such as velocity or high hat pedal position, etc. A very complete and capable Drum & Percussion kit sound module of the same ilk as Alesis's d DM5. It has been used by Front 242 and KMFDM.” -Vintage Synth