Yamaha RM-50 Rhythm Sound Module

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Following the success of the RX series, Yamaha launched the Rhythm Programmer RY-30 in 1991 and the rack version RM-50 a little later. It was a response to the successful R8 drum computer from Roland. It has resonant filters (digital emulations) that can be triggered dynamically, which gave it an advantage over the competition in the 1990s. It uses Yamaha's AWM2 engine with 16-bit samples and 22-bit D/A converter. Thanks to the 16-voice sound generation with digital filter, wave layering and extensive parameterization, it can also be described as a drum synthesizer. 

With the RM-50, the internal sample content can be expanded by using wave cards via three card slots. Cards for the RY-30 drum computer and the Yamaha SY-77 and SY-55 Workstations are accepted. The fourth card slot is reserved for data cards, which expand the internal memory for sound programs and drum kits if the 500 presets and 128 user voices as well as the 64 preset and 64 user drum kits are not sufficient. The RM-50 is also used as an audio-to-MIDI converter. In addition to the filters, the sample material can be processed with LFO and Pitch-EG. (Source: Amazona)