RAM Music Machine was a hardware add-on for the ZX Spectrum and Amstrad CPC 464/664[1][2] released in 1986.
[3] It was more advanced than the earlier SpecDrum and it could play melody samples, drum patterns or be used as an echo machine.
[4] It also had MIDI ports to connect to synthesisers.
[5][4] By 1990 the hardware was advertised with a price of £50.
[6][7] Notable users include a teenaged Aphex Twin.