SampleScience has released RX-21 HD Sample Pack, a free Yamaha RX-21 drum machine sample collection. Included in the pack are the clean recordings of the RX-21 drum sounds in 16-bit, 24-bit and 32-bit 44.1kHz wav file format. As a bonus, there are also tube processed samples with 4 round robins and a 80s reverb version of the RX-21 drum kit.
Price: Free.