Roger Linn’s LinnDrum is the drum machine that brought on a revolution in drum sounds. While not the first, it was the most popular machine to use sampled drum sounds as opposed to the synthesized sounds of the Roland TR-808 and other alternatives. The LinnDrum is often unofficially called the LM2 (or LM-2) because it followed Linn's first machine, the LM-1. A precursor to the Akai MPC series (also first developed by Linn), the LinnDrum lets users sequence up to 12 tracks simultaneously across 56 user and 42 preset patterns, which can be arranged into songs on 49 memory locations. It's still a powerful rhythm-making machine, but they command high prices on the vintage market.