The Alesis SR-16 is a professional, stereo drum machine which features dynamic articulation and is well suited for songwriters, live performers, and remix engineers. The original SR-16 was 16-bit but was updated to 24-bit for higher quality sound with a lower noise floor. The SR-16 offers a wide selection of 233 realistic, natural sounds both dry and with professional quality reverbs. The dynamic articulation feature enables a drum sound to change its tonal content as it's played harder for truly realistic performances. The 50 on-board patterns were played by top studio drummers with built-in rhythmic variations (A, B, and two Fill sections.) Additionally, you can create and save your own customized patterns and songs. The Alesis SR-16 also provides complete MIDI implementation, 2 footswitch inputs, flexible programming and editing features, velocity-sensitive pads, and includes a power supply. Key Features: - Programmable drum machine for practice, production, and performance - MIDI in/out/thru with comprehensive MIDI support for advanced external control - 233 drum sounds with 24-bit sound engine for dynamic, high-fidelity grooves - Drum sounds are offered both dry and with reverb - 12 velocity-sensitive drum pads for playing grooves manually - 50 preset patterns played by pro drummers, with A/B variations plus two fills for each pattern - Dual pedal inputs for Start/Stop and A/B Fill (requires non-latching footswitches, sold separately) - Deep programmability from a simple interface - Outputs for Main Left, Main Right, Aux L/R, and headphones - 12V power adapter included Tech Specs: Pads: 12, velocity sensitive Sounds: 233 Kits: 50 Patterns: 200 Analog Inputs: 1 x 1/8" stereo Analog Outputs: 2 x 1/4", 1 x 1/4" stereo Headphones: 1 x 1/4" MIDI I/O: In, Out/Thru Power Source: Power supply included Height: 1.5" Width: 9.25" Depth: 6.5" Weight: 2.5 lbs. UPC: 694318001004