The Alesis SR16 is a classic drum machine that has been favored for its wide range of options and its realistic sound. Whether you just want some help songwriting or you need live accompaniment for a show, the SR16 makes it easy to compose and save your own rhythms. That’s why the Alesis SR16 drum machine is also revered by remix engineers.The 233 sounds are available in both dry form and sampled with digital reverb. Whichever you prefer, the Alesis SR-16 drum machine produces incredibly natural drum sounds. They let you play along seamlessly with any other musical instruments. It features 16-voice polyphony and 7-position user programmable panning. Each pad is named for different drums or percussion instruments, making up a complete kit. The Dynamic Articulation feature means that drum sounds change their tonal content when played harder, just as real percussion instruments do. The device has 12 velocity-sensitive pads with this Dynamic Articulation audio modulation feature implemented. All 233 tones are available to every one of these 12 pads. They each offer a velocity response of eight loudness levels or 127 when using MIDI.Build-in rhythmic variations, with A, B, and two Fill sections, flexible programming and editing features, velocity-sensitive pad buttons, and a footswitch input give you plenty of composition tools. It also has complete MIDI implementation, allowing these drum machines to interface with electronic drum kits, keyboards, and computers. It also allows these components to access 120 of the machine’s 233 total tones. The footswitch jacks are dual-function, offering both start/stop and count/A/B/fill functions. Additional features include stereo samples with ambiance and reverb, step editing, and sound-stacking.The SR-16 machine offers a timing resolution of 96 ppq, or pulses per quarter note. It offers a time signature range of up to 128 beats per pattern. Its tempo range is 20 to 255 bpm, or beats per minute. The device includes 12,000 notes, 400 patterns that have 200 for user and 200 presets, and 100 songs. It also includes 50 user kits and 50 more preset kits. The unit features two types of sync functions: both a MIDI-clock sync and a song position pointer sync. The 50 preset patterns are not simply programmed sound but actual recordings made by live studio performers. The rear of the Alesis SR-16 features two pairs of built-in stereo ports: main and auxiliary left and right outputs. It includes a tape input and output, and the necessary ports for MIDI and footswitches. Finally, the power supply port and power on/off switch can be found here.The unit features 16-bit sample and 18-bit DAC resolution. It weighs 9.25 inches by 1.5 inches by 6.5 inches, and it weighs 2.5 pounds. Useful accessories include a Sound Chart and power supply. For power, the unit uses a CSA and UL approved 9 VAC external transformer. The underside of this musician’s gear even contains a list of basic instructions and a chart of all the presets. With one of these Alesis accessories, it takes almost no time at all to start creating customized rhythms and composing and recording your own original music.