An item that has been professionally restored to working order by a manufacturer or manufacturer-approved vendor. This means the product has been inspected, cleaned, and repaired to meet manufacturer specifications and is in excellent condition. Full manufacturer's warranty and free one year extended warranty from Gigasonic. Teenage Engineering OP-1 packs a synthesizer, sampler, and controller into a simple and fast interface. The synthesizer features 8 built-in engines (with exchangeable architecture) with 8 quick-selection keys, and 3 great sequencers, enabling instant live tweaks. You can control modulation in real time and work over a wide range of parameters with the ADSR envelope, multi-effects, and LFOs (low frequency oscillators). One of the LFOs is also controlled by a motion sensor for enhanced sound effects. The built-in 4-track tape recorder not only lets you record your work, but also allows overdubbing with changeable pitch and reverse recording in real time. Additionally, the 4-channel mixer allows you to use the built-in EQ and drive, for adding texture and effects to your recording.Connect your computer to the standalone OP-1 Synthesizer via USB to convert it into a fun-filled digital audio workstation. The 4 rotary encoders and 8 x 2 quick selection keys enable instant access to play, stop, record, forward, and rewind functions. The synthesizer can also be used as a mass storage device for exchanging audio files with your PC / Mac. Easy-to-use, the OP-1 Synthesizer sports a smart color-coded interface with color graphics on its OLED display. The display is directly related to the 4-color rotary encoders and legend on the keyboard.Furthermore, this portable synthesizer comes with a long battery life of 16 hours in operation, and over 2 years of standby time, making it ideal for travel and long studio sessions. It features a durable light grey painted CNC aluminum body and has no visible screws. In addition, the OP-1 Synthesizer is packed in an environment-friendly paper foam case that can be reused. A compact 24-button (not velocity sensitive) synth you can use to make music anywhere, even where there's no AC power 8 x synthesizer engines with exchangable architecture let you create tons of unique sounds Synthesizer engines include: Dr Wave raw 8-bit yupe sound engine, FM synthesis engine, Pulse square wave engine, String physical modeling, Digital raw engine, Phase distortion engine, Cluster multiple wave engine, and the ability to expand with future synth engines Built-in 24 Voice Instant Live Sampler lets you sample from the onboard mic, FM radio (optional antenna required), or line-level source DBOX drum synthesizer provides up to 12 seconds of sampling per slot 4 track Tape Recorder with Variable Tape Speed lets you record in a wide range of playback speeds, including reverse Included storage provides 6 x minutes recording time (expandable up to 24) 4-track mixer with EQ, Effect, Drive and Master Out controls Multiple exchangable effects include: classic delay, hacked phone, punch, grid based echo, spring reverb, and the ability to add future effects with software upgrades Multiple exchangeable sequencers includes pattern (grid) sequencer, endless sequencer, and Tombola random sequence generator Battery powered (non-removable lithium-ion cell) for up to 16 hours use on one charge USB for MIDI Controller and file interchange functionality 3-axis (G-Force) motion sensor assignable to any synth, envelope, effect parameter or to pitch Color-coded vector based user interface Instant reverse and variable "tape speed" recording with full classic tape editing capabilities Master tempo with Beat Matching to Tape Feature Built in speaker for headphone-free monitoring Compatible with a wide selection of simple and effective add-on accessories Machined aluminum housing Sound Engine Type(s): 8 x Digital, 2 x Sampling Number of Keys: 24 Other Controllers: Variable + 3 Axis Motion sensor (G-Force) Polyphony: 24 Notes Wave Memory: 512MB (expandible) Number of Effects: 5+ Effects Types: Classic delay, hacked phone, punch, grid based echo, spring reverb, and the ability to add future effects with software upgrades Sampling: Yes Audio Playback: Internal 4-track Sequencer: Yes (pattern (grid) sequencer, endless sequencer, and Tombola random sequence generator) USB: 1 x Mini-B Audio Inputs: 1 x 1/8" stereo Audio Outputs: 1 x 1/8" stereo MIDI I/O: via USB Height: 0.53" Width: 11.1" Depth: 4.02" Power Supply: 16-hour battery