For those who create music and love to play, the Teenage Engineering OP-1 Portable Synthesizer is a pretty impressive instrument. The OP-1 is a fast and straightforward powerhouse that provides a synthesizer, sampler, and controller. For instant live tweak, the Synthesizer features eight built-in engines and three great sequencers. The 24-voice lets you sample from onboard music, FM radio, 4-track tape recorder, and more. You'll get up to 24 minutes of recording time of the 4-track tape recorder. Along with those features, Teenage Engineering also packed it with a four-track mixer with EQ, multiple effects, and a Classic Pattern sequencer.