Amazon.com: teenage engineering OP-1 Portable Synthesizer, Sampler, and Controller with Built-In FM Radio and 4-Track Tape Recorder - 10 Year Anniversary : Musical Instruments
Teenage Engineering's OP-1 finally gets USB audio support a decade after it was released - The Verge
Creative agency imagines Teenage Engineering's OP-1 as a smartphone
Teenage Engineering OP-1 field – Thomann UK
Teenage Engineering discontinues the OP-1, long live the OP-1 Field