Teenage Engineering OP-1 portable synthesizer

via this auction
"Synthesizers

Multiple Synthesizer Engines with exchangeable Architecture.
8 dedicated instant sound select keys

Sound Engines

Dr Wave – Raw 8-bit yupe sound engine
FM – Easy to tweak FM synthesis engine
Pulse – Square wave type engine
String – Physical modeling with a twist
Digital – Raw digital type of engine
Phase – Phase distortion engine
Cluster – Multiple Wave Cluster

Feature additions of Engines will be available with software upgrades

Sample Engines

Dedicated instant Synth Sampler with 6 seconds sampling time for each slot.
Dedicated instant Drum Sampler with 12 seconds sampling time for each slot.
With automated layout feature.
Instant sampling with built-in Microphone or Line in

Envelopes

Classic ADSR type of envelope
Dynamic Envelope for Drum sounds.

Future additions of Envelopes will be available with software upgrades

Effects

Multiple Effects with exchangable Architecture.
Delay – Classic delay type
Phone – Hacked phone effect
Punch – Adds punch to your sound
Grid – Grid based echo
Spring – Spring reverb type

Future additions of Effects will be available with software upgrades

Tape Feature

4 individual tracks with instant Solo
Instant variable Tape Speed
6 minutes recording time in Normal tape speed.
Up to 24 minutes recording time in Low tape speed
Loop function with movable region
Tape tricks for Break Tape, Bits and Reverse.
Memo 1 & 2 for instant memorizing Effects / EQ / Pan or Levels / Tape Speed
Reverse Recording
Classic Tape editing Features Lift / Split and Drop
Lift tape recordings back into Sampler for endless sound design."