Frequently asked questions

No — neither the OP-1 nor the OP-1 field has Bluetooth audio output. The only built-in wireless option is the original OP-1's FM radio transmitter, which is noisy and not really meant for clean listening. For good sound, use a wired connection from the headphone/line output, or on the OP-1 field send audio over USB-C to a computer or interface. If you specifically want Bluetooth, run the wired output into a small Bluetooth transmitter.

They solve different problems, so it's not redundant — but you rarely need both. A Decksaver is a fitted hard lid that clips over the keys and knobs to protect the top surface on a desk or loose in a bag; a case or sleeve protects the whole unit in transit. If you mostly carry it in a padded bag, a Decksaver plus that bag is plenty. If it gets thrown around, a proper hard case (the Analog Cases one is a popular OP-1 field pick) can replace the need for a separate Decksaver.

Connect the OP-1 to the iPad over USB (USB-C, plus a camera/USB adapter on older iPads) and put the OP-1 into disk/content mode — it mounts as a USB drive, and the iPad's Files app can browse it to copy tape bounces, recordings, and synth/drum presets off. Alternatively record the OP-1's audio out into an iOS app in real time. The OP-1 field exposes the same USB disk for transferring its content.

Most transfer headaches come down to file format, cable, or disk mode. Make sure samples are 44.1kHz (mono .aif is safest for drum slots), use a USB-C cable that actually carries data rather than a charge-only one, and put the device into its disk/content mode before dragging files. Stay within the per-kit slot and size limits, eject the device properly when you're done, and if a kit won't show up, try a different cable or port before reformatting anything.

Not directly — the OP-1 and OP-1 field apply their effect to the whole mix rather than to a single tape track, so turning on a delay or reverb colours everything at once. The common workaround is to record the part you want affected through the input (or bounce it) with the effect on, then switch the effect off so it doesn't touch the other tracks. It's an extra step, but it gives you per-part effects on a machine that's built around a shared master effect.

There are three common paths. The most flexible is to record the four tape tracks into a DAW — either as one stereo bounce or, if you want stems, track-by-track — and do the final mix, arrangement, and mastering there. Some prefer to stay in-device, using the mixer and master effects and exporting the finished mix. Others merge down to a single track to free up tape while keeping the original layers parked elsewhere on the tape. Pick the DAW route if you want to polish and add parts; stay in-device if the point is to keep the whole thing on the OP-1.

On the OP-1 field, connect over USB-C and it shows up as a class-compliant audio and MIDI device, so you can record its output straight into an iOS DAW or mixer (AUM, Drambo, GarageBand, Logic for iPad) and use the iPad for effects, mixing, and arrangement while playing the OP-1 hands-on. The original OP-1 has no USB audio, so there it's more about MIDI sync and using the iPad for ideas/notation or as a player for backing parts. Either way the iPad is a great companion for finishing what you sketch on the device.

The OP-1 doesn't have built-in microtonal or alternate-tuning scales, so the practical route is multisampling. Build a sampler/drum patch where you place notes tuned to your microtonal intervals across the keys — sample each pitch at the tuning you want, or import a multisample set pre-tuned to your scale — so the keyboard then plays those intervals. It's more setup than a synth with a tuning table, but it lets you perform non-12-TET scales on the device.

Historically the original OP-1 has been finicky to clock with other gear over USB MIDI — it works, but a lot of the long-standing "can't get it to sync" threads come from quirks in how it sends/receives clock. The OP-1 field improved this with more capable USB MIDI. In practice: connect over USB MIDI, set the OP-1 to send or follow clock as needed, and if you're chaining several devices, a USB MIDI host or hub gives you the most reliable results. Expect a bit of trial and error, especially with the original.

That audible "CPU noise" on the external input is associated with the very first original OP-1 (the 2011 mark-1). It was common-enough knowledge a decade ago, and it's why some long-time owners avoided recording external audio on those early units. Later OP-1 revisions and the OP-1 field don't have this issue — owners consistently report clean recordings, and the OP-1 field's mic and input are well-regarded. So if you're hearing it, you likely have an early unit; on a modern OP-1 or the field you shouldn't.

Record the part to a tape track, then use the tape's reverse playback on that section and resample it onto a second track — now the forward and reversed versions sit on separate tracks and play together. You can also reverse the audio in the sampler and re-record it to tape. The trick is committing the reversed pass to its own track via resampling rather than expecting per-track reverse on playback.

No — the OP-1 (and OP-1 field) tape is four tracks by design, with no setting to add more. The usual ways around it: bounce/consolidate by recording two finished parts together onto one track to free the others, play the synth and drum engines live over the tape instead of committing them, or back the tape up and finish the arrangement in a DAW. The OP-1 field keeps the same four-track tape but adds a proper mixer; it does not raise the track count.

Yes, that's a solid price. Original OP-1s have held their value unusually well and often go for more than that second-hand, so $600 for a clean, working unit (or an opened-box one) is a good deal rather than a red flag. Before buying, test every key and encoder, the screen, the speaker, and the jacks, and confirm it charges and takes a firmware update. The OP-1 field is the newer, pricier model — if you specifically want USB audio and the bigger feature set, factor that in, but for the classic OP-1 experience $600 is fair.

Put it into update mode and drop the firmware on as a disk: hold COM while powering on, then select update mode — the OP-1 should mount as a USB drive you can copy the official firmware file onto. This needs the screen and buttons connected to navigate, and is different from "test/T-boot" mode (just holding a key at power-on), which won't mount for a normal reflash. If it boots and chimes but never mounts in update mode, that points to a hardware/connection fault (e.g. the dev board) rather than the OS — check the manual's update steps and the ribbon connections.