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ARPJAM Studio

ARPJAM Studio

AUv3 generative synth, sampler

6 ratings
3 reviews
🎵 Music
$12.99

Details

Released
June 4, 2026
Updated
October 30, 2026

Features

Developer

Takashi Tsunoda
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About

This app generates unique musical phrases using user-defined rules and probability. It features multiple sound engines, including arpeggiators, a bass synth, a drum machine, and a sampler, allowing for live performance and recording.

✓Generative synth engines
✓Sampler with audio recording
✓On-screen playable keyboard
✓MIDI keyboard support
✓AUv3 plugin compatibility
✓WAV recording and export
✓Background playback
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+4

What's New in ARPJAM Studio

2.13.0

October 30, 2026

• New AUv3: "ARPJAM MIDI". Load ARPJAM as a MIDI effect, straight into an AUM MIDI channel or a Loopy Pro MIDI slot. It sends the phrases from ARP A, ARP B, DRUMS and BASS, plus the LFO CCs, as MIDI only, with no sound of its own. Incoming MIDI passes through.

More

Events

Read more about BASS Now Sends MIDI
AvailableMajor Update

BASS Now Sends MIDI

Drive any synth with the self-playing bass

Oct 16, 2026 — Nov 14, 2026

Read More

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User reviews

Most RecentHighest RatedLowest Rated

devoted developer!

i don't think i've ever seen such frequent updates on an already great instrument—but it's much appreciated! excellent work!
GGBRRRL

Response from developer

Thank you — that means a lot. Since you wrote this, BASS has become a machine of its own, and PHRASE brings that same generator to the arpeggiators. Both came out of what people asked for. If there is something you would like it to do, please write to office@twelvetone.jp.

Exellent!!!)

Plz auv3 host midi to Daw to rec. (Cubasis3) Exellent arp! Very good.
IInRate

サクッとJamれそう！シンセできない人こそ触って欲しい！

ルーパーみたいに簡単に設定できて、気づけばなんかジャムれそうな楽曲できてたー！楽器ができなくても譜面読めなくても、最低限の音楽知識さえあれば何かが生み出せます！楽器できなくても、iPadだけ持ってふらっとどっかの音楽バーのジャムセッション行ってこれを繋げば、みんなと音楽で会話できそう🎵
りりさうぇすてぃん

Response from developer

ありがとうございます。「気づけば曲になっていた」と書いていただいたのが、 まさに作りたかったところなので、とても嬉しいです。 その後、ベース専用の BASS マシンと、アルペジオでも同じ生成が使える PHRASE が 加わりました。ぜひ試してみてください。

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FAQ

What kind of music can ARPJAM Studio create?

ARPJAM Studio excels at creating unique, ever-changing musical phrases based on your defined rules. It's designed for generative music, where each playback offers a different sonic texture rather than pre-programmed sequences or loops.

Does ARPJAM Studio have ads?

No, ARPJAM Studio is a paid application and does not contain advertisements.

What devices does ARPJAM Studio support?

ARPJAM Studio is available on Mac, iPhone, and iPad, and was previously supported on iPod.

How often is ARPJAM Studio updated?

The latest version, 2.13.0, was released on October 30, 2026. Updates are frequent, ensuring the app remains current with new features and improvements.

Can I use ARPJAM Studio with other music software?

Yes, ARPJAM Studio functions as an AUv3 plug-in, usable as an instrument, effect, or MIDI effect within compatible DAWs. It also supports Ableton Link and MIDI Clock for synchronization.

What is the age rating for ARPJAM Studio?

ARPJAM Studio has an age rating of 4+, making it suitable for a wide range of users.

How does the sampler in ARPJAM Studio work?

The sampler allows you to record one bar of audio from your microphone, line input, or even the app itself. You can then slice and rearrange this audio using the same generative rules as the arpeggiators.

What makes ARPJAM Studio's sound generation unique?

Instead of AI, ARPJAM Studio uses your defined rules for key, scale, density, and complexity, combined with probability, to generate distinct musical phrases. This ensures that the output is always unique and shaped by your input.