# ARPJAM Studio — AUv3 generative synth, sampler

> Generative synthesizer app focused on sound design, no keyboard required. (iPhone/iPad app by Takashi Tsunoda.)

- Source: https://appshunter.io/ios/app/arpjam-studio/id6775859535 (this page in markdown: same URL + `.md`)
- Developer: [Takashi Tsunoda](https://appshunter.io/developer/1884742586)
- Category: Music
- Price: $7.99
- Rating: 5.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 82 MB
- Languages: American English
- Released: 2026-06-04
- Data updated: 2026-08-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/arpjam-studio/id6775859535/reviews.md

## What is ARPJAM Studio?

No sequence. No play button needed.
An instrument that keeps going without you programming anything.

Two generative engines invent phrases endlessly inside the scale and chord you
choose. What you shape is not a song — it is a way of sounding.

Move a control and the sound changes shape without ever stopping. Density,
contour, filter, tape movement. It is built so that nothing you touch can
break it.

And you can play it.
On the key pad or from a MIDI keyboard, right on top of the stream it is
generating. What you play can be captured into the looper.

Now your own sound can go in too.
Record a bar into SAMPLE, the fourth machine, and chopping it up and
rearranging it is the app's job.

■ Generate
• Two independent arpeggio engines (waveform, filter, envelope, effects)
• Eight arpeggio types, chord progressions, ten time signatures
• Drum machine and bass
• Six LFOs, XY pad, performance FX

■ Slice (SAMPLE)
• Record one bar from a mic or line input, with count-in and click
• Record the app itself (ARP A / ARP B / drums), and overdub onto it
• Load audio files — and the audio from a video file
• Up to 32 slices, ordered by the same rules as the arps: direction, reverse,
  octave, probability, groove
• STRETCH (on by default) — change tempo without changing pitch
• Its own filter, envelope and delay / reverb sends

■ Play
• On-screen key pad — always in scale
• MIDI keyboard input (damper pedal, pitch bend, standard control changes)
• One-bar looper that records how hard you played

■ Sound
• Piano — three velocity layers, stereo, damper release
• Electric piano — harmonics shift with how hard you strike
• Waveforms (sine / triangle / saw / square) plus an acid filter
• Delay, reverb, Glitch, Granular, overdrive
• DRIFT / FLUTTER — tape movement on the synth voices and the live input alike
• Concert pitch A=415–444 Hz

■ Connect
• AUv3 plug-in — as an instrument and as an effect
• Ableton Link, MIDI Clock, MIDI out
• External audio input (line / microphone)
• WAV recording and export

One-time purchase. No subscription.

## Key features

- Generative arpeggios with multiple waveforms
- Probability-based drum generation
- Chord progression locking
- Real-time XY pad parameter control
- Assignable LFOs for dynamic sound shaping
- Play pad for layering live input
- Preset saving and sharing

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/arpjam-studio/id6775859535/reviews.md

### 5/5 — Exellent!!!)

*2026-08-15*

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

### 5/5 — サクッとJamれそう！シンセできない人こそ触って欲しい！

*2026-06-06*

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🎵

## Frequently asked questions about ARPJAM Studio

### What is ARPJAM Studio?

ARPJAM Studio is a generative synthesizer app designed for sound design. It allows users to create music by shaping sound parameters without needing to play a keyboard or use traditional sequencing methods.

### Is ARPJAM Studio suitable for beginners?

Yes, ARPJAM Studio is made for those drawn to synths but who can't play keys or don't have time to study theory. It removes the barrier of traditional interfaces to focus on sound sculpting.

### Can I use ARPJAM Studio to create ambient music?

Absolutely. The app's generative nature and focus on shaping randomness allows for the creation of ambient soundscapes, as well as other genres like reggae, by hand.

### Does ARPJAM Studio have ads?

No, ARPJAM Studio does not contain advertisements. It is a paid application that offers an uninterrupted creative experience.

### What devices is ARPJAM Studio available on?

ARPJAM Studio is fully supported on iPhone and iPad, with the landscape studio view being particularly beneficial on iPad for seeing all engines at once.

### Can ARPJAM Studio sync with other music gear?

Yes, ARPJAM Studio supports Ableton Link and MIDI Clock (receive) synchronization, allowing it to play in time with your external hardware and software.

### How often is ARPJAM Studio updated?

The latest version is 1.04, and it was last updated on June 8, 2026. This indicates a recent update, suggesting ongoing development and support for the application.

### What is the price of ARPJAM Studio?

ARPJAM Studio is available for a one-time purchase of $7.99. There are no subscription fees or in-app purchases mentioned.

## Version history (last 5 releases)

### 2.5.2 — 2026-08-26

Fixes.

■ CHARACTER now reaches the ACID filter
With FILTER TYPE set to ACID or ACID SUB, switching CHARACTER to ANALOG left the sequenced notes sounding PURE — while notes you played by hand did use ANALOG, so one patch could sound two different ways. Patches that combine ACID with ANALOG will sound different from this version on: brighter, and a little louder.

■ Keys sound immediately after you stop
Right after stopping playback, a MIDI keyboard or the KEY PAD could take a moment before anything was heard.

■ Held notes are no longer cut off by stopping
Holding a key while the sequence played, then stopping, used to silence the held note as well. It now rings until you lift your finger.

■ No more Japanese text when the app runs in English
Descriptions and status labels on the SYSTEM page, confirmation dialogs and SAMPLE import messages were bypassing the language switch and stayed in Japanese. Thank you to everyone who reported it.

### 2.5.1 — 2026-08-25

A fix.

As an AUv3 plug-in, after the host window was resized, sliding between panels could come to rest part-way instead of on a panel — most noticeably around SAMPLE, and it would return there even after you corrected it.

### 2.5.0 — 2026-08-24

A new voice: CHIME.

■ CHIME
A metal chime bar, built by analysing recordings of the real instrument. Its partials are not whole-number multiples, so it stays clear instead of dissolving into a chord. Lower notes ring longer, and the harder it sounds the brighter it gets. Use the Decay / Release in ENVELOPE to shorten it. You will find it next to ep under WAVEFORM.

Envelope and filter settings are now remembered for four groups — the four synth shapes, PIANO, EP and CHIME. Patches you have already made load exactly as before.

■ A PEDAL bar on the KEY PAD
A full-width bar between the two pads. It works as a sustain pedal while you hold it, so notes keep ringing after you lift your finger. It applies to both ARP A and ARP B, and you can hand it over between fingers.
A sustain pedal on a connected MIDI device now applies to both ARP A and ARP B as well.

■ KEY PAD refinements
• Pressing a key that is already held no longer re-triggers it. As on a real keyboard, the note stops when the last finger lifts
• The column of each note the sequencer plays now lights up

### 2.4.0 — 2026-08-24

Finer control, throughout — on the drums, on the arps, and now on the way out of the app.

■ TUNE on the drums
±12 semitones on KICK, SNARE, HIHAT and NOISE. The filter moves with the oscillator, so tuning down darkens the sound by the same amount. The length never changes, so no amount of tuning drifts the rhythm. LFOs can drive it too.

■ Two more voices each
KICK gains Round (no click, rounded) and Sub (near-pure sine). SNARE gains Dry (short and paper-dry) and Rim (a rimshot). HIHAT gains Soft (warm and light) and Tick (thin and hard).

■ DECAY on the snare
Set how long the snare rings. Choosing a Type loads that voice's natural length, and the slider stretches or shortens it from there. The attack is never squeezed, so the character of the sound stays intact.

■ Fade on SAMPLE
Softens the head and tail of every slice (0–50 ms). Raise it a little when random playback makes the cuts audible. The default is 0 and adds nothing, so the patches you already made sound exactly as before.

■ OCTAVE and a tremolo on the arps
A slider under the 5th that layers the note one octave above — brighter and more forward, without a chordal feel. Unlike the 5th it can never fall outside the scale, so it always sounds.
ARP A and ARP B each gain a tremolo too: it pulses the level while panning left and right. This kind of effect normally vanishes the moment anything sums to mono; this one keeps its pulse through a PA or a phone speaker.

■ Volume and EQ on the master
The output now has a Volume and a three-band EQ (Low / Mid / High). With all three at 0 the EQ is not in the path at all, so everything you have already made sounds exactly as before.

■ The master compressor can be switched off
A busy passage sounding quieter than a sparse one was the output compressor holding it down — it starts working at around four voices, and by eight each part is under half its solo level. Switch it off for live work when you want the dynamics as played, and set where it starts working from −12 to 0 dB (−3.0 dB is what it always was). The switch is handed over smoothly, so it never clicks and the timing does not move. With it off there is no ceiling, so bring Volume down first.

■ Plug-in (AUv3)
The SAMPLE parameters are now exposed to your host — Level, Pitch, Slices, Fade, Density and 31 in total. The arps' Octave and the master's Volume / EQ / compressor are there too. Also fixed: CHARACTER (PURE / ANALOG) did not respond to host automation.

■ Fixes
• Fixed SAMPLE recording silence when neither headphones nor an audio interface were connected
• Removed the noise at the loop seam, on the last slice, and when PITCH was raised
• Removed the crackle when moving SAMPLE's send controls
• Levelled the snare voices against each other
• Removed the REC button from the XY pad (XY moves cannot be recorded)
• Text that stayed in Japanese on an English device is now in English

### 2.3.1 — 2026-08-22

SAMPLE is here — a fourth machine. Your own sound, played back by the same generative rules as the arps.

■ Record
A bar from a mic or line input, with count-in and click. You can also record the app itself — ARP A, ARP B or the drums — and OVERDUB another pass on top of what you already have.

■ Load
Audio files, and the audio from a video file. For long material, RANGE is where you say "this part is one bar". You can drag the range past the end of the material, too — the gap is filled with silence.

■ Slice
Up to 32 slices per bar, reordered by the rules you already know from the arps: direction, reverse, octave, fifth, probability and groove. Each slice can be switched off.

■ Stretch
STRETCH is on by default: whatever you record or load is fitted to exactly one bar, and tempo changes leave the pitch alone. Turn it off and speed and pitch move together, the way tape does.

■ Modulate
Twelve LFO destinations and three PULSE destinations. SAMPLE has its own chord-progression follow, filter, envelope and delay / reverb sends.

■ Undo
One step back — after a CLEAR, or after an overdub that came in at the wrong level.

■ Also
• A velocity slider on the key pad
• SAMPLE added to the key pad, overview, XY pad and the bottom navigation
• Fixed the key pad becoming sluggish while recording
• Removed the click at the loop seam and when you press stop
• Fixed slice lengths changing when you change the time signature

## More apps by Takashi Tsunoda

- [YOKA INSTRUMENTS](https://appshunter.io/ios/app/yoka-instruments/id6760506320)
- [TYPORAIT](https://appshunter.io/ios/app/typorait/id6761259574)
- [ASTROTIMER](https://appshunter.io/ios/app/astrotimer/id6761328042)
- [ARPJAM](https://appshunter.io/ios/app/arpjam/id6762045552)

All apps by Takashi Tsunoda: https://appshunter.io/developer/1884742586

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*