# Model610 - Synth Controller — Sequential Circuits Six-Trak

> iOS controller for Sequential Circuits Six-Trak synthesizers with patch management. (iPhone/iPad app by Bill Mitsakos.)

- Source: https://appshunter.io/ios/app/model610-synth-controller/id979456894 (this page in markdown: same URL + `.md`)
- Developer: [Bill Mitsakos](https://appshunter.io/developer/979456893)
- Category: Music, Utilities
- Price: $19.99
- Rating: 4.70/5 from 12 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 1 MB
- Languages: American English
- Released: 2015-04-17
- Data updated: 2026-06-03
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/model610-synth-controller/id979456894/reviews.md

## What is Model610?

Model610 is an indispensable tool for owners of the Sequential Circuits Six-Trak synthesizers.  

Features:
- Hands on control of all synthesis parameters in an intuitive layout
- Special MONO and STACK modes for new sound and performance possibilities
- Built in patch librarian for easy patch naming and management
- Automatic patch backup to the cloud
- Easy configuration via dedicated design.

Requirements:
- A Sequential Circuits Six-Trak Synthesizer
- An iOS capable MIDI interface (or network MIDI solution)
- Any iPad running iOS 8.0 or later

## Key features

- Hands-on synthesis parameter control
- MONO and STACK modes
- Built-in patch librarian
- Automatic cloud patch backup
- Easy configuration

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/model610-synth-controller/id979456894/reviews.md

### 5/5 — Wow

*2019-12-27*

Mono Mode is Amazing , Well thought out GUI , Easy to navigate right away ..Makes patch creation easy and fun , hearing sounds I’ve never heard before come out of my Six Trak Works perfect on older IPad mini iOS12.4.4 ...Crashes and Won’t open on IPad Pro iOS13.3

**Developer response:** Hi Laura,
Please update Model610 to versions 1.1.1 which fixes the crash on iOS13.
Thanks,
B

### 1/5 — Not working on my iPad Pro 11

*2019-12-05*

It opens for a split second and then disappears.

**Developer response:** Hi 77James,

There was a bug that caused a crash on iOS 13 and up.  An update that should work for you is now live in the app store (version 1.1.1).  Apologies that it took so long to get the fix thru.  Please let me know if you continue to have issues on your ipad pro 11.

- B

### 5/5 — Thank you🤘🏻

*2018-05-25*

This app turned my tedious Sequential Circuits Six Trak to an awesome sound creation workstation. Now I can create new sounds quickly while having fun exploring through the app. I only wish for you to continue upgrading the program and make it even more awesome!

### 5/5 — Revitalizes old synth!

*2016-05-19*

Just Velcro an iPad mini to your sequential MAX :-) glad this app exists, just got a MAX and this makes it useful

### 5/5 — Wowza!!

*2016-03-17*

If you've got a Sequential Circuits Six Trak then you should buy this. This app opens up a whole new way of tweaking parameters and creating patches on the Six Trak. I tried using a lemur template and there's no comparison... this app does so much more. The developer obviously put a lot of love into this app. Buy this app, you won't regret it.

### 5/5 — Takes the six-track to a whole new level!!!

*2015-04-21*

Before this app, creating original sounds was a painstaking shot in the dark. Now I can dial in and experiment with new sounds super quickly and name them whatever I want. The visual envelope controls rule!!!  Opens up some new possibilities, like tweaking patches in stack mode or arpeggios on the fly.

All these features for the same price as the firmware upgrade ROM from wine country.

**Developer response:** Thanks for this feedback vlad comp

## Frequently asked questions about Model610

### What is Model610?

Model610 is an iOS application designed to provide hands-on control over all synthesis parameters for the Sequential Circuits Six-Trak synthesizer, offering new sound and performance possibilities.

### Does Model610 have ads?

No, Model610 does not contain advertisements. It is a paid application that offers a complete, ad-free experience for controlling your Six-Trak synthesizer.

### What are the requirements to use Model610?

To use Model610, you need a Sequential Circuits Six-Trak Synthesizer, an iOS-capable MIDI interface (or network MIDI solution), and any iPad running iOS 8.0 or later.

### How does Model610 help with patch management?

Model610 includes a built-in patch librarian that allows for easy patch naming and management. It also features automatic patch backup to the cloud, ensuring your sound designs are safe.

### What is the price of Model610?

Model610 is available for a one-time purchase of $19.99. This price grants you full access to all features without any additional in-app purchases or subscriptions.

### How often is Model610 updated?

Model610 was last updated on August 30, 2023, to version 1.2.1. This indicates a commitment to maintaining and improving the application over time.

### What devices does Model610 support?

Model610 is compatible with iPhone, iPad, and iPod devices running iOS 8.0 or later. Its design is optimized for the larger screen real estate of iPads.

### What is the age rating for Model610?

Model610 has an age rating of 4+. This suggests it is suitable for a wide range of users and does not contain content inappropriate for younger audiences.

## Version history (last 5 releases)

### 1.2.1 — 2023-08-30

Bug fixes and usability improvements

### 1.2 — 2020-04-13

Support for iPhone devices.  BLE MIDI support fore wireless connection to hardware.

### 1.1.1 — 2020-04-08

Updated to support latest iOS version.

### 1.1 — 2015-05-17

Redesigned MONO and STACK modes no longer require a roundtrip MIDI connection.
Critical bug fixes.

### 1.0 — 2015-04-16

No release notes.

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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 2026-06-03.*