# FuncBud Math Sequencer & Synth — Generative AUv3 MIDI

> AUv3 MIDI sequencer generating musical sequences via mathematical functions. (iPhone/iPad app by Cem Olcay.)

- Source: https://appshunter.io/ios/app/funcbud-math-sequencer-and-synth/id6502771916 (this page in markdown: same URL + `.md`)
- Developer: [Cem Olcay](https://appshunter.io/developer/523633853)
- Category: Music, Entertainment
- Price: $5.99
- Rating: 4.90/5 from 8 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 30 MB
- Languages: American English
- Released: 2024-06-06
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/funcbud-math-sequencer-and-synth/id6502771916/reviews.md

## What is FuncBud Math Sequencer & Synth?

FuncBud is an AUv3 MIDI sequencer app that generates sequences using simple math functions. You can create math functions with the function builder, then chain and repeat them to create complex sequences.

A simple x + 1 function would sequence all the notes in the scale in order. It gets more interesting when you use different formulas and chain them.

The sequencer starts from the root note and evaluates the first formula to calculate the new note. Then, it moves to the next formula. If it's a repeating function, it repeats the specified number of times before moving to the next formula. The formula's result is converted to a note in the working key and scale, within the defined minimum and maximum octaves. This new note is then played. Additionally, the result is stored in a history of up to 64 entries for later sum or product calculations

The function builder lets you create functions with simple addition, subtraction, multiplication and division operations as well as square, square root, sum and product operations. You can also use parentheses to prioritize the calculation order. The newly created function will be saved and accessible in the library across both the standalone app and AUv3 instances. 

With the conditional functions, you can specify a condition like "if this function is greater than that function, then execute the function A, otherwise execute the function B". 
The random function generator will generate a value between two functions, a function for the lower bound and another function for the upper bound. 

The sequencer picks the notes in the current key and scale, between the minimum and maximum octaves. You also have a root note, the starting note, which are all defined at the top of the UI. You can use BrainBud to change the key and scale as well. 

The sequencer speed (rate), gate length, gate length variety, velocity, velocity variety and swing parameters are accessible with the sliders at the bottom of the UI. 

In edit mode, you can change the order of the functions. You can also delete a function in edit mode, or simply by swiping it to the left. 

Newly created patterns automatically copy the current one, making subtle changes easier. If you prefer a clean slate, you can quickly clear the list with the clear button.

The loop detection function is accessible in the settings menu. When enabled, it would detect the loop and increment the 'x' value by 1 to break the loop.

Please note that FuncBud is a MIDI app. The standalone version has an optional internal synth where you can enable or disable on the settings menu. The AUv3 plugin requires an audio app for output. For the AUv3 functionality, it needs to be hosted within an app such as AUM, Loopy Pro, Cubasis, Logic Pro, Nanostudio, Drambo, or apeMatrix.

## Key features

- Mathematical function builder
- Sequence chaining and repetition
- Conditional and random functions
- Key, scale, and octave control
- Adjustable sequencer parameters
- MIDI output
- AUv3 plugin support

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/funcbud-math-sequencer-and-synth/id6502771916/reviews.md

### 5/5 — Another great App!

*2025-08-02*

This is a very novel way of creating music, it puts the ‘fun’ into ‘functional’

### 5/5 — playing with numbers

*2025-01-01*

great fun! playing with numbers to create very musical melodic sequences

### 2/5 — Eigentlich eine interessante Idee…

*2024-09-07*

… nur dass die Rechenausdrücke nicht als FUNKTIONEN, sondern als FOLGEN ausgewertet werden. Für x wird also nicht die Ordnungszahl der Note im zeitlichen Ablauf, sondern rekursiv das vorausgehende Ergebnis eingesetzt. Wenn man zum Beispiel x^2 als Term hat, lautet das Ergebnis nicht 1, 4, 9, 16 …, sondern 1, 1, 1, 1 … — ist ja nicht schlimm, muss man einfach nur wissen. Funktionen sind deterministisch, rekursive Folgen können schnell unvorhersehbar werden. Vielleicht ist das intendiert. — Mich hätte der Ansatz mit den Funktionen mehr interessiert, deshalb habe ich eine Erstattung beantragt.

### 3/5 — x+1 = fun!

*2024-07-16*

This app is fun and surprisingly easy to use.  A great tool for musical exploration.

**Developer response:** Thanks but why 3-stars if you liked the app that much? :(

### 5/5 — Best Sequencer I Never Knew I Needed!!

*2024-07-06*

This app is a complete shock to me. I’m not a math person, but for some reason this way of creating sequences just totally works for me. I get bored very quickly of results with arpeggiators and with all random sequencers. I’ve tried all kinds of approaches to laying down satisfying background sequences and nothing ever satisfies. I can create something deeply satisfying with FuncBud in no time.

The developer is rapidly adding cool new features. Doesn’t need anything at this point, but I’m looking forward to the new surprises awaiting me.

Maybe about once per year an app comes along that vaults to the top of my small list offavorite apps. 2024’s app has arrived.

### 5/5 — Another Fun Bud from the generative sequencer expert

*2024-06-14*

And here comes another approach to generative sequencing for the bud collection! FuncBud is fun. Let maths play and get impressive results. A wonderful and playful app.
My wish for the future: One, and only one array variable to store values, loop through them, etc….

## Frequently asked questions about FuncBud Math Sequencer & Synth

### What is FuncBud?

FuncBud is a paid AUv3 MIDI sequencer app for iOS that generates musical sequences using mathematical functions. It allows users to create complex patterns by chaining and repeating formulas, offering a unique approach to music creation.

### How does FuncBud generate music?

FuncBud uses a function builder where you create mathematical formulas. These formulas are then evaluated sequentially to determine the notes played, allowing for intricate and evolving musical sequences based on mathematical logic.

### Can FuncBud be used with other music apps?

Yes, FuncBud supports AUv3 plugin functionality. It can be hosted within compatible audio apps like AUM, Logic Pro, or Cubasis, allowing its MIDI sequences to be used with other instruments and effects.

### What kind of mathematical functions can I create in FuncBud?

You can create functions using basic arithmetic (addition, subtraction, multiplication, division), as well as square, square root, sum, and product operations. Parentheses can be used to control calculation order.

### Does FuncBud have ads?

No, FuncBud is a paid application and does not contain advertisements. Users can enjoy the full functionality without interruptions from ads.

### What devices does FuncBud support?

FuncBud is supported on iPhone, iPad, and iPod. It is designed for Apple's mobile operating system and can be used on various iOS devices.

### How often is FuncBud updated?

FuncBud was last updated on September 2, 2024, with version 2.4. This indicates active development and regular updates to improve features and stability.

### What is the age rating for FuncBud?

FuncBud has an age rating of 4+. This means it is suitable for users of all ages, with no content restrictions.

## Version history (last 5 releases)

### 2.5 — 2026-07-27

This version
- Adds factory presets to the library and the AUv3 plugin
- Adds online user manual to the settings menu
- Adds built-in sampler to the standalone app
- Updates and improves the audio engine
- Updates the sequencer performance

### 2.4 — 2024-09-02

This version updates the support section on the settings menu.

### 2.3 — 2024-08-01

This version 
- Adds filter cutoff key tracking to the internal synth. 
- Updates the support section of the settings menu. 
- Disables the note filtering for the notes exceeding the max octave depending on the key and scale.

### 2.2 — 2024-07-24

This version adds iCloud support for the presets. 
- The presets will be saved to the iCloud under the FuncBud folder
- They can be shared between multiple iOS and Apple Silicon devices. 
- They can be shared between the standalone app and AUv3 plugin. 
- Your older presets will be saved to iCloud automatically once you create a new preset with the new version.

### 2.1 — 2024-07-16

This version
- Fixes the issue on favoriting a formula on the library. 
- Updates key and scale picker. 
- The scale picker won't close when you pick a scale. 
- You can select and audition a scale when you select one. 
- The scale picker will close when you press the done button on the top right. 
- You can select and audition a key and an accidental.
- The key picker will close when you press the done button on the top right.

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## More apps by Cem Olcay

- [FretBud - Chord & Scales AUv3](https://appshunter.io/ios/app/fretbud-chord-and-scales-auv3/id1234224249)
- [ScaleBud - AUv3 MIDI Keyboard](https://appshunter.io/ios/app/scalebud-auv3-midi-keyboard/id1409125865)
- [StepBud - AUv3 MIDI Sequencer](https://appshunter.io/ios/app/stepbud-auv3-midi-sequencer/id1453104408)
- [RhythmBud - AUv3 MIDI FX](https://appshunter.io/ios/app/rhythmbud-auv3-midi-fx/id1484320891)
- [ArpBud 2 AUv3 MIDI Arpeggiator](https://appshunter.io/ios/app/arpbud-2-auv3-midi-arpeggiator/id1500403326)
- [ChordBud 2 AUv3 MIDI Sequencer](https://appshunter.io/ios/app/chordbud-2-auv3-midi-sequencer/id1526221230)

All apps by Cem Olcay: https://appshunter.io/developer/523633853

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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 2026-08-23.*