# CAVES - Drone synthesizer — Portable drone synthesizer

> Standalone dual-oscillator drone synthesizer for ambient music and sound design. (iPhone/iPad app by Carl Albert Groner.)

- Source: https://appshunter.io/ios/app/caves-drone-synthesizer/id6748933661 (this page in markdown: same URL + `.md`)
- Developer: [Carl Albert Groner](https://appshunter.io/developer/1828121220)
- Category: Music, Entertainment
- Price: $4.99
- Rating: 5.00/5 from 3 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 17 · 7 MB
- Languages: American English
- Released: 2025-07-23
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/caves-drone-synthesizer/id6748933661/reviews.md

## What is CAVES?

CAVES is a dual-oscillator standalone drone synthesizer app for crafting evolving ambient textures, deep soundscapes, and experimental tones directly on your iOS device.

  SOUND ENGINE
  • PWM Oscillator - Classic pulse-width modulation for warm, analog-style tones
  • FM Oscillator - Frequency modulation for complex, evolving timbres
  • Dual Filters - Dual filters with resonance control for tonal shaping
  • Flexible Routing - Route each oscillator to either or both filters

  MODULATION & DYNAMICS
  • 2 LFOs - Modulate frequency, filters, effects, and more for movement and evolution
  • 2 ADSR Envelopes - Shape filter cutoff and amplitude over time
  • Clock-Sync Option - Lock modulation to tempo for rhythmic textures

  EFFECTS
  • Distortion - Add warmth and saturation
  • Stereo Delay - Spacious echoes with feedback control
  • Reverb - Lush ambience and depth


  STANDALONE APP
  CAVES is currently a standalone synthesizer. AUv3 plugin support is planned for a future update.

  Perfect for ambient / drone compositions, sound design, and sonic experimentation.

## Key features

- Dual-oscillator sound engine
- PWM and FM synthesis
- Dual resonant filters
- Flexible oscillator routing
- Dual LFOs for modulation
- ADSR envelopes
- Built-in distortion, delay, and reverb

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/caves-drone-synthesizer/id6748933661/reviews.md

### 5/5 — Yes, Yes, YES!

*2026-03-14*

Now I can read about the Maya in my Kindle reader and listen to my favorite drones! Thank You! Very much. From a musical aspect, the only ‘other’ basic feature that I can think of is for ‘CAVES -‘ to play nicely with other apps, like a synthesized percussion app or another synth app like Moog Animoog app. B-}>

**Developer response:** Background audio is a great suggestion! Thanks for the review & feedback.

### 4/5 — Be nice if it played in background

*2026-03-07*

Boy is the App Store a mess these days. Says 1 review when I have one that i can edit but Apple only shows one of someone else’s. Double-digit IQs are killing us.

This app is fun but if this developer doesn’t add background play, then they relegate their app to just a novelty that you can’t even read while it plays in the background. ## 

Sounds great. I love the .01 rates on the LFOs! With both LFOs slow on different waveforms they almost phase in a ‘self-generating’ sort of way. They need more targets. Essentially everything could bd targets. Caves goes silent in the background, it doesn’t yet support playing in the background. That’s a bummer. But “Yikes”, to quote Leonard Hofstadter’s mother! 10 seconds after hitting Start and I’m drooling all over the place. Reset is an excellent idea! :-) I’m going to be going where no music has gone before! It also stops playing when my iPhone goes to sleep.

**Developer response:** Background audio is a great suggestion! Thanks for the review & feedback.

### 5/5 — Thank You! Thank You! I thank you!

*2026-02-25*

Just saw the update, not that I was constantly checking. :-) Now to check it out on iOS 17.6! Yahooo! OmmMmm… As Caves goes silent in the background, it doesn’t yet support playing in the background. But “Yikes”, to quote Leonard Hofstadter’s mother! 10 seconds after hitting Start and I’m drooling all over the place. Reset is an excellent idea! :-) I’m going to be going where no music has gone before! It also stops playing when my iPhone goes to sleep.

**Developer response:** Background audio is a great suggestion! Thanks for the review & feedback.

### 5/5 — ☝️

*2026-02-14*

Beautiful

### 3/5 — Needs auv3 capability

*2025-07-27*

Great drone synth, very nicely thought through. It needs auv3 then it will go from being a toy to being a decent little synth for drones. And then I’ll give you five stars. Also the ability to change the tuning of the synth.

**Developer response:** Thanks for the feedback! I’m looking into AUv3 support and hope I’ll be able to include this in a future release.

## Frequently asked questions about CAVES

### What kind of sounds can I create with CAVES?

CAVES is designed for crafting evolving ambient textures, deep soundscapes, and experimental tones. It features dual oscillators (PWM and FM) and dual filters for versatile sound shaping.

### Does CAVES have ads?

No, CAVES does not contain advertisements. It is a paid application.

### What devices does CAVES support?

CAVES is supported on iPhone and iPad devices.

### How often is CAVES updated?

The latest version is 1.6, released on March 14, 2026. Future updates are planned, including AUv3 plugin support.

### What is the price of CAVES?

CAVES is available for a one-time purchase of $4.99.

### Can CAVES sync with a tempo?

Yes, CAVES offers a clock-sync option to lock modulation to tempo, allowing for rhythmic textures.

### What effects are included in CAVES?

CAVES includes built-in effects such as distortion for warmth and saturation, stereo delay for spacious echoes, and reverb for lush ambience and depth.

### What is the age rating for CAVES?

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

## Version history (last 5 releases)

### 1.6 — 2026-03-14

Background audio support

### 1.5 — 2026-02-25

Expand device compatibility

### 1.4 — 2025-10-13

• Fixed factory preset - improved default sound
• Improved filter initialization for better audio quality
• Enhanced patch loading stability

### 1.3 — 2025-08-18

Patch saving & loading functionality added.

### 1.2 — 2025-07-29

Fix info & documentation links, misc small UI improvements.

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| [Dronage (Legacy)](https://appshunter.io/ios/app/dronage-legacy/id6753718074) | 5.0 (4) | $9.99 | Music |
| [FFT AUv3 Visualizer](https://appshunter.io/ios/app/fft-auv3-visualizer/id6746331702) | 5.0 (1) | $0.99 | Music |
| [VAPolyMk4](https://appshunter.io/ios/app/vapolymk4/id6753038075) | 5.0 (1) | $14.99 | Music |

## More apps by Carl Albert Groner

- [KICK - Drum synthesizer](https://appshunter.io/ios/app/kick-drum-synthesizer/id6756529563)

All apps by Carl Albert Groner: https://appshunter.io/developer/1828121220

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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 2026-08-29.*