# RUN4 — Tape & Texture Machine for iPhone & iPad

A four-track instrument for tape loops, sampling, granular textures and live performance. Made by Eugen Schott for iPhone and iPad.

## Capture, shape, sequence, perform

Record a sound, overdub a loop, resample an idea and turn it into a performance. RUN4 combines a tape workflow with samples, synthesis and patterns in one touch instrument.

## Three ways to work with sound

Tape handles recording, looping, overdubbing and freeze. Poly brings samples, synth voices and hosted AUv3 instruments into patterns. Disc is for playing and performing longer audio.

## Movement and texture

Shape tracks through Grain, Tone, Color and Air. Use modulation, effects, macros and punch-in controls to develop a sound while it plays. Patterns support up to 64 steps, Euclidean tools, probability and parameter locks.

## Standalone and AUv3

Use RUN4 on its own or in a compatible AUv3 host. The standalone instrument can also host compatible AUv3 instruments and effects. MIDI, Bluetooth MIDI and Ableton Link connect it to the rest of your setup.

## Keep the session, finish the idea

Save projects on the device or use optional iCloud synchronisation between iPhone and iPad. Export a finished mix or individual audio stems. File export and offline bounce are standalone features.

## TÓLF: the optional expansion

TÓLF adds twelve more tracks with synth, sampler and granular voices, plus pattern generators, Arp and Strum. Record its tracks back into RUN4’s tape workflow. TÓLF is a separate one-time in-app purchase.

## Questions and answers

### What is RUN4?

RUN4 is Eugen Schott’s Tape & Texture Machine: a four-track music-making app combining tape loops, sampling, granular processing, synthesis and sequencing.

### Does RUN4 work on iPhone and iPad?

Yes. RUN4 is designed for iPhone and iPad. The App Store lists iOS 17.0 or iPadOS 17.0 and later; check the listing for current device compatibility.

### Can I use RUN4 as an AUv3 plugin?

Yes. RUN4 works standalone and as an AUv3 effect, source or instrument in a compatible host. Its standalone app can also host compatible AUv3 plugins.

### Is TÓLF required?

No. RUN4’s four-track instrument works without TÓLF. The optional one-time purchase expands it with twelve additional tracks.

### Where can I find the manual and support?

The official RUN4 website provides a browser-based manual, a video guide and a support page. Use the links on this page for the complete workflow and help.

## Official links

- [Product page](https://eugenschott.de/run4/)
- [Original product website](https://ha1dcre.github.io/run4-web/)
- [Manual](https://ha1dcre.github.io/run4-web/manual.html)
- [App Store](https://apps.apple.com/app/run4-tape-texture-machine/id6789147144)
- Developer: [Eugen Schott](https://eugenschott.de/about/)