App overview
Turn your iPhone or iPad into a playable studio with RD4 Groovebox, a compact music-creation app that combines virtual-analog synth voices, drum machines and built-in effects. Work on up to four independent channels, crafting patterns and loops with a responsive multi-touch interface that suits both hobbyists and seasoned producers.
Arrangement and performance modes
Choose how you build tracks and phrases — RD4 supports several workflows so you can sketch ideas quickly or perform them live.
- Use the piano roll and step sequencer to program precise note patterns for each instrument.
- Capture live takes with the app’s real-time recording features to preserve spontaneous performances.
- Create and chain loops on the fly to assemble longer arrangements and evolving grooves.
Sound-shaping tools
Sculpt each instrument by altering its core synthesis parameters and routing effects to taste.
- Tweak oscillators, shape envelopes and dial in filter settings to define the tone of a synth.
- Apply time- and space-based processors such as delay and phaser, along with distortion, filtering, and reverb to add character and depth.
What the paid upgrade provides
Purchasing the premium pack unlocks advanced functionality for exporting, integration and deeper sound control.
- Access MIDI support, including MIDI input and clock synchronization.
- Configure mixer routing and effect busses for more complex signal chains.
- Unlock all drum kits and extra effect modules bundled with the app.
- Export loops, save complete songs, record audio sessions and share sounds externally.
Alternative suggestion
If you want another option, consider eSound — MP3 Music Player (free). It’s a straightforward music player with its own set of features and may suit users looking for a simpler playback-focused tool rather than a full groovebox.
Technical
- iPhone
- German
- English
- French
- Free