Drambo by BeepStreet screenshot
Drambo by BeepStreet screenshot

Drambo v2.51 by BeepStreet

The v2.51 update focuses on the step sequencer, adding Additive Mode that allows users to toggle notes without overwriting existing content. By holding a step and using the keyboard, or holding a key and tapping steps, producers can add or remove notes seamlesslyโ€”ideal for refining drums or chords. This mode is now default but switchable in settings, building on prior optimizations for a more intuitive experience.

  • Step Sequencer: New Additive Mode for toggling notes without overwriting
  • Hold a step to toggle notes via keyboard
  • Hold a piano key + tap a step to add/remove notes
  • Great for adjusting drum hits or chord tones
  • Additive Mode now default; switchable in Settings โ†’ Interface

Drambo is a versatile modular groovebox and audio processor for iPhone, iPad, and Mac, enabling users to construct beats, synths, and effects chains with over 140 modules supporting polyphonic processing, MIDI sequencing with parameter locking, and AUv3 hosting. Its adaptive interface automatically connects modules as they are added, eliminating messy cables and allowing nested racks for organization, making it ideal for iPad and iPhone music making where touch-based workflows shine. The app functions standalone or as an AUv3 plugin, with features like a 16-track polyphonic sequencer, clip launcher, scene morphing, and morph groups for parameter blending via a single slider. For mobile creators, Drambo supports MIDI, MPE, and Ableton Link, turning iOS devices into complete music production environments capable of replacing multiple audio plugins like chorus, reverb, or frequency shifters. Its directional left-to-right signal flow prevents instant feedback issues, while physical modeling modules enable innovative sound design, such as turning a table into a playable surface via microphone input.

This universal app excels in generative music and sound design, offering automation with cubic Bezier curves, conditional step components, and community-shared patches via Patchstorage, enhancing collaborative iOS workflows. In iPad/iPhone music making, Drambo replaces hardware by sequencing external instruments or generating custom MIDI CC for modular synths through DC-coupled interfaces, with up to 16 voices per rack and stereo processing. The clean, scalable interface adapts to device orientation, supporting iPhone for portable sketching and iPad for detailed editing, without requiring separate Mac purchases. Overall, Drambo’s innovative modular conceptโ€”cable-less, drag-and-drop, and color-codedโ€”makes it accessible for beginners while providing depth for pros, fostering experimentation in genres from ambient to electronic without traditional modular complexities.

Key features:

  • Unique modular concept: cable-less, drag’n’drop, color coding dynamic interface, automatic connections, and customizable compact, rack views
  • Directional flow makes Drambo routing and patching straightforward
  • Over 140 modules for oscillators, samplers, filters, effects, and sequencers
  • Polyphonic stereo processing with audio-rate modulation16-track sequencer with parameter locks, automation, and clip launcher
  • AUv3 hosting for instruments and effects
  • Morph groups and MIDI/MPE/Ableton Link support
  • Available as standalone app, AUv3 instrument, effect, and MIDI effect
  • Custom modular racks that can be nested, with presets at track, rack, and module level
  • Multiple modulators per parameter without additional mixer modules

Price: $19.99
In-app purchases: Formant Extension, Waves Extension, DSP Extensions 1 (prices vary)


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