Interval Based MIDI Keyboard
In Theory is an innovative interval-based MIDI keyboard app featuring a unique keypad design.
The keypad uses interval notation (+2, +1, 0, -1, -2) where 0 plays the current scale note.
+1 plays the next note in the scale, -1 plays the previous note, and so on.
Work with over 110 built-in scales for comprehensive musical exploration.
Import custom scales created in ScaleBud 2 for personalized practice!
Create chord voices with intervals
Build rich chords by toggling additional intervals within the current scale.
Add intervals from octaves above or below for sophisticated extended chords.
Choose from scale notes, flattened, and sharpened intervals for complete harmonic control.
Create unlimited patterns from the pattern selector in the bottom left.
Perfect for composing, practicing, and understanding chord theory.
MIDI Controller Support
Play In Theory with any MIDI keyboard for natural performance.
Middle C4 triggers the root note (0 button), with white keys mapping to positive/negative intervals.
Control chord intervals using MIDI CC messages from your DAW or controller.
Assign MIDI CC numbers and channels to intervals in the settings menu.
Send MIDI CC values 0-62 to toggle intervals dynamically during performance.
Sequence In Theory with apps like PolyBud, ShiftBud, or MelodyBud.
Control multiple synths simultaneously
In Theory preserves MIDI channel information from incoming notes.
Control multiple synths by assigning each to a different MIDI channel.
Works seamlessly with both MIDI note and MIDI CC triggering.
Use multiple MIDI keyboards or controllers with different channels for polyphonic control.
Perfect for live performance setups with multiple sound sources.
Take advantage of the AUv3 Plugin
In Theory operates as both a standalone app and an AUv3 MIDI Plugin.
Create and save AU presets for instant recall of your favorite settings.
Control or automate every parameter using AU parameters.
Use MIDI CC output from ShiftBud for dynamic control.
Change key and scale remotely using BrainBud for seamless workflow integration.
