Keys & harmony
Piano Chord & Scale Lab
Find notes, explore inversions, and hear chords or scales on a playable keyboard.
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Chords for your hands. Numbers for your ears. Practical tools for the next idea.
Guitar & pianoProduction utilitiesRhythm & MIDI
Rhythm & MIDI · VIP member
Swing Grid & MIDI Lab
Build a swung note grid with millisecond/sample positions and export a hi-hat MIDI pattern.
Take your experiment further.
This advanced tool is included with VIP access.
Choose your experiment.
Guitar & harmony
Guitar Chord & Capo Lab
Explore 14 practical chord shapes, see each string’s fret, and hear the sounding notes after a capo change.
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Timing
Tempo, Delay & LFO Lab
Turn a tempo into straight, dotted, and triplet delay times plus tempo-synced LFO rates.
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Sampling
Pitch & Time Matcher
Match source and target tempo. Compare pitch-preserving duration changes with resampling pitch changes.
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Timing
Bars to Duration
Plan loop and arrangement lengths from bars, tempo, and quarter-note beats per bar.
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Tuning
Note to Frequency
Find a MIDI note’s frequency using your chosen A4 tuning reference.
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Mixing
dB & Gain Converter
Convert a gain adjustment into amplitude and power ratios without guessing fader math.
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Delivery
Audio Size Planner
Estimate uncompressed PCM payload size before exporting a long or multichannel recording.
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Rhythm & MIDI
Euclidean Rhythm Lab
Distribute drum hits evenly across a bar, rotate the pattern, audition it, and download a real MIDI clip.
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Rhythm & MIDI
Swing Grid & MIDI Lab
Build a swung note grid with millisecond/sample positions and export a hi-hat MIDI pattern.
VIP memberOpen tool →
Keys & harmony
Harmonic Bridge Finder
Find shared notes between two keys and compare the shortest root transposition for a transition.
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Sampling
Sample-Accurate Loop Planner
Calculate exact target frames, stretch ratio, and trim/pad difference for an intended loop length.
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Mixing
Phase & Low-End Alignment
Translate a phase offset at one frequency into milliseconds and samples for precise alignment experiments.
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