Boots & Cats lets you describe beats in plain language, tweak them in a step sequencer, and export MIDI for your DAW. This manual walks through each piece of the interface with interactive previews so you can practice the flow without leaving the page.
Use the chat to describe the groove, fine-tune it in the sequencer grid, then export MIDI when it feels right. Each piece updates live so you can iterate fast.
The chat input stays focused on quick iteration. Prompts run immediately and can reference instruments, fills, or tempo.
Try phrases like “four-on-the-floor house beat at 124 bpm with claps on the offbeat” or “add a tom fill in the last measure.” The app keeps your last request so you can refine without retyping.
Each row represents an instrument. Sixteenth-note steps line up left to right. Filled steps play; hollow ones stay silent.
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Stopped • 124 BPM • 1/16 grid
This is the live sequencer from the app. Click or drag to toggle steps, switch grid modes, or adjust BPM—the preview mirrors the real experience and plays audio.
These controls update live across the chat and sequencer so you always hear the latest groove.
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Stopped • 124 BPM • Grid: 1/16 • Kit: 808
Starts playback of the current pattern so you can hear changes in real time.
Pauses playback and resets the playhead to the top of the loop.
Wipes all active steps in the pattern—handy for restarting a groove.
Exports the current beat as MIDI without leaving the page.
Type or arrow-key the tempo to match your session. The agent and sequencer stay in sync.
Swap between sixteenth notes and triplet feel to audition different grooves instantly.
Tap play to audition changes instantly. Adjust BPM to match your project, and switch grid mode to explore halftime or triplet variations without losing your pattern.
When you're ready, export it as MIDI. Every track keeps its instrument lane so you can swap drum kits later.
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Tap the download icon to export the beat instantly.
Tap the download icon (⬇) above to open the export modal shown below. Exports run faster than real time on desktop and save files with a consistent base name likebootsncats_124bpm_2025-04-14_16-09-12.
Desktop-only: download the current 2-bar loop as MIDI, full mix, or per-instrument stems.
Preview only — controls are disabled for the manual.
Use when you want to keep arranging or swap sounds inside your DAW.
Great for quick sharing or reference bounces without opening a DAW.
Mix each drum separately or add external processing.
Ask for specific kits, accents, and fills. You can reference kicks, claps, percussion layers, or call out moments like a tom run before the drop.
Prompt ideas:
The sequencer can load one-shots from your browser so each lane hits exactly the sound you want. Tune each instrument ±12 semitones and reset pitch with a click. Use the demo below to see how it works before opening the full app.
Controls are for demonstration only.
Custom kits are unavailable because this browser does not support IndexedDB.
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Switch Kit to CUSTOM to unlock per-instrument samples. Click an instrument name to open the modal, browse your files, fine-tune pitch, or reset that slot. Use Reset Samples to clear every custom file. Your uploads stay in this browser only.
Limits: Max 2.0 MB per file · Max length 10s · Audio stays local.
Upload short one-shot samples (max 2.0 MB / 10s). Files stay in your browser.
Sample updated. Stored locally. Pitch set to +3 st.
A few quick notes to keep sessions smooth.