Online Drum Machine

Toggle synthesized drum steps, adjust BPM, try presets, and use the browser-based pattern as a lightweight rhythm sketch rather than a full DAW.

BPM

Preset

Stopped16-step pattern · synthesized locally with Web Audio

Pattern density & portable grid

Audit hit density, lane balance and one-loop duration, then copy a compact 4×16 pattern grid for reuse.

Rhythm evidence

Lane	Hits	Density

Practice and playback notes

connects timing, tuning, pitch reference, virtual instruments and music-theory tools without requiring an account. Existing interactive engines remain intact while the new workflow makes it easier to move from a practical task—keep time, tune, play, identify, transpose—to the next relevant tool.

Audio and theory boundaries

Microphone pitch detection depends on the device, room and signal quality. Equal-tempered frequency math does not measure a real instrument, and chord/scale naming can have multiple enharmonic or theoretical interpretations. Reference tones and noise should be used at comfortable playback levels; browser controls do not measure sound-pressure exposure.

Practical guide and verification

Build the pulse before adding density

Start with kick and snare placements that make the bar location obvious, then add hats and claps. A dense 16-step grid can sound busy while still lacking a clear groove, so verify the downbeats before layering subdivisions.

Tempo changes how the same grid feels

The step pattern remains mathematically identical when BPM changes, but articulation and perceived groove can change substantially. Test the pattern near the actual practice tempo instead of assuming a pattern that works slowly will remain clear at a much faster speed.

Presets are starting points rather than style guarantees

A preset can demonstrate common placement, but genre feel also depends on sound choice, velocity, microtiming, swing and arrangement. Use the grid as a rhythmic sketch and evaluate it by listening rather than treating the preset label as a complete production recipe.

Browser scheduling has practical limits

Web Audio can produce stable practice playback, but background-tab throttling, device power saving and CPU load can affect browser timing. Keep the page active for critical practice and use a DAW or dedicated sequencer when sample-accurate production timing is required.

Copy or export evidence before clearing a useful pattern

When a grid matters, preserve the pattern data or a screenshot before pressing Clear. A visual record of active steps, BPM and preset context makes it much easier to reproduce the rhythm than trying to remember the sound after the browser state is gone.