Free 100% In-Browser Tool

Online Drum Machine: 16-Step Beat Sequencer & Synth

Create and play 16-step drum beats with synthesized kick, snare, and hi-hats.

Quick Answer:Click the 16-step grid buttons to program Kick, Snare, and Hi-Hat patterns, adjust the BPM slider, and hit Play to hear your beat loop seamlessly.

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How to Use the Online Drum Machine: 16-Step Beat Sequencer & Synth

1Click on grid steps (1 through 16) to activate Kick, Snare, or Hi-Hat hits.
2Select a preset beat (Hip-Hop, House 4-on-the-floor, Rock, Trap) or build your own from scratch.
3Adjust tempo in BPM to change playback speed.
4Hit 'Play' to hear your synthesized rhythm sequence loop.

Formula & How It Works

Web Audio Drum Synthesis

Kick: Osc.freq.exponentialRampToValueAtTime(0.01, t+0.5) | Snare: NoiseBuffer + Osc

Synthesizes analog drums using frequency pitch drops, bandpass filtered white noise, and gain envelopes.

Worked Examples

Classic House Beat

Input: 4-on-the-floor kick (steps 1, 5, 9, 13), offbeat hi-hat

Explanation: Iconic electronic dance rhythm.

Result: 124 BPM driving dance groove

Boom Bap Hip-Hop

Input: Kick on 1 & 11, Snare on 5 & 13

Explanation: Timeless 90s boom bap beat.

Result: 90 BPM classic hip-hop groove

Basic Rock Beat

Input: Kick 1 & 9, Snare 5 & 13, 8th-note Hi-Hats

Explanation: Foundational drumming pattern.

Result: 110 BPM rock drum groove

Frequently Asked Questions

How does this online drum machine generate sound?▼

It uses pure Web Audio API synthesis (oscillators, noise buffers, and ADSR gain envelopes) without relying on heavy external audio samples.

Can I program my own custom beats?▼

Yes, click any square on the 16-step grid to turn drum hits on or off for Kick, Snare, and Hi-Hat.

What is a 16-step sequencer?▼

A 16-step sequencer divides a standard 4/4 musical measure into 16 sixteenth-notes, allowing precise groove programming.

Can I adjust the playback tempo?▼

Yes, use the BPM slider to adjust speed anywhere between 60 BPM and 200 BPM in real time.

Can I clear the board and start over?▼

Yes, click 'Clear Pattern' to reset all steps and build a brand-new rhythm.

Is this tool free?▼

Yes, Toolzy music tools are 100% free with no registration required.

Quick Reference & Conversion Table

Genre Preset	Standard BPM	Key Pattern Characteristics
Four-on-the-Floor (House)	120 – 128 BPM	Kick on every quarter note (1, 5, 9, 13), offbeat hats
Boom Bap Hip-Hop	85 – 95 BPM	Syncopated kick, hard snare on 2 and 4 (steps 5 and 13)
Rock Standard	100 – 120 BPM	Kick on 1 and 3, snare on 2 and 4, steady 8th-note hats
Trap Groove	140 – 160 BPM	Rapid 16th-note hi-hats, half-time snare on step 9

⚠️ Common Pitfalls to Avoid

•Programming every step on all instruments, creating a chaotic wall of sound instead of leaving rhythmic space.
•Leaving tempo too slow for dance patterns (house music thrives between 120 and 128 BPM).

💡 Practical Real-World Uses

•Songwriters sketching quick drum grooves for guitar or vocal composition.
•Music teachers demonstrating rhythm, tempo, and measure divisions to students.
•Producers testing beat patterns before programming them into hardware drum machines.

Last reviewed & updated: 2026-11-10

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