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Drum Replacer

· Last updated：2026-09-24

Detect kick, snare, and hi-hat hits in a drum track or full mix, then layer or replace them with your own samples (or built-in synthesized ones).

Details

What this tool helps you do

A band-limited transient replacer in the Drumagog tradition. Detection runs per drum register with log-compressed spectral flux and adaptive peak picking: kick 20–100 Hz, snare body 150–500 Hz confirmed by a 2–4 kHz crack hit within ±30 ms, hi-hats 6–12 kHz. Every detected hit keeps its strength, and the replacement sample is scaled with it, so the original dynamics survive. Layer mode adds the sample on top; replace mode additionally ducks the original around each hit (attack 2 ms, exponential release, adjustable depth) because true band removal needs real stems — feed a separated drum stem for cleanest results. No samples uploaded? Deterministic synthesized kick (pitch sweep 110→42 Hz), snare (tone + noise), and hat (noise burst) are used instead. Output is a fresh encode in WAV, FLAC, MP3, M4A, or OGG.

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Written by the Elysia Tools team

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Media
Input types
file, select, number
Output type
file
Sample coverage
4
API ready
Yes

Overview

Drum Replacer detects kick, snare, and hi-hat transients across distinct frequency registers and lets you reinforce or swap them with custom samples or built-in synthesized hits. It preserves natural playing dynamics by scaling replacement velocities to match original hit strengths, offering both additive layering and ducked replacement modes.

When to use

  • Reinforcing weak or hollow kick and snare hits in a live drum recording.
  • Swapping recorded drum elements with custom one-shot samples to fit a specific production style.
  • Adding crisp synthesized hi-hat or transient attack over a full drum bus or acoustic mix.

How it works

  1. 1Analyzes the audio using log-compressed spectral flux across specific registers: kick (20–100 Hz), snare (150–500 Hz body with 2–4 kHz crack correlation), and hi-hats (6–12 kHz).
  2. 2Calculates individual hit strengths with adaptive peak picking to maintain velocity dynamics.
  3. 3Triggers custom uploaded audio samples or built-in synthesized tones scaled precisely to the detected strike intensity.
  4. 4Applies either additive layering or ducking on the original track around each transient, exporting the combined result in your chosen audio format.

Use cases

  • Layering punchy electronic kick and snare samples over an organic acoustic drum stem.
  • Replacing dull live snare hits with a sharp, pre-processed snare one-shot using ducked replace mode.
  • Tightening acoustic hi-hat articulation with high-frequency synthesized transient bursts.

Examples

1. Layering Synthesized Hits on a Drum Loop

Music Producer

Background

Working on an indie rock track where the acoustic drum bus lacks low-end punch and top-end presence.

Problem

The original kick lacks sub-bass energy and the hi-hats sound dark in the mix.

How to use

Upload the drum stem, select kick and hats as targets, choose layer mode with medium sensitivity, and export to WAV.

Target: Kick, Hi-hats | Blend Mode: Layer | Sample Level: 70% | Sensitivity: Medium | Output: WAV

Outcome

A reinforced drum track with dynamic low-end sub sweep on kicks and crisp high-frequency ticks on hats alongside the original performance.

2. Replacing a Muddy Snare with a Custom Sample

Mixing Engineer

Background

Mixing a live multi-track session where the snare mic picked up excessive bleed and lacks snap.

Problem

The recorded snare cannot be equalized cleanly without boosting unwanted bleed.

How to use

Upload the snare track, attach a custom snare WAV sample, select snare target, set blend mode to replace with 12 dB duck depth, and export to FLAC.

FAQ

What happens if I do not upload custom samples?

The tool uses built-in synthesized sounds: a 110-to-42 Hz pitch-sweep kick, a tone-plus-noise snare, and a noise-burst hi-hat.

How does replace mode differ from layer mode?

Layer mode adds samples over the original track, while replace mode ducks the original audio around each detected hit using an adjustable attenuation depth.

Can I process a full mix instead of an isolated drum stem?

Yes, but feeding an isolated drum stem yields cleaner transient detection and avoids ducking non-drum instruments.

How does the tool keep the drummer's dynamics?

Each detected transient's amplitude is calculated during onset detection, and the triggered sample's volume scales proportionally to that strike.

Which output audio formats are supported?

You can export the processed audio file as WAV, FLAC, MP3, M4A, or OGG.

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