# EDLM — Test real-world e-drum latency

> Test real-world e-drum latency (iPhone/iPad app by ONYX Apps.)

- Source: https://appshunter.io/ios/app/edlm/id1436617159 (this page in markdown: same URL + `.md`)
- Developer: [ONYX Apps](https://appshunter.io/developer/356553882)
- Category: Utilities
- Price: $19.99
- Age rating: 4+
- Requires: iOS 18.0 · 4 MB
- Released: 2018-09-22
- Data updated: 2026-08-12
- User reviews in markdown: https://appshunter.io/ios/app/edlm/id1436617159/reviews.md

## What is EDLM?

>>> Check out the demo videos at onyx3.com/EDLM

E-Drum Latency Meter was developed specifically for measuring latency in electronic drums. The app uses an audio adapter to connect to the input and output points of an e-drum system and provides automated and accurate latency measurements.

EDLM app sends a trigger pulse to the module while simultaneously recording and waiting for the drum sound to arrive. It then calculates and stores the time difference between the two moments. This cycle is continuously repeated at different intervals as the accumulated data is used to estimate the average latency and jitter amounts.

The app requires an external audio adapter or interface.


## Version history (last 5 releases)

### 1.0.5 — 2026-04-22

- Fixes a bug where buffer sizes were not set correctly on iOS 18

### 1.0.3 — 2025-01-28

- Updated to comply with App Store requirements

### 1.0.2 — 2021-12-14

- Updated to comply with App Store requirements

### 1.0.1 — 2018-11-15

- Fixed mic permission issue with iOS 12.1

### 1.0 — 2018-09-20

No release notes.

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All apps by ONYX Apps: https://appshunter.io/developer/356553882

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*