Editor's Overview
SyncRecord is a recorder application developed by Padraic McEvoy, packaged as a single Android APK of version 1.1 weighing in at 3.04 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.
Install Checklist
- Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
- File size is a light 3.04 MB, so it installs quickly even on modest connections.
- This build is signed by "Padraic McEvoy" — always verify the developer name matches what's listed on the app's official store page before installing an update.
- After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
- We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.
About this app
Core Functionality The system achieves temporal alignment and spatial localisation by utilising audible pseudo-random binary sequence (PRBS) signals. Devices emit these sequences, and the system employs cross-correlation techniques on the captured audio to extract propagation delay information. Under test conditions, this approach reduces temporal misalignment across recordings to within 52 samples at 48 kHz (approx. 42 µs) and estimates inter-device distances to within 14mm.
Key Features:
- Ad-hoc mic array creation: Easily initiate a session with a master device and invite other participants via a unique alphanumeric session ID (UID).
- Synchronised Recording: Captures raw, unprocessed audio (using MediaRecorder.AudioSource.UNPROCESSED) from all devices simultaneously.
- Automatic calibration: Performs server-side signal processing to estimate inter-device distances and correct time offsets automatically.
- Flexible deployment: Connects to a cloud-based demonstration server or allows users to deploy their own locally-hosted server instance. Local deployment minimises latency and provides full control over data handling.
- Privacy first: Prioritises transient data handling. In cloud mode, audio data is deleted immediately after the session ends. No user logins are required.
Operational modes:
1. Synchronised recording: Combines localisation and recording, delivering time-aligned, multi-channel audio archives ready for further analysis.
2. Localise array devices: Determines the geometric layout of devices without storing continuous audio streams.
3. Unsynchronised recording: Standard multi-channel capture without automatic synchronisation.
Technical details and requirements:
- Server architecture: This app requires a backend server component for signal processing and session management. You can use the public demonstration server (syncrecord.eu:3000) or deploy your own local instance using the Node.js and Python scripts available in the repository. A docker container is also available.
- Hardware: Requires support for unprocessed audio capture. Note that built-in smartphone microphones are directional; for optimal performance, position devices within audible range and orient them towards the centre of the array.
- License: Source code is available under the MIT License.
Learn more: For detailed methodology, signal processing equations, and evaluation results, please read our pre-print research paper: https://zenodo.org/records/20398119
Repository with server-side files: https://github.com/PadraicMCE/SyncRecord
Details
| Version | v1.1 |
|---|---|
| Size | 3.04 MB |
| Developer | Padraic McEvoy |
| Category | Recorder |
| Package | app.mcevoy.syncrecordapp |
| Android | 4.1+ |
| Last Updated | Oct 29, 2026 |
| Downloads | 6 |
Frequently Asked Questions
Is SyncRecord free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.
What Android version does SyncRecord require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.
Is SyncRecord safe to install?
We link to the exact APK published by Padraic McEvoy. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.
How do I update SyncRecord?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).
Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.
How to Download & Install SyncRecord
- Tap the Download APK button above and save the file to your device.
- Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
- Open the downloaded
app.mcevoy.syncrecordapp.apkfile from your Downloads folder. - Tap Install and wait for Android to finish.
- Open «SyncRecord» by Padraic McEvoy and grant only the permissions it actually needs.
- Revoke the "unknown sources" permission once you are done installing.
Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.
