Stay Within Your Noise Limit With Confidence
Set up a calibrated measurement microphone, enter your venue or council SPL limit, and this software tracks your running Leq throughout the gig. A clear, real-time display shows your fast Leq, slow Leq, and your running compliance figure, so there is no guesswork about whether you are inside the rules.
How Leq Finder Works
Leq Finder takes a live feed from a calibrated measurement microphone and computes your equivalent continuous sound level (Leq) using standard acoustic measurement principles. You enter your SPL limit and averaging window once, and the software tracks your running average against it for the rest of the session, flagging a breach the moment it happens rather than after the fact. A 31-band frequency guide shows exactly which frequencies are pushing the level, so you know what to pull back without guessing. For a full walkthrough of the process, see the step-by-step setup documentation, or watch a visual walkthrough of a typical monitoring session.
Key Features
- Real-Time Leq Monitoring — See your Leq level and current level at a glance, plus a 31-band guide to the frequencies pushing the limit.
- Compliance Tracking — Enter your SPL limit on load and track your running average against it throughout the show.
- Mic Calibration — A simple calibration workflow gets your measurement mic reading accurately within minutes.
- CSV Logging — Every minute of your session is logged automatically, with a full CSV export of per-minute data and period summaries.
- Configurable Time Windows — Set your averaging window to 15 minutes or any period your permit requires, with breaches flagged as they happen.
- Cross-Platform — Built for reliable performance on Windows and macOS (Apple Silicon).
Download Leq Finder
Leq Finder is available for Windows and macOS (Apple Silicon). Download the latest release, install it in minutes, and start monitoring your SPL compliance today. Check what's new in the latest version before you download, or read the installation instructions if this is your first time setting up the software.
Built for Live Sound Professionals
Leq Finder is trusted by live sound engineers who need a lightweight, affordable alternative to dedicated SPL compliance hardware. No specialist noise monitoring equipment is required — just a calibrated measurement microphone and this software.
Frequently Asked Questions
What is Leq?
Leq, or equivalent continuous sound level, is a single figure that represents the average sound energy over a given period, expressed in decibels. Venues and councils commonly set an Leq limit over a 15-minute or 60-minute window as a way of controlling noise nuisance from live events without penalising short, loud peaks.
Why does SPL compliance matter for live sound?
Breaching a venue or council noise limit can mean a warning, a fine, or the show being shut down early. Keeping a real-time eye on your running Leq lets you make small mix adjustments before you approach the limit, rather than finding out about a breach after the event log has already been reviewed.
Do I need a calibrated measurement microphone?
Yes. Leq Finder is designed to work with a calibrated measurement microphone and your existing audio interface, so the Leq figure it reports is an accurate reflection of the sound level at the measurement point.
Can I try Leq Finder before I buy it?
Yes. Leq Finder offers a 7-day free trial so you can test the software on your own system before committing to a purchase. If you run into any issues during your trial, get in touch with the team and we will help you out.