HZ Detect
A4 Tuning Analyzer & Frequency Meter for precise pitch detection
What is HZ Detect? Complete Overview
HZ Detect is a specialized tool designed for musicians, sound engineers, and audio enthusiasts who require precise pitch detection and frequency measurement. It serves as an A4 tuning analyzer and frequency meter, allowing users to accurately measure the pitch of musical notes, particularly focusing on the A4 reference tuning. The tool is ideal for tuning instruments, analyzing sound frequencies, and ensuring concert pitch accuracy. It is accessible via a web interface and requires microphone access to function, making it convenient for both casual and professional use.
HZ Detect Interface & Screenshots

HZ Detect Official screenshot of the tool interface
What Can HZ Detect Do? Key Features
Pitch Detection
HZ Detect provides real-time pitch detection, displaying the frequency of the input sound in Hertz (Hz). This feature is essential for musicians tuning their instruments to the correct pitch.
A4 Tuning Analyzer
The tool specifically analyzes the A4 note, which is the standard concert pitch (typically 440 Hz). It shows deviations from the standard pitch, indicating whether the note is flat or sharp.
Frequency Meter
Beyond pitch detection, HZ Detect acts as a general frequency meter, useful for various audio analysis tasks where precise frequency measurement is required.
Quality Indicator
The tool includes a quality indicator that helps users assess the accuracy and stability of the detected pitch, ensuring reliable measurements.
Browser Extension
HZ Detect offers a browser extension for easier access and enhanced functionality, allowing users to quickly launch the tool without navigating to the website each time.
Best HZ Detect Use Cases & Applications
Instrument Tuning
Musicians can use HZ Detect to tune their instruments accurately. By playing a note and observing the frequency display, they can adjust their instrument to match the desired pitch, ensuring perfect tuning.
Vocal Training
Singers and vocal coaches can utilize the tool to train pitch accuracy. By singing into the microphone, they can see real-time feedback on their pitch and make necessary adjustments to stay in tune.
Sound Engineering
Sound engineers can employ HZ Detect for precise frequency measurement during recording or live performances, ensuring that all audio elements are perfectly tuned and harmonized.
How to Use HZ Detect: Step-by-Step Guide
Visit the HZ Detect website (https://hzdetect.com) and ensure your microphone is connected and functioning properly.
Click on 'Grant Mic Access' to allow the tool to use your microphone for audio input. This step is crucial for the tool to detect and analyze sound.
Play or sing the note you wish to analyze. The tool will display the detected frequency in Hertz (Hz) and indicate whether the note is flat, sharp, or at concert pitch.
Use the quality indicator to ensure the measurement is stable and accurate. Adjust your instrument or voice as needed based on the feedback provided.
For extended use, consider installing the HZ Detect browser extension for quicker access and additional features.
HZ Detect Pros and Cons: Honest Review
Pros
Considerations
Is HZ Detect Worth It? FAQ & Reviews
Yes, HZ Detect is currently available for free, offering all its core features without any cost.
While the web version works directly in your browser, you can also install the HZ Detect browser extension for easier access and additional functionality.
HZ Detect works on any device with a microphone and a modern web browser, including laptops, desktops, and mobile devices.
HZ Detect provides highly accurate pitch detection and frequency measurement, especially when used in a quiet environment with a good-quality microphone.
While HZ Detect focuses on A4 tuning, it can measure the frequency of any note, making it useful for tuning other instruments as well.