Free Online Audio Tests, Test Tones and Tone Generators
Tests your audio equipment, speakers, room acoustics and hearing. Audio signals and test tones playable online. High resolution sound test files available for free download.
LEDR™ - Listening Environment Diagnostic Recording Test - Audio …
The LEDR test generates pinna-filtered audio that will literally float around your speakers, assuming your sound reproduction system is neutral enough to preserve the original signal characteristics. These test signals are not designed for headphone use.
MATT Test - Musical Articulation Test Tones - Audio Check
It was created to help the listener of an audio system to hear and measure the degrading effects of room acoustics on the audio signal. Later, after making some acoustic adjustments in the room, the improved listen-ability of the room can also be heard and measured.
THD - Total Harmonic Distortion - Test Tones - Audio Check
Total Harmonic Distortion (THD) characterizes the linearity of an audio device and is a good indication of the distortion present at its output. Assuming you feed the device with a pure tone, THD will represent its deviation from its pure form.
Online MATT Test | The Listening Test - Audio Check
It was created to help the listener of an audio system to hear and measure the degrading effects of room acoustics on the audio signal. We provide here the updated AudioCheck version (digital). For all variants, including the original analog version, please refer to our MATT Test page.
Sine Sweep - Full Spectrum (20 Hz - 20 kHz) - Audio Check
These audio files scan all audible frequencies from 20 Hz to 20 kHz in a 20 second time span. When the time scale is logarithmic, sweeping between 20 Hz and 40 Hz (one octave) or from 10 kHz to 20 kHz (one octave) will take the same time.
Stereo Polarity (Phase) Sound Test - Audio Check
Our ears are simply not sensitive to the absolute phase (please refer to our Absolute Polarity Blind Test if you don't believe us). However, when using two (or more) speakers, polarity defines how these speakers interact with each other.
Impulse Tone - Audio Check
Acoustic engineers often clap their hands to hear how the room responds back. The clap of the hands is a handy (no pun intended) approximation of an impulse and is sufficient to give the engineer an idea of whether the room sounds right.
Absolute Polarity Blind Listening Test - Audio Check
These files present a monaural acoustic guitar riff, with its original and inverted polarity.
Audio Tests - Audio Check
Test your audio equipment online. Check for frequency response, dynamic range, stereo imaging and more!