Multitone Analyzer is an app designed to explore audio electronics performance by producing quick measurements using a simple loop-back configuration. MA produces a specific set of test tones that are sent to a digital-to-analog converter (DAC) that are then passed through one or more analog components and then received by MA and analyzed. MA both, plays the signals and records them for analysis. DAC and ADC are required for this to work.
Measurements that MA can produce: TD+N, IMD, N+D, delay, clock drift, frequency response, etc.
Audio support for WASAPI, ASIO, and Direct Audio devices with sampling rates of up to 384kHz/32 bits
Test signals: arbitrarily large multi-tone signal, simple sine waves, two-tone IMD test signals, 3-tone IMD test signals, square wave, triangle wave
FFT sizes of up to 1M
For distortion measurements a range of frequencies to measure can be selected
Test your audio equipment, online. AudioCheck gives you access to an extensive collection of sound tests, playable online and downloadable in high-quality for patrons. The audio material provided here will help you assess the audio equipment connected to your computer. Using this website, you will be able to:
Test your hearing, speakers, headphones, digital-to-analog converters… and more!
Design your own sound tests using our high quality waveform generators.
Download our sound files to your favorite audio player, and use your player as a portable audio test device.
Spek (IPA: /spɛk/, ‘bacon’ in Dutch) helps to analyse your audio files by showing their spectrogram. Spek is free software available for Unix, Windows and Mac OS X.
Features:
Supports all popular lossy and lossless audio file formats thanks to the FFmpeg libraries.
Ultra-fast signal processing, uses multiple threads to further speed up the analysis.
Shows the codec name and the audio signal parameters.
Allows to save the spectrogram as an image file.
Drag-and-drop support; associates with common audio file formats.
Auto-fitting time, frequency and spectral density rulers.
The Complete Stereo Imaging And Analysis Tool. StereoTool offers ultra-precise control of input gain and individual pan for left and right channels, accurate visual feedback reflecting the signal content with; a vectorscope, PPM meters for inputs/outputs, phase correlation meter permanently monitoring the signal and individual left and right polarity reversal – No dongle or registration required – 100% Freeware!
Friture is an application to visualize and analyze live audio data in real-time. Friture displays audio data in several widgets, such as a scope, a spectrum analyzer, or a rolling 2D spectrogram.
This program can be useful to analyze and equalize the audio response of a hall, or for educational purposes, etc.
The name Friture is a french word for frying, also used for noise in a sound.
Friture helps you to understand audio data with several widgets:
… a small utility for analysis of audio mpeg files and detection of the encoder used (when layer III).
Further, mp3guessenc can detect many details about the mpeg audio stream and print out lots of useful information.
Supported streams are mpeg 1, mpeg 2 and unofficial mpeg 2.5 – layer I, layer II and layer III of course. Xing tag, lame tag, VBRI tag, Id3 tags (both 1.x and 2.x), APE tags (both v1 and v2), Lyrics3 tags (both v1 and v2) and MusicMatch tag (any version) are detected as well.
Features:
scan mpeg 1/2/2.5 streams, layer I/II/III
guess encoder used (lame/gogo/xing/helix/fhg(new, old and ancient)/blade)
also detects mp3pro and mp3surround streams (even with OFL)
support for large files (up to 2^60 bytes!)
free format streams supported
full statistics for the stream (audio mode, frame histogram, block usage, ancillary data)
crc16 verification
vbr tags by xing/lame + VBRI tag by fhg
detection of ID3 v1/v2 + APE tags + Lyrics3 tags + MusicMatch tag
While working at the music and neuroimaging lab at Beth Israel/Harvard Medical School in Boston, I developed a quick online way to screen for the tonedeafness. It actually turned out to be a pretty good test to check for overall pitch perception ability. The test is purposefully made very hard, so excellent musicians rarely score above 80% correct. Give it a try!
aveX is a free software for running and monitoring ABX listening tests. It works as a Jack (Jack Audio Connection Kit) client and is able to send test-status messages over a network for monitoring purposes. ‘A’ and ‘B’ audio files are read in pairs from a list and played in randomized order, the ‘X’ audio file is also randomized and is either ‘A’ or ‘B’ (double-blind test).
The listening test results are written after every choice in a file in text format.
The program is configured by filling in a very simple XML file.
AudioCheck gives you access to an extensive collection of sound tests, playable online and downloadable in high-quality for patrons. The audio material provided here will help you assess the audio equipment connected to your computer. Using this website, you will be able to:
Test your hearing, speakers, headphones, digital-to-analog converters… and more!
Design your own sound tests using our high quality waveform generators.
Download our sound files to your favorite audio player, and use your player as a portable audio test device.
WaveSurfer is an open source tool for sound visualization and manipulation. Typical applications are speech / sound analysis and sound annotation / transcription. WaveSurfer may be extended by plug-ins as well as embedded in other applications. Features:
Customizable – users can create their own configurations. Localization support.
Extensible – new functionality can be added through a plugin architecture.
Embeddable – WaveSurfer can be used as a widget in custom applications.
Transcription file formats – reads, and writes HTK (and MLF), TIMIT, ESPS/Waves+, and Phondat. Support for encodings and Unicode.
MP3val is a small, high-speed, free software tool for checking MPEG audio files’ integrity. It can be useful for finding corrupted files (e.g. incompletely downloaded, truncated, containing garbage). MP3val is also able to fix most of the problems. Being a multi-platform application, MP3val can be run both under Windows and under Linux (or BSD).
The most common MPEG audio file type is MPEG 1 Layer III (mp3), but MP3val supports also other MPEG versions and layers. The tool is also aware of the most common types of tags (ID3v1, ID3v2, APEv2).
This is a program for stretching audio. It is suitable only for extreme sound stretching of the audio (like 50x) and for applying special effects by “spectral smoothing” the sounds. It can transform any sound / music to a texture. The program is Open-Source and it’s released under the version 2 of the General Public License. You can download the source code for Linux or the Windows binaries.
The Audio File 