PaulStretch ~ Paul’s Extreme Sound Stretch


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.

hypermammut.sourceforge.net/paulstretch

DFasma ~ Compare Audio Files In Time & Frequency


DFasma is free open-source software which is used to compare audio files in time and frequency. The comparison is first visual, using waveforms and spectra. It is also possible to listen to time-frequency segments in order to allow perceptual comparison. It is basically dedicated to analysis. Even though there are basic functionalities to align the signals in time and amplitude, this software does not aim to be an audio editor.

Features:

  • Can load about 25 different audio formats (thanks to libsndfile or libsox).
  • Shows spectrogram, amplitude, phase spectra and group delay.
  • Can play a filtered sound given a selected frequency band.
  • Rectification of the spectrogram tilt (cepstral lifting).
  • Can create and edit segmentation files.
  • Can create and edit fundamental frequency (F0) files (thanks to REAPER).
  • Runs under Linux, Mac OSX and Windows.

dfasman - ss1.4_2comparison

gillesdegottex.github.io/dfasma

Baudline ~ Visual Signal Analyzer


Baudline is a time-frequency browser designed for scientific visualization of the spectral domain. Signal analysis is performed by Fourier, correlation, and raster transforms that create colorful spectrograms with vibrant detail. Conduct test and measurement experiments with the built in function generator, or play back audio files with a multitude of effects and filters. The baudline signal analyzer combines fast digital signal processing, versatile high speed displays, and continuous capture tools for hunting down and studying elusive signal characteristics.

Explore, Analyze, and Discover.

baudline

Linux / MacOS / Unix

Website
Downloads
Twitter
Wikipedia

Baudline Mystery Signal Of The Month

Every month a new mystery signal is posted. Can you identify it?

Monthly Mystery Signal

Tau Analyzer ~ Audio Source Verification


Tau Analyzer is a free program, which can help you to distinguish with reasonable accuracy the original studio-based CDs from poor quality fakes, that have been “reconstructed” using a lossy audio source, such as mp3. Using this program you can check the authenticity of your purchased or borrowed music CDs.

Tau Analyzer features an intuitive user interface, allowing users to work directly with audio CDs, and has some additional functions such as spectrum and frequency analyzers, ATIP and ISRC data readers, etc.

tau_analyzer_main_window

tausoft.org

Spectro ~ Audio File Analyzer


Spectro is a freeware audio file analyzer for Windows. Currently capable of reading FLAC, APE, MP3 and WAV files. Spectro lets you view vital data about compressed audio files and creates a spectrogram of the wave data. This allows you to quickly and easily spot quality issues with a file and also look for transcodes.

spectro

spectro.enpts.com

foo_verifier ~ Foobar Audio File Verifier


Checks specified media files for decoding errors. Note that with most formats, its accuracy is limited to detecting errors that abort the decoding process.

Capture_foo_verifier_results
Website
Documentation

After installing this Foobar plugin, you’ll have two new menu choices under the right mouse click context menu: Utilities > Verify integrity and Utilities > Verify album with Accuraterip

It’s also possible to see more information if you go to File > Preferences > Advanced > Tools > File Integrity Verifier and enable Verbose AccurateRip Output

Lacinato ABX ~ Comparing Track Quality


Lacinato ABX is the only cross-platform ABX and shootout blind testing software for audio. It allows double-blind ABX testing of audio files (seeing if you can tell which file is being played), as well as “shootouts” (picking your favorite from a shuffled, anonymized list). Or you can just use it as a convenient way to switch between files (maintaining the current play position, if you like.

Lacinato ABX

Website
Web Service ~ online version
ABX Testing ~ Wikipedia