Open Source MATLAB Audio Analysis Software

This project is the MATLAB development of a virtual sound level meter. The program will read in a calibrated .wav file and allow the user to analyze it as one would analyze a sound field with a sound level meter. The software implements Fast, Slow, Impulse and LEQ; A, C and Flat Weighting; Ln and Noise Dose analysis; Octave and 1/3 Octave band analysis; high resolution FFT analysis and spectrograms. Band analysis can be made using fast FFT methods or slower, but ANSI standard methods. Source code requires MATLAB + Signal Processing Toolbox. Developed under MATLAB R2010a (but might work with some earlier versions) Executable version does not require MATLAB and runs under Windows XP, Vista, and Windows 7.

SoundRuler is a tool for acoustic analysis, graphing and teaching. It interactively recognizes and measures 35 temporal and spectral properties of each sound in a file. It also features several measurement, graphing and didactic modules.

CQT-FW(Constant Q transform with Fixed length Window) is a time-frequency transform for multiple pitch recognition in audio signals(songs). The transform CQT(Constant Q Transform) provide analisys frequencies in a exponencial way, like music does, but it have problems with the time resolution. In CQT-FW we have the same frequency resolution as CQT, but with fixed length windows in time, what leads to a constant time resolution as well. And more, time and frequency resolution are not dependent like in CQT end DFT transforms. We also propose a post processing witch eliminate the high order harmonics, leaving only the fundamental frequencies. The transform got good results in a good range of frequencies, but still have problems in low frequencies.

CoRoPa stands for Computational Rough Paths. The aim of CoRoPa is to provide a software framework for various ideas related to Rough Path Theory, including rough differential equations and the digital description of serial data streams.

MATAA (Mat's Audio Analyzer) is a flexible and versatile audio analysis system based on Matlab or GNU Octave. MATAA was removed from SourceForge. Please visit https://github.com/mbrennwa/mataa for further information.

Advanced detection, classification and localization (DCL) of marine mammals and passive acoustic monitoring (PAM). Code is being developed as Matlab routines, interfaces for Ishmael (http://www.bioacoustics.us/ishmael.html), and in other formats.

Open-source content and evaluation framework for music transcription systems. Can be used as monophonic or polyphonic database, through software mixing.

This is a software library for measuring acoustic property with your sound card. It allows users to measure acoustic property without any expensive devices. This is useful for all acoustic engineers/resarchers/students.

PsySoundPro - audio file analysis for objective psychoacoustics measures. Includes measures like Virtual Pitch, Loudness, Etc. etc.

This is a fast C implementation of Arturo Camacho's SWIPE' pitch extraction algorithm. See the project homepage for more about the advantages of the SWIPE' algorithm. swipe-1.0.tar.gz contains the current source, which should compile quite neatly.

Vibrato Toolbox: Parametric Analysis of Musical Vibrato from High-Precision Magnitude/Frequency Tracking Mingfeng Zhang ECE, Univ. of Rochester Part I Analysis of individual music tones This MATLAB toolbox provides signal analysis tools for time-frequency analysis and for parametric analysis of musical vibrato Part II Analysis of multiple music tones or multiple harmonic partials This toolbox allows you to explore a group of audio files, and obtains its related parameters of musical vibrato. [Installation] see more details in the readme files in the zip files. (1) We use some functions in MIR toolbox, please first add in this toolbox to MATLAB: https://www.jyu.fi/hum/laitokset/musiikki/en/research/coe/materials/mirtoolbox MATLAB/file -> set path add folder /Toolbox/ (and the folder for audio files) hit "save"; "close". (2) please also set the folder "F:\THISFOLDER" with code and audio files as "current directory" so the code can read the audio segment.

VibroToolbox is a tool for research and education in vibrometry. Test your audio equipment, describe responses to vibratory stimulation and analyze directionality. It works with precision i/o hardware or simple sound cards, various sensors and speakers.

Detect the most representative part (i.e. chorus) of a given song.

compariSong is an audio tool to support query by singing/humming. It compares a database of popular songs with a hummed-by-user melody and returns the closest matches.

Weakening effect on the MP3 audio encoder and the assimilation of the spectral characteristics of the source. Produced by applying empirical filter (derived from an analysis of a pair of flac-mp3) to the sound in the space R2. 1) Transfer the sound of the space R to R2 (mp3rsrr2); 2) Finding the empirical filter by OLS pair flac-mp3 (mp3rsols); 3) Apply a filter to the sound (mp3rsvalue); 4) Transfer the sound of the space R2 in space R (mp3rsr2r);

I'm trying to create a program to make a weather chart in octave.

Yet Another Audio Feature Extractor is a toolbox for audio analysis. Easy to use and efficient at extracting a large number of audio features simultaneously. WAV and MP3 files supported, or embedding in C++, Python or Matlab applications.