[linux-audio-announce] Announcement: Frequency domain audio analysis tools

Silvia.Pfeiffer at csiro.au Silvia.Pfeiffer at csiro.au
Sun Sep 29 23:21:14 EDT 2002

We have recently ported our frequency-domain audio analysis library
Maaate to the Windows platform and fixed some minor bugs and compile

This is the announcement of Maaate Version 0.3.0 available for Linux,
Windows and Solaris.

(It uses bewdy 0.2.2 for visualisation under Linux only.)



Maaate is a C++ frequency domain audio analysis toolkit.


Maaate is a set of libraries supporting frequency-domain based feature
analysis. Although it currently only works on MPEG compressed audio
files in the compressed domain, the interface to plug-in other file
formats (uncompressed or compressed) exists. Maaate also contains some
30 audio feature extraction, segmentation and classification algorithms.
It's all published under the GNU GPL.

Download it from: http://www.cmis.csiro.au/maaate/docs/download.html

Highlights of Maaate version 0.3.0:
- a generic frequency-domain based analysis framework
- a specific MPEG compressed (frequency) domain analysis library
- 30 analysis modules covering 
  * energy features (usable for loudness statistics),
  * bandwidth features (usable for speech/music segmentation),
  * spectral statistics (usable for sound type distinction),
  * silence statistics (usable for speech/music segmentation),
  * noise features (usable for explosion or crowd cheer detection),
  * generic segmentation algorithms (thresholds on features) and 
  * some generic statistical algorithms (histogram, variance).
- extensive documentation on all modules is also available
  online (http://www.cmis.csiro.au/maaate/docs/modules.html)
- works under Linux, Windows and Solaris

Bewdy :

Play around with the compressed audio content of MP3 files under Linux!


Bewdy is a program to visualise frequency domain audio feature analysis
and segmentation algorithms. For example, it can display the spectral
content of an MPEG audio file in the compressed domain and allows you to
play around with analysis algorithms on that data. It uses the (MPEG)
Maaate libraries for that purpose and can thus load up any analysis
module that is implemented for Maaate.

The pictures at http://www.cmis.csiro.au/maaate/snapshots.html and at
http://www.cmis.csiro.au/maaate/bewdy/docs/handbook.html show off more
of bewdy.

Download bewdy  from: http://www.cmis.csiro.au/maaate/bewdy/index.html
Download Maaate from: http://www.cmis.csiro.au/maaate/docs/download.html

About CSIRO audio analysis research:

Here at CSIRO, an Australian government research organisation, we
perform research into the analysis of music and sound. We create
software to unravel the structure and texture of recorded audio, and we
develop systems which make use of the information extracted. Examples of
such systems include searching for music features and indexing
soundtracks. Much of our work is available as open source software. 
See: http://www.cmis.csiro.au/audio/

Silvia Pfeiffer
<Silvia.Pfeiffer at csiro.au>

More information about the Linux-audio-announce mailing list