https://github.com/fluffy-critter/audiocompress

A dynamic range compressor/volume normalization library
https://github.com/fluffy-critter/audiocompress

Last synced: 24 days ago
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A dynamic range compressor/volume normalization library

• Host: GitHub
• URL: https://github.com/fluffy-critter/audiocompress
• Owner: fluffy-critter
• License: lgpl-2.1
• Created: 2012-06-21T19:00:02.000Z (over 12 years ago)
• Default Branch: master
• Last Pushed: 2012-06-21T19:01:17.000Z (over 12 years ago)
• Last Synced: 2024-05-01T23:31:04.524Z (8 months ago)
• Language: C
• Size: 117 KB
• Stars: 16
• Watchers: 2
• Forks: 8
• Open Issues: 0
• Metadata Files:
  • Readme: README
  • Changelog: ChangeLog
  • License: COPYING

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README

        
AudioCompress v1.5 (2003/07/05)

(c)2002-7 busybee (http://beesbuzz.biz/)

Introduction

============

AudioCompress is a simple one-band dynamic range compressor for

keeping the volume level of an audio stream more or less consistent.

How it works

============

AudioCompress keeps a history of the last few seconds and sets the

amplification so that the loudest peak within that time will be the

reference for normalizing the sound (i.e. that peak will be amplified

to full power).  The amplification is smoothly interpolated and goes

up relatively slowly, and if there's a very sudden loud burst, the

amplification is dropped quickly (which typically isn't noticeable).

Using AudioCompress

===================

As a commandline tool

---------------------

Currently, the commandline tool only accepts raw PCM data on standard

input as 16-bit native-endian signed data.  Fortunately, this is how

most audio players output data when you tell it to use stdout.

So, just pipe the raw PCM out from your player into AudioCompress, and

then into some mechanism of playing sound.  For example, if you're

using mpg321 and esd, the commandline should be something like:

	mpg321 --stereo -s -@ MyPlaylist.m3u | AudioCompress | esdcat

Adjust accordingly for your OS and player and so on.

Runtime configuration from the commandline can be seen by passing the

-h option to AudioCompress.

As an EsounD plugin

-------------------

Unless configured otherwise, the commandline tool can also be used as

an EsounD (esd) filter, by adding the -e [esd host] option; for

example:

	esd -nobeeps &

	AudioCompress -e localhost &

It is highly recommended that you run AudioCompress from the same

system as esd, due to the large amount of bandwidth which audio

filters take up.

Contact Information

===================

Bug reports, patch submission, etc.: fluffy at beesbuzz.biz

Latest version: http://beesbuzz.biz/code/AudioCompress/

XMMS homepage: http://www.xmms.org/