Free Audio Editor Software

Audacity

Audacity is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.

Audacity features:

Recording

Audacity can record live audio through a microphone or mixer, or digitize recordings from cassette tapes, vinyl records, or minidiscs. With some sound cards, it can also capture streaming audio.

• Record from microphone, line input, or other sources.
• Dub over existing tracks to create multi-track recordings.
• Record up to 16 channels at once (requires multi-channel hardware).
• Level meters can monitor volume levels before, during, and after recording.

Import and Export

Import sound files, edit them, and combine them with other files or new recordings. Export your recordings in several common file formats.

• Import and export WAV, AIFF, AU, and Ogg Vorbis files.
• Import MPEG audio (including MP2 and MP3 files) with libmad.
• Export MP3s with the optional LAME encoder library.
• Create WAV or AIFF files suitable for burning to CD.
• Import and export all file formats supported by libsndfile.
• Open raw (headerless) audio files using the “Import Raw” command.

Editing

• Easy editing with Cut, Copy, Paste, and Delete.
• Use unlimited Undo (and Redo) to go back any number of steps.
• Very fast editing of large files.
• Edit and mix an unlimited number of tracks.
• Use the Drawing tool to alter individual sample points.
• Fade the volume up or down smoothly with the Envelope tool.

Effects

• Change the pitch without altering the tempo, or vice-versa.
• Remove static, hiss, hum, or other constant background noises.
• Alter frequencies with Equalization, FFT Filter, and Bass Boost effects.
• Adjust volumes with Compressor, Amplify, and Normalize effects.
• Other built-in effects include:
  • Echo
  • Phaser
  • Wahwah
  • Reverse

Sound Quality

• Record and edit 16-bit, 24-bit, and 32-bit (floating point) samples.
• Record at up to 96 KHz.
• Sample rates and formats are converted using high-quality resampling and dithering.
• Mix tracks with different sample rates or formats, and Audacity will convert them automatically in realtime.

Plug-Ins

• Add new effects with LADSPA plugins.
• Load VST plugins for Windows and Mac, with the optional VST Enabler.
• Write new effects with the built-in Nyquist programming language.

Analysis

• Spectrogram mode for visualizing frequencies.
• “Plot Spectrum” command for detailed frequency analysis.

Screenshots:

Audiograbber

Audiograbber is freeware that grabs digital audio from cd's. Audiograbber copies the audio digitally-not through the soundcard-which enables you to make perfect copies of the originals. It can even perform a test to see that the copies really are perfect.

Audiograbber is also capable to automatically normalize the music, delete silence from the start and/or end of tracks, and send them to a variety or external MP3 encoders, such as Fraunhofers L3enc, or even use some MP3/WMA encoders internally for automatic creation of MP3's. Audiograbber can download and upload disc information from the Internet compact disc database: freedb.

You can also record your vinyl LP's or cassette tapes with Audiograbber and make wav's or MP3's of them.

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