Audacity® is a complex tool, you can achieve a lot of things but still, unless you're an audio engineer, a passionate or advanced user, you have to spend some time with the help files. I believe most (novice) users use this software to perform only one or a few functions. For those who never used this program before, I thought it might be a good idea to list a couple of things that Audacity(R) can accomplish.
Features:
For more information on these features, see the Audacity Manual.
Recording
Audacity can record live audio through a microphone or mixer, or digitize recordings from other media. With some sound cards, and on any recent version of Windows, Audacity can also capture streaming audio.
- Device Toolbar manages multiple recording and playback devices.
- Level meters can monitor volume levels before, during and after recording. Clipping can be displayed in the waveform or in a label track.
- Record from microphone, line input, USB/Firewire devices and others.
- Record computer playback on Windows Vista and later by choosing “Windows WASAPI” host in Device Toolbar then a “loopback” input.
- Timer Record and Sound Activated Recording features.
- Dub over existing tracks to create multi-track recordings.
- Record at very low latencies on supported devices on Linux by using Audacity with JACK.
- Record at sample rates up to 192,000 Hz (subject to appropriate hardware and host selection). Up to 384,000 Hz is supported for appropriate high-resolution devices on Windows (using WASAPI), Mac OS X, and Linux.
- Record at 24-bit depth on Windows (using Windows WASAPI host), Mac OS X or Linux (using ALSA or JACK host).
- Record multiple channels at once (subject to appropriate hardware).
Import sound files, edit them, and combine them with other files or new recordings. Export your recordings in many different file formats, including multiple files at once.
- Import and Export WAV, AIFF, AU, FLAC and Ogg Vorbis files.
- Fast “On-Demand” import of WAV or AIFF files (letting you start work with the files almost immediately) if read directly from source.
- Import and export all formats supported by libsndfile such as GSM 6.10, 32-bit and 64-bit float WAV, RF64, and U/A-Law.
- Import MPEG audio (including MP2 and MP3 files) using libmad.
- Import raw (headerless) audio files using the “Import Raw” command.
- Create WAV or AIFF files suitable for burning to audio CD.
- Export MP3 files with the optional LAME encoder library.
- Import and export AC3, M4A/M4R (AAC) and WMA with the optional FFmpeg library (this also supports import of audio from video files).
Supports 16-bit, 24-bit and 32-bit (floating point) samples (the latter preserves samples in excess of full scale).
- Sample rates and formats are converted using high-quality resampling and dithering.
- Tracks with different sample rates or formats are converted automatically in real time.
- Easy editing with Cut, Copy, Paste and Delete.
- Find the spot to edit easily with scrubbing and seeking or Timeline Quick-Play.
- Unlimited sequential Undo (and Redo) in the session to go back any number of steps.
- Edit and mix large numbers of tracks.
- Multiple clips are allowed per track.
- Label tracks with selectable Sync-Lock Tracks feature for keeping tracks and labels synchronized.
- Draw Tool to alter individual sample points.
- Envelope Tool to fade the volume up or down smoothly.
- Automatic Crash Recovery in the event of abnormal program termination.
- Tracks and selections can be fully manipulated using the keyboard.
- Large range of keyboard shortcuts.
- Excellent support for JAWS, NVDA and other screen readers on Windows, and for VoiceOver on Mac.
- Real-time preview of LADSPA, LV2, VST and Audio Unit (OS X) effects.
- Plug-in Manager handles plug-in installation and addition/removal of effects and generators from the menus.
- Change the pitch without altering the tempo.
- Change the tempo without altering the pitch.
- Noise Reduction to remove static, hiss, hum or other constant background noises.
- Alter frequencies with Equalization, Bass and Treble, High Pass, Low Pass and Notch Filter effects.
- Filter a frequency selection created in Spectrogram view or Spectral Selection Toolbar using spectral edit effects.
- Adjust volume with Compressor, Amplify, Normalize, Fade In/Out, Studio Fade Out, Crossfade Clips, Crossfade Tracks and Adjustable Fade effects.
- Reduce or Isolate Vocals given suitable stereo tracks (vocal reduction produces a stereo result).
- Create voice-overs for podcasts or DJ sets using Auto Duck effect.
- Other built-in effects include:
- Echo
- Limiter
- Paulstretch (extreme stretch)
- Phaser
- Reverb
- Reverse
- Truncate Silence
- Wahwah
- Run “Chains” of effects on a project or multiple files in Batch Processing mode.
- Support for LADSPA, LV2, Nyquist, VST and Audio Unit effect plug-ins.
- Effects written in the Nyquist programming language can be easily modified in a text editor – or you can even write your own plug-in.
- Experimental modules that extend the functionality of Audacity.
- Spectrogram view mode for visualizing and selecting frequencies.
- Plot Spectrum window for detailed frequency analysis.
- Sample Data Export for exporting a file containing amplitude values for each sample in the selection.
- Contrast Analysis for analyzing average RMS volume differences between foreground speech and background music.
- Support for adding VAMP analysis plug-ins.
- Licensed under the GNU General Public License (GPL).
- Runs on Windows, Mac OS X and GNU/Linux.
System Requirements:
For Windows
Audacity for Mac is a Universal Binary for OS X 10.6 and later. Audacity runs best with at least 1 GB RAM and a 1 GHz processor (2 GB RAM/2 GHz on OS X 10.7 and later).
For lengthy multi-track projects, we recommend a minimum of 2 GB RAM and 2 GHz processor (4 GB RAM on OS X 10.7 and later).
For GNU/Linux
We recommend using the latest version of GNU/Linux from your distribution that is compatible with your hardware specifications. Audacity will run best with at least 1GB RAM and a 2 GHz processor. Because it was originally written when computers were less powerful, you may be able to run it on much less powerful hardware too. Simple recording is possible on 700 MHz Raspberry Pi, using a USB Microphone.
Note: Some tools, you will have to need download and install for open Software and Download that software.
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