Audacity Mac版这是一款免费的音频录制软件，同时也是一款开源的软件。Audacity Mac版自身为多语含中文版软件初次启动也是英文界面，需要选择语言为Chinese(Simplified)简体中文版，也可以在编辑菜单的最下面一项设置．
Audacity Mac版支持多种平台的快速多轨音频编辑、录制工具，支持WAV, AIFF, Ogg和MP3格式音乐文件，提供编辑、混音功能并提供预置效果、插件和无限次Undo操作。
Audacity is a free audio recorder/editor/mixer. You can record sounds, play sounds, import and export WAV, AIFF, and MP3 files, and more. Use it to edit your sounds using Cut, Copy and Paste (with unlimited Undo), mix tracks together, or apply effects to your recordings. It also has a built-in amplitude envelope editor, a customizable spectrogram mode and a frequency analysis window for audio analysis applications. Built-in effects include Bass Boost, Wahwah, and Noise Removal, and it also supports VST plug-in effects.
Noise Reduction defaults changed
Interface - Spectrogram
New option ‘Spectral Reassignment’. This algorithm deduces a ‘finer’ spectrogram for vocal work.
Four new Spectrogram scales.
Improvement to the Pitch (EAC) algorithm -- cleaner (sharper) display.
Spectrogram Settings are now available per-track.
Upgraded from wxWidgets 2.8.12 to wxWidgets 3.0.2.
Restructuring of the Preferences Menu
Restructuring of the Track Dropdown Menu (for the Spectrograms)
The Noise Reduction "Frequency smoothing" default has been increased to 3 to help avoid metallic artifacts. Resetting Preferences or deleting audacity.cfg will set the new default.
(Windows) The location of Audacity's work-in-progress folder has been changed, to avoid problems where certain disk cleaners treated them as deletable temporary files.
Crashes on reading very large .wav and .mp2 files have been fixed.
测试电脑：MacBook Pro(Osx 10.11.5)