Audacity is an audio recorder and editor used in Mac OS X, Linux, Windows, and other operating systems. It was developed by a group of volunteers and remains an open-source software. Audacity has gone through a series of updates and was recently updated to bring its latest version of Audacity 2.3.3 which came to replace all the other versions for macOS, Linux, and Windows. Using audacity you have the ability to:
Edit MP3, Ogg Vorbis or even AIFF sound files.
Record audios – Audacity enables recording of live audios through a mixer or microphone. It also allows digitized recordings from other
Ability to convert records and tapes into digital CDs or recordings
Copy, cut, splice and also mix sounds
Alter the speed of pitch during recording
Add new effects into your recordings
Import / Export – Through Audacity you can edit, import and even combine sound files. In addition, you can also export the recordings you
have done in all the supported formats. You can export many files at once.
Plugins – Audacity supports LV3, LADSPA, VST, and Audio unit effect. One good thing is that you can write your plug-in. It's free and has other massive features and therefore a good software to try.