Audio Modify Mp3 WAV OGG WMA

 

Audacity
Excellent Open Source app fpr modifying audio tracks. You can record sounds and edit them as you like, including Cut and Paste, 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 Echo, Change Tempo, and Noise Removal. The GUI is nice and simple, for a great audio software.

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OVERALL: EXCELLENT

MP3 Gain
MP3Gain analyzes and adjusts mp3 files so that they have the same volume.

MP3Gain does not just do peak normalization, as many normalizers do. Instead, it does some statistical analysis to determine how loud the file actually sounds to the human ear.
Also, the changes MP3Gain makes are completely lossless. There is no quality lost in the change because the program adjusts the mp3 file directly, without decoding and re-encoding.

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OVERALL: EXCELLENT

MP3 Splitter and Joiner (Shareware)

MP3 Splitter & Joiner is a very useful MP3 audio editor. It builds MP3 Splitter (MP3 Cutter) and MP3 Joiner in one, you can split, cut, trim a large MP3 file into multiple smaller pieces or join, merge multiple MP3 files to a larger one. It's fast and easy to use!  Anyway it costs 25$...
 

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OVERALL: QUITE GOOD

DBPowerAMP e EASY CDDA Extractor (Freeware e Shareware)
These two applications can easily convert audio files from a format to another. More informations in ripping/encoding.

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