GoldWave

"Audio Editing, Recording, Conversion, Restoration, Analysis Software"
By SoftCns Editor: GoldWave is a top rated, professional digital audio editor. It contains so many great features, you will be amazed by all the things it can do:
Play, edit, mix, and analyze audio
Record audio from cassettes, vinyl records, radio, etc. through your computer's line-in
Record dictation through a microphone or play dictation back at a slower speed for transcription (with foot pedal control)
Record and edit audio for podcasting or telephone systems
Apply special effects, such as fade, equalizer, doppler, mechanize, echo, reverse, flanger, and more
Digitally remaster and restore old recordings with noise reduction and pop/click filters
Make perfect digital copies of audio CD tracks using the CD Reader tool and save them in wav, wma, mp3, or ogg files
Edit music for dance programs, figure skating, gymnastics
Analyze human speech, bird song, whale song
Demonstrate digital signal processing with filter effects and the Expression Evaluator tool
View a variety of useful real-time visuals and level meters
Convert files to/from different formats, such as wav, wma, mp3, ogg, aiff, au, vox and even raw binary data
Expand functionality with plug-ins
Command line processing
More...
GoldWave is the most reliable and complete audio editor available in its price range. It includes all of the common audio editing commands and effects, plus powerful built-in tools such as a batch processor/converter, a file merger, a CD reader, and audio restoration filters that are expensive add-ons in other programs. Comprehensive, well designed, and easy & fun to use, GoldWave offers the best value in audio editing software. With over 15 years of development and widespread usage, it has an excellent and unmatched history.