WaveShop is a free, open-source audio editor. WaveShop is fast, lightweight, and bit-perfect, meaning samples aren't altered unless they need to be. Editing a portion of an audio file only affects that portion; the rest of the file is untouched. Blocks of audio can be cut and pasted without changing their contents at all. This is especially useful for patching a finished master without corrupting its dither. Waveshop's features include peak, RMS and spectral analysis, normalizing, fading, sample rate conversion, audio generation, plug-ins, and more, all with unlimited undo and comprehensive help.

Features:

• Bit-perfect: samples aren't changed needlessly
• Very fast: all processing is done in memory
• 64-bit version can edit files exceeding 4GB
• Supports most file formats including AAC/MP4, MP3, FLAC and Ogg/Vorbis
• Clipboard: Copy/Cut/Paste/Insert/Delete
• Unlimited undo
• Normalize and/or fix DC offset
• Amplify (boost/attenuate)
• Fade in/out/custom, linear or logarithmic
• Peak statistics
• RMS statistics with histogram
• Reversal and inversion
• Find clipping with detailed report
• Extract channels to mono files
• Insert/delete/swap channels
• Change audio format
• Sample rate conversion
• Generate audio w/ envelopes and modulation
• Edit surround speaker assignments
• Find zero crossing
• Multiple Document Interface (MDI)
• Multithreaded processing
• Playback via DirectSound
• Peak-hold meters with surround support
• Real-time spectrum analyzer
• Recording with no limit but disk space
• One-touch and sound-activated recording
• EQ, compression, and other effects via LADSPA plugins