Ocenaudio is free audio editor for Windows, Mac OS X and Linux.It is also based on Qt framework. Using ocenaudio you can edit and analyze audio files.It has a real time preview feature of your audio files. using this feature, you can hear the processed signal while adjusting the controls.
It supports multi-selection feature. With this amazing tool, you can simultaneously select different portions of an audio file and edit, listen or apply an effect.With this tool you can edit very large audio files. It also supports spectrogram view.