Trim your MP3s and apply fade in out effects, with MP3 Cutter Editor
MP3 Cutter Editor is a free program that will help you cut / trim an mp3 file, and apply fade in or out effects.
You can click on a graph to set the current position for playback, then click a toolbar button or set this position as start or end of a selection.
You can also click and drag on the graph to define the selection area directly.
Editing Commands supported by Free MP3 Cutter and Editor: Delete Selected * Delete Unselected * Change Volume * Maximize Volume * Fade In * Fade Out * Convert to Stereo * Convert to Mono