Sorry if I'm repeating a thread. I thought I'd seen a thread on something similar a few weeks ago, but I can't find it.
I'm looking for a Linux equivalent to an application called Click Effects. It's an audio board for live events. I use it for sporting events. It has the ability to have 30-40 buttons per page over several pages, each linked to a sound effect or an mp3. It will also show buttons you've already used in red so that you don't repeat effects or songs that you've already used. It also allows you to have one button (usually the space bar) that will stop the effect/song by fading it out quickly.
Again, sorry if this is a repeat, but I'm really trying to avoid having to boot into Windows. The sooner I can get this application replaced, the sooner I won't have to use Windows for anything anymore!