Rakarrack Guitar Effects

This is actually pretty simple using jack. You will want to use a jack routing program like qjackctl or patchage. From there you patch Rakarrack to System Outputs, and also patch media player (audacious has a jack output plugin) to the same output. IIRC Totem automatically connects itself to system outputs so you don't have to manually route it, so try this: Open an mp3 in Totem (with jack active). Open Rakarrack. Play to the music. Use the volume controls on the media player and/or on Rakarrack to help adjust levels. There are also mixer programs for jack to do this sort of thing. Search your package manager for jack mixers and see what you come up with. Anyway, I don't have much for a step-by-step for you at the moment, but I hope this is encouragement that you can easily do what you're asking. cheers,