[DCP-o-matic] Trimming/Audio

Someone told me about his problem with trimming off the end of files. He usually does that based on the visuals (as in 'in fabulous 3D'). However, he can't hear the audio in DCP-o-matic, and his trims very often cuts of audio. Could there be a way to solve this in DCP-o-matic? Is it very difficult to add audio monitoring to the preview function? Or splitting audio/video that has been imported interleaved? - Carsten