Is there a way to change the battery rock drum machine or sampler / beat-Pad? I have seen on youtube, someone used Battery for converting mixer. I want to do that. I need help to convert. http://andrewrudson.com/main.php Sampler $11.49 Reference Recordings:909 Sampler $9.23 Tall Poppies:191 Roland SP-555 Creative Sampler Workstation $818.09 Roland SP-555 Creative Sampler [...]