Find many great new & used options and get the best deals for Boss Sp-303 Sampler Complete In Box w/Adaptor and Manual, Warranty Card at the best online Owner's manual • Read online or download PDF • Roland SP-303 User Manual. SP-303: Dr. Sample. ○ Maximum Polyphony. 8 voices. ○ Internal Memory. Samples: 16 (8 samples x 2 banks). Patterns: 16 (8 patterns x 2 banks).The BOSS SP-303 Dr. Sample offers DJs and musicians a compact, easy-to-use portable phrase sampler with CD-quality sound, 8-note polyphony, The eight samples assigned to the eight pads are collectively referred to as a “sample bank,” and the SP-303 allows you to use four banks, A–D. Banks A and B View online or download Boss Dr. Sample SP-303 Owner's Manual. We have 2 Boss Dr. Sample SP-303 manuals available for free PDF download: Owner's Manual SP-303 - read user manual online or download in PDF format. 1Owner's Manual Thank you, and congratulations on your choice of the BOSS SP-303 Dr. Sample.