What are multiples, 4-input control voltage mixers, and attenuators? (An easy point of reference is the Moog CP-251, it has all those: http://moogmusic.com/detail.php?main_product_id=12) Is an attenuator just a pot? (1 Meg linear taper?) Is a mult just 4 jacks wired together, or do you need buffers/etc.? Is a 4 input mixer just a mult with attenuators? -- john