Pd knobs is a high resolution 13 knob MIDI controller designed for use with Pure Data. CDM (The Create Digital Media Blog) called it "alternative modular." It is intended as a complete musical interface for playing a piece of music, usable without needing to look at a computer screen. Thirteen knobs are enough to generate considerable variation without being "too many" knobs.
Multicolored knobs paired with nice feeling single-turn potentiometers make for a visually meaningful musical interface. The colors make it easier to identify an assigned knob, and potentiometers mean the knobs point to a specific value.
Pd Knobs communicates with Pure Data over a USB cable and sends 10-bit values using MIDI NRPNs. (10-bit resolution is 8 times higher than most knobby MIDI controllers.)
Please see Sonoclast.com for more information including downloadable Pure Data abstractions.