SDRdrum is a software-defined radio (SDR) implementation of the Radio Drum: a 3D gestural capacitive sensor developed at Bell Labs in the 1980s. Originally created by Bob Boie, one of the pioneers of capacitive sensing, it was intended to be a 3D computer mouse. Instead, the Radio Drum has found notability as an instrument for computer music due to the work of Max Mathews and Andrew Schloss.
While the early Radio Drum implementations used analog signal processing techniques and 1980s digital electronics, the SDRdrum's signal processing is completely digital.
The SDRdrum's firmware, FPGA logic, and host software (contained within the
firmware, fpga, and host directories respectively) are free software, and
may be modified and redistributed under the terms of the GNU General Public License
(GPL) version 3 or later.
The hardware designs contained in the boards directory are licensed under the
CERN Open Hardware License v1.2.