Here is the GCHD source code for my FPGA-based organ tuner and the tuning spreadsheet. For a full description, see my 'blog An FPGA-Based Organ Tuner.
OrganTuner.pdf: printable GCHD source code.
OrganTuning.pdf: printable tuning spreadsheet.
OrganTuner.xoe: editable GCHD source code (requires XXICC to be installed).
OrganTuning.ods: editable tuning spreadsheet (created using LibreOffice Calc).
