FileList.txt

DipTrace Files
	4xFilters.dch			Filter board schematic
	4xFilters.dip			Filter board PCB
	Pwr-PreAmp.dch			Power Supply/PreAmp board schematic
	Pwr-PreAmp.dip			Power Supply/PreAmp board PCB
	BlockDiagram.dch		Block Diagram
	NoFilter.dch			Filter board with no filter schematic

Schematic Figures
	Fig 1 BlkDiag.jpg
	Fig 2 PowerSupply.jpg
	Fig 3 PreAmp.jpg
	Fig 4 Filter.jpg
	Fig 5 NoFilter.jpg

Photos
	Photo 1.jpg				LTspice plot of filter characteristics
	Photo 2.jpg				Display of some music
	Photo 3.jpg				Assembled boards and enclosure

Filter LTspice.asc		LTspice design

AudioSpectrumDisplay BOM.ods	Bill of Materials (Libre Office file)
AudioSpectrumDisplay BOM.xls	Bill of Materials (Excel file)
Frequencies.ods			List of frequencies and components for three configurations of frequency bands (Libre Office)
Frequencies.xls			List of frequencies and components for three configurations of frequency bands (Excel)
