Timbre is a DSP project aiming to create a custom-built guitar effects pedal.
You'll need a TMDX5535eZdsp development board: http://www.ti.com/tool/TMDX5535EZDSP You'll need code composer studio (A license comes with the board) You'll also need the EZDSP support libraries: http://support.spectrumdigital.com/boards/ezdsp5535/revc/