The LM4934 Software provides easy read/write access to the data registers of the LM4934 audio subsystem through an I2C/SPI control interface. This manual will provide instruction on how to use this software with the LM4934 demo board and associating USB interface card. Furthermore, examples will be provided on using the software to program the headphone and loudspeaker outputs, setting the PLL, and other features of the LM4934 audio subsystem.