The LM4970 is a LED driver with an audio synchronizationmode that virtually eliminates the need for real time softwareprocessing for LED lighting effects. The LM4970 includesthree individual PWM color LED drivers that provide up to 42-mA of current drive for each PWM LED output.The LM4970 features an audio synchronization mode wherethe audio input signal that is mixed in from three audio inputsis filtered into three frequency bands, with each frequencyband assigned to a specific PWM LED driver.