 Let's talk about SIRLE Audio Interface. The SIRLE Audio Interface is integrated in STM32 products to provide an interface for communicating with external audio devices such as amplifiers, A2D and digital to audio converters, audio codecs and audio processors. This interface is fully configurable, supporting the most audio standards, allowing easy connection to any existing audio devices. Due to the internal synchronization features of the SIRLE Audio Interface, the required IOPIN count is reduced to minimum. The depicted use case shows connection of the audio stereo digital to audio converter featuring a 44.1 kHz 16-bit stereo mode of audio transfer. The codec is connected through the SIRLE Audio Interface through the Audio data channel and through the I2C bus used as a control interface and configuration for the stereo DAC.