2 channel in 4 channel out DSP pre-amplifier module ADAU1701

2 channel in 4 channel out DSP pre-amplifier module base on ADAU1701 Sigma DSP The ADAU1701 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing includes equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening. This processing can be used to compensate for real-world limitations of speakers, amplifiers, and listening environments, providing dramatic improvements in perceived audio quality. < 25uV Output Noise (AES17,A-weighted) >3Vrms @ 1% THD+N (un-Balance Output) 102dBA dynamic range Support both Analog input and digital I2S input/output Very Compact size(80mm*30mm*20mm, L*W*H) Bluetooth plug-in option for wireless audio streaming On board USB connector for online design with sigma-studio On board Potentiometer for basic audio tuning(Bass,Treble,Volume,etc)