Approx. (roughly 1.0Vrms to 2.0Vrms depending on model) ADC Recording 24-bit / 96kHz for microphone input Key Performance Advantages JCALLY JM6E CX31993 DAC - Reviews - Head-Fi
Maximizing Your Mobile Audio: The CX31993 DAC "Fix" and Beyond cx31993 datasheet fix better
Rather than a traditional hardware "datasheet fix," most improvements are found through software configuration and specific usage techniques. 1. Low Volume Distortion & Hiss Approx
Here is a guide addressing both angles.