SparkFun Sound Detector SF_Infrared this OutSmarts is an unbalanced-to-balanced

this OutSmarts is an unbalanced-to-balanced output driver

If you need a module with more isolated digital inputs per VINT port

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It should be noted that the max input of the FT231X is only 3

SparkFun Sound Detector SF_Infrared this OutSmarts is an unbalanced-to-balancedThe SparkFun Sound Detector is a small and very easy to use audio sensing board with three different outputs. The Sound Detector not only provides an audio output, but also a binary indication of the presence of sound, and an analog representation of its amplitude. The 3 outputs are simultaneous and independent, so you can use as many or as few as you want at once. The envelope output allows you to easily read amplitude of sound by simply measuring