Echo Mia 24Bit 96K PCI Audio Interface 2 balanced 1/4" analog inputs with 106dB (A-weighted) dynamic range 2 balanced 1/4" analog outputs with 106dB (A-weighted) dynamic range MIDI in/out 24 bit coaxial S/PDIF digital I/O Supports full duplex 4 channel in, 4 channel out operation.