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Knowledge Base > Discontinued Products > ADA8824 (ADAT) 24-bit Eight Channel A/D-D/A Converter

Where do I set the analog I/O levels of the ADA8824 (ADAT) 24-bit Eight Channel A/D-D/A Converter to match my setup?

This can be accomplished using the provided 8824 Configuration application via MIDI System Exclusive messages.

The analog I/O level sliders of the 8824Config app provide gain control in 1dB increments from -96dB to +31dB for each of the 8 analog inputs or outputs. With the input gain set to -8dB, a +4dBu input translates to approximately 20dbFS (i.e. 20dB digital headroom). With the input gain set to +4dB, a -10dBV input translates to approximately -20dbFS (again, 20dB of digital headroom). Similarly, with the output gain set to +1dB, a -20dBFS input translates to approximately +4dBu into 600 ohms. With the output gain set to -11dB, a -20dBFS input translates to approximately -10dBV. In both of these cases, the actual headroom before clipping depends on the inputs of the mixer, power amplifier, etc, that the 8824 is driving.

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