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"Why is the output of the op-amps inverted?"
The op-amp is used as a summing amplifier. It adds together a constant negative voltage and the DAC signal which has a constant positive voltage offset, thereby nulling out the offset. It is an inverter, so that this can be done with only one stage of op-amp.
This is easily corrected by inverting the wave data before you play it back.
James.
The op-amp is used as a summing amplifier. It adds together a constant negative voltage and the DAC signal which has a constant positive voltage offset, thereby nulling out the offset. It is an inverter, so that this can be done with only one stage of op-amp.
This is easily corrected by inverting the wave data before you play it back.
James.