I would like to use RMAA for distortion measurement of a headphone amplifier like a buffered CMOY. But I am afraid that I would kill the soundcard input with my headphone amplifier. Can this circuit shown here PC Sound Card Oscilloscope Circuit Diagram be used to protect the soundcard input ?
Pad it down with two resistors.
So I just use the voltage divider resistors shown hereVoltage Dividers - learn.sparkfun.com ? Maybe use 10k ohm for R1 and 1k ohm for R2 ?
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