DIY-Perks, USB microphone, line part [not yet verified]

DIY-Perks preamplifier and video audio capture card [schematic diagram is copied for reference only (crying and laughing.jpg)] two-in-one [not verified yet]
CM6317A has been discontinued, the new CM6327 replacement needs to be verified, the effect and sound quality are unknown
S The /D row pin corresponds to the S/D pin of the field effect tube, and the 3.5mm interface is reserved to retain the original function of the audio capture card.
The 2p terminal is connected to the gain resistor
3p terminal, 1 pin MIC, 2 pins left channel, 3 pins right channel, can be installed Switch or directly short-circuit according to your own needs.
A 5.1K pull-down resistor has been added to the C port.
Modify the package according to your needs.
Attachment 1: The original schematic diagram of the preamplifier.
Attachment 2: The resistance value of each gear of the gain resistor potentiometer
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