Connect your analog audio devices with a 3.5 mm to USB converter. USB to 3.5 mm jack.
USB DAC Converter on Amazon: https://amzn.to/3z6sP3Z
3.5 mm jack to RCA: https://amzn.to/2SmzMwQ
3.5 mm cable splitter: https://amzn.to/3xQA9Pg
USB-A to USB-C adaptor: https://amzn.to/3gPAITZ
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