Audio Equipment: What would a USB male to 3.5mm male adapter cable

High Quality USB Female to 3.5mm Jack Male Audio Converter Adapter

3 Pin To Usb3.5mm Male To Usb Female Adapter For Mp3/mp4 & Mobile

SatelliteSale Universal USB Type C Audio and Power Adapter Male to Fem

5Pin Micro Usb Male 3.5mm Female Audio Cable Adapter 5P Mini Usb

Headphone Splitter for Computer 3.5mm Female to 2 Dual 3.5mm Male Headphone Mic Audio Y Splitter Cable Smartphone Headset to PC Adapter

Why run all new cables for RS-232 control of your audio/video system, when you can use this easy adapter? The Velocity RS-232 adapter leverages your DB9 or 3.5mm stereo audio cable to run 3-conductor RS-232 control signals between your control unit and your video display. Fully molded DB9 and 3.5mm connectors provide excellent strain relief. This adapter is ideal for use with computers, projectors, and any control unit/display requiring 3-conductor RS-232 serial control.