I got a digital optical audio out cable, two male connectors, and connected the machines, switching over the tv to using that, but I still got no sound. Maybe I have the wrong cable.
Check the audio settings on the JVC. You may have to set it to output audio over HDMI.
I tried using a digital audio cable to connect the two machines and set the tv on digital audio out, but that didn’t,t work. I went into the VCR and couldn’t figure out how to change the audio so it didn’t,t use hdmi. I just figured it would do that when I put in the optical cable.