Audacity in not receiving audio from mac but mac shows audio level in settings

I need some help. Using Audacity on Mac with OS 15.1 Sequoia and MacBook Pro with M1. Just downloaded Audacity 3.7.0 but have used it previously on windows. Have a reel to reel tape player output connected to capture device connected directly to computer USB C jack.
Can find the capture device in Mac settings and in Audacity audio set up. Can see the audio level in Mac setting when audio is on but no sound going to Audacity. Have given Audacity permission for microphone (though not using one) in security and privacy. Have verified that Audacity was opened in Applications not dmg.
Any thoughts would be much appreciated.
THANK YOU!!!