Mac mini: USB audio input not working in apps

I have a Mac mini running OS 12.7.4 (Monterey). I'm trying to convert old cassette tapes and vinyl records to MP3 files, using a Griffin iMic USB converter. I have tried EZ Audio Converter and Audacity; both these apps recognize the USB converter, but neither registers an audio input when I start the cassette player or the record-player. The same thing happens when I use my Logitech USB headset: both EZ and Audacity recognize the headset, but neither show any signs of audio when I speak into the mouthpiece.

Strangely, the Mac DOES respond to audio from the iMic or the Logitech when I select the 'Sound' icon in the 'Preferences' menu.

Posted on Jan 25, 2026 6:44 AM

Top-ranking reply

MartinR

Level 7

24,996 points

Posted on Jan 25, 2026 12:49 PM

In Audacity > Audio Setup > Recording Device you must select the recording device you want to use (the iMic).

If you are connecting the tape out from a cassette deck make sure the iMic switch is set to Line In.

How are you connecting your turntable to the iMic? If the turntable has no preamp you can try setting the iMic to Mic In but the level may still be too low to hear. Also, without a preamp the audio will not have the necessary RIAA EQ that vinyl uses.

What cassette deck & turntable are you using?

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Mac mini: USB audio input not working in apps

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