You can use the Real Tracks Picker--it might get you a better selection.

I set the tempo to 80, then searched 'Guitar Mute'.

In the results list, right click on a Real Track and select 'Load styles that use selected Real Track' from the pop-up menu.

You'll get a box with a list of styles. Click on a style, and then you can click the Play button to hear the demo song or the Solo button to hear the guitar by itself. You can preview styles to find one that could work for you.

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