I had my first tries on T3.2 and the AudioShield. Everything worked as it should. So I changed the T3.2 with a T3.6 and now only big noise gets out of the AudioShield.
I loaded the Hardware-Test-Example, and here too, only loud noise. I tried some other examples like SamplePlayer and it seems to me like the sound gets very extremely distorted somewhere in the background of the noise. So I went back to the T3.2 and now here too, only noise where it has worked before.

I ordered me a second AudioShield because I was thinking I broke the first one. But here also only noise. I plugged of/on a thousand times and now somehow the T3.2 works again. But still I only get noise with teensy 3.6.

I somehow wonder if I got a AudioShield that is not compatible with T3.6 ? On the pics here there is printed ".. for Teensy 3" .. on mine there is only printed "AudioShield Rev B" .. oO

I ordered here: https://www.amazon.de/gp/product/B01...?ie=UTF8&psc=1