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Hello, Teensy Newbie here Running Teensy 4.0 with Audio Shield Rev D2 to play one wav file off a teensy and the audio quality is very poor and noisy. I've tried running it with the sample wav files and just one audio object (including example code WavFilePlayer) but the sound is still pretty...

I am also experiencing a similar issue. Using Teensy 4.0 with Audio Shield R2. My wav files (SDTEST1.wav from pjrc site) play but with extremely poor quality while running the audio example code SdWavPlayer. The hardware test code returns "SD card is not connected or unusable." I have tried...