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Success!! Thank you to Gutisie for all your suggestions! It seems the audio converter I was using must not have been getting things into the right format. I tried a different online .wav converter and BOOM... It worked just fine. I really appreciate the advice though. This is one of those head-smacking "doh" moments
Good thought! I have been holding down the button, however, to let the sound play completely
Hello Friend! Thanks so much for your replies. After a few months of my life being too busy for side projects I'm finally back to it, and I appreciate the help! I don't think my files were playing out of my computer much/any quieter than the sample files were. I will, however, definitely give boosing them a shot.
Playing Wave file using arduino