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SD Card file to speaker issues

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Hello everyone!

I'm having some issues playing a WAV file on a speaker.

I tried following the instructions on this website but there are some problems.

Problem 1:

When I try playing files with letters, it doesn't work. Only files with numbers work.

Problem 2:

Sometimes when I put a Serial.print() right before or close to my tmrpcm.play() function, no sound comes out of the speaker. However it seems to be completly random if the speaker plays depending on where the Serial.print() function is.

I really don't get it.

I'd appreciate any advice you could give me regarding my two problems.

Thanks a lot!

WB

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