I am trying to go through the video tutorial but I have become stuck.
I get the following message,
"'waveform1' was not declared in this scope"

I am using a teensy 3.2 and audio shield rev B.
I tried to follow each step of the tutorial, rewinding etc to ensure I hadn't missed anything, but I just don't know what to do next.

Anyone able to suggest how I can get past this?

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