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작성: goldie, 날짜: 8월 18, 2014 ·

googled "how to learn recorder", 7th hit was www.tarleton.edu/~boucher/RecorderLesson.PPT, this add-on opened sadly some gibberish :(

작성: Adon (개발자), 날짜: 10월 16, 2014 ·

I clicked and got redirected to below:
https://docs.google.com/viewer?url=www.tarleton.edu%2F~boucher%2FRecorderLesson.PPT

It looks alright to me. Was it due to other issues like unstable networks?