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I am preparing a classroom exercise about what changes when an audio file is exported into different formats. The source would be a short generated instrumental, with the original retained throughout the exercise. Students would first describe what they hear before looking at any visual representation. I found mp3 to spectrogram as a possible reference while planning the visual part. For the comparison, I would keep the chosen passage fixed and check playback levels carefully. I want to avoid teaching that every visible difference identifies a defect in the generated source. I am considering a worksheet that records what was heard, how it was exported, and remaining uncertainties. There would be no requirement to repair the clip or produce a supposedly perfect version. Students would record the software used for each export so that their comparison can be repeated later. What simple controls would make this exercise understandable for a beginner class?
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