Practical checks before audio revisions

[LucasPi]

I am preparing a classroom exercise about what changes when an audio file is exported into different formats. A generated instrumental could provide the example, provided students can always return to the original file. I would start with listening notes so that the image does not dictate their initial observations. I found mp3 to spectrogram as a possible reference while planning the visual part. We would then compare documented export settings using the same passage and a consistent playback level. The lesson needs to distinguish an observation in the image from a claim about its cause. A worksheet could separate audible observations, export settings, and questions that remain unresolved. I would assess the quality of the explanation instead of asking students to improve the audio. Students would record the software used for each export so that their comparison can be repeated later. How would you keep this lesson manageable for students learning audio formats for the first time?