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. I would start with listening notes so that the image does not dictate their initial observations. I found [url=https://sunofixer.top]mp3 to spectrogram[/url] 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. My worksheet would have separate spaces for listening notes, format settings, and unresolved questions. 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. Which comparison mistakes should I explain before students begin this exercise?