30kHz you say? So you shouldn't ever need anything better for your audio work!
Well, my younger self used it quite a lot for audio.
The best use was for my Electronics 1 test at the university.
Sorry for the OT...
I was sure I had made a perfect test, and once home I had actually built the circuit in the test assignment.
When I went to check the date of the oral test and the written test results I was shocked: 10 out 30.
I then took pictures of the scope and the circuit (a simple CC generator charging a capacitor!) with my
smartphone film camera, had them developed and brought them at the oral test.
It was quite a struggle (the professor would not admit in public he was dead wrong), but the evidence was out of question.
My fault? I had added also the calculations and extended the graph to include the behaviour when the transistor in the CC source saturated (i.e. no longer CC).
In the end he gave up and stated many of the tests had to be re-evaluated.
My final result? 25/30...He said "OK, you know electronics, so let's start with Schrödinger's equations"