Not sure exactly what you're trying to see. An ADC sampling an audio signal is taking only tiny amounts of energy from the signal to make its measurement, so if you look at the signal going into the ADC (or the buffer for the ADC, depending), it should look just like the signal anywhere else, regardless of sample rate.
You can probably look at the ADC's sample clock or data output and figure out what sample rate it was running, but the whole point of the ADC's input stages is to keep from altering the signal while making its measurements.
If you're looking at a DAC output, a combination of filtering, interpolation, or other methods can be used to smooth out the output waveform. An oscilloscope generally has less vertical resolution than an audio DAC, so you wouldn't be able to see the steps in the output even if they weren't filtered, but every visible step on an oscilloscope is audible distortion in the signal, so there was been at least some filtering done to the DAC output to keep it from being distorted. Again, you could probably look at the data input rate or DAC clock to figure out what the sample clock was at and look at it along with the signal to try and correlate where the output would be changing, but with a (likely) 8 bit scope and a 16 bit or more audio ADC, your scope probably doesn't even have the resolution to see the DAC's minimum output step size.
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