The ADC (Analog-digital-converter) will always have an anti-aliasing lowpass filter to remove any frequencies above the nyquist and prevent aliasing in the reco

The ADC (Analog-digital-converter) will always have an anti-aliasing lowpass filter to remove any frequencies above the nyquist and prevent aliasing in the recording. Sometimes it's analog, nowadays it's often a 2-stage system with oversampling and a digital anti-aliasing filter. But the result that goes into the recorder is the same, any frequencies above the Nyquist (which would become aliased and mirrored) are removed or reduced to inaudible levels before being finally digitized. So while cymbals do have lots of high frequency content, in a 44.1khz recording any frequencies at or above 22.05khz should be removed first. (In reality it's not a brickwall filter at that frequency, but tends to steeply roll off once it gets nearer). Unless I'm misunderstanding what you're asking.