Why be so rude? No point was missed—if you overstated, fine, but don't tell me what I need to do. You said, in reply to me, that all music fits the same "statistical envleope". Clearly, this is not true unless the envelope is absurdly broad. Any "high fidelity" encoder should allow signals that aren't your expectation of a "statistical" musical envelope.
I gave an example of unexpected music, not white noise, it was merely a related comment that we shouldn't have too narrow a view of what qualifies as music. I don't need to check with MQA, it wasn't about MQA, it was about Amir's comment of suitable source material in testing. White noise and square waves should absolutely be expected in audio that would end up in a streaming service. Music or otherwise—Apple Music has plenty of sleepy-time noise tracks. The solo in Lucky Man is unfiltered square waves (Emerson just got his modular, hadn't yet learned the joys of filtering—sure, it's a chorus of square wave oscillators, plus drums, but I'm sure I could fine you plain square waves in Kraftwerk or somewhere else, white noise bursts too). I think Amir might have meant their use beyond listening tests, as I allowed in my comment to him.