Hi, rharv. Thank you for your response.

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If one computer generates it without the noise, use that computer to generate the track.
Maybe the computer issue, do you think?
I could install BB2025 in my old laptop to see if it makes the hiss noise........

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The answer to all 3 questions is *generally* yes, but all of those come with much more risk
Right. I should be careful.

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Simon said it's the 2018 version instigating the noise
What do you mean? The ballad style in BB2018 doesn't make the hiss noise, but the same style of BB2025 does.

My old laptop will eventually die, and I want to work on just one laptop for everything.

Regards,
Jazzutako