Why 'more or less stopped using ISO'?

Started 6 months ago | Questions thread
Iliah Borg
Forum ProPosts: 15,930
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Re: Maybe this will help.
In reply to jackdan, 6 months ago

Well "Photometry is the science of the measurement of light in terms of it's perceived brightness to the human eye" and those measurements have units. The relationship between the measured quantity and brightness is what it is and the definition for photometry probably expresses it best.

A huge disagreement exists about weighting functions.

But the bigger thing is that it is not about the raw numbers. If the microphone is more sensitive, or a mic amplifier has higher gain, are the numbers on the tape louder?

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