The VU indicator is not fast enough even to be a 'quasi-peak' indicator,
so it misses signal peaks that would overload a disc-cutter or its disc,
or a magnetic tape. Professional recorder people learn how to overcome
that, but few consumers learn, of course. The PPM was specifically
designed to prevent over-modulation of broadcast transmitters, leading
to out-of-band emissions.
On 2024-11-10 18:45, Ralph McDiarmid wrote:
Another sidebar. The VU meter (or its approximation) was also
included in some HiFi equipment. Its accuracy may have been a
question mark in many brands, similar to the S-meter in amateur radio
equipment. Its inclusion in consumer equipment was more decorative
than it was useful.
Ralph
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