A couple of months ago we had a customer notice a peculiar, slight, and
seemingly unpredictable clipping sound from his new UM400 bodypack
transmitter. This person was occasionally hearing distortion that was not
totally related to input level. It happened only with certain voices using
certain microphones and even favored certain words.
For those out there who think they've heard the same thing, I've got good
news, good news, and good news.
Good news #1: You might not be crazy.
Good news #2: The peculiarity has been identified and fixed.
Good news #3: If you haven't noticed the problem yet, you likely never will.
(at least there's no rush to get it updated)
From what I could gather from Lectro Larry Fisher's explanation, the problem
had to do with an algorithm (part of the DSP's limiter emulation) that
considered the combination of average levels, peak levels, and attack times.
Evidently more consideration needed to be given to the internal processing
time and its affect on the limiter's desired attack time.
Larry, if I've botched the explanation, feel free to correct me.
Anyway, good news #4 is that no wires, switches, or other components need to
be changed. It's all done with a painless software injection. Trew Audio,
like some other shops, can reprogram the 400 transmitters with the latest
software.
Glen Trew
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