Yes, it's long been well known that real audio waveforms are
asymmetrical. WAY back in the '50s, AM broadcasters used a device that
constantly monitored the waveform and constantly flipped the polarity to
keep the hottest peak so that it increased instantaneous TX power.
That's because with
From my AM broadcast days and my pro audio days, yes it is not unusual
to find that a given mike has more positive output than negative output
in terms of the voltage waveform. Thus if phased correctly, and we are
only using one mike, the positive modulation peaks will be greater than
the
Perfect, I was just not using the right terms in my search. This explains
it very well, and even includes some discussion of how this can cause
amplification to start clipping on one side of the waveform before the
other.
Thank you!
Nick
On 14 September 2018 at 13:38, Walter Underwood
I searched for “asymmetrical speech waveforms” and found this.
"The other element involved in this is that many acoustic sources inherently
have a 'positive air pressure bias' because of the way the sound is generated.
To talk or sing, we have to breathe out, and to play a trumpet, we have to
An audio engineering friend noticed in some voiceover recordings something
that I've also noticed in my own waveforms, that a lot of the time, human
vocal cords seem to produce a biased waveform (seemingly a positive bias
most of the time).
I vaguely remember reading either here on this list, or
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