Or Lyle could simply include the "phase scrambler" (phase rotation)
function in the DSP. IIRC, the Kahn box simply ran the audio through
a filter that caused a frequency dependent phase rotation resulting
in audio that had symmetric positive and negative peaks and avoided
issues with microphone polarity that was voice specific (e.g., one
DJ's voice was "positive dominant" while another was "negative."
73,
... Joe, W4TV
On 10/5/2010 10:41 PM, Luis V. Romero wrote:
> Or, he could scour E-Bay for a Kahn Symetra-Peak!
>
> -lu-w4lt-
>
> Message: 37
> Date: Tue, 05 Oct 2010 17:39:37 -0700
> From: Jim Brown<j...@audiosystemsgroup.com>
> Subject: Re: [Elecraft] K3 Feature Request
> To: elecraft@mailman.qth.net
> Message-ID:<4cabc549.6000...@audiosystemsgroup.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 10/5/2010 5:11 PM, Tim Tucker wrote:
>> incorrect phase orientation
>
> The correct word to say what you mean is POLARITY, NOT PHASE. Phase is
> a continuously valued function, and has the units of degrees. Polarity
> is the word that describes whether the waveform is inverted or not.
> Changing the phase of a signal is VERY different from changing its
> polarity.
>
> What you're asking for is a very good idea. Circuits that sense which
> part of the signal is hotter and reverses it if necessary to keep the
> hottest part on top (to prevent carrier cutoff) have been around since
> at least the 50s.
>
> 73, Jim K9YC
>
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