[78-L] Waveforms - Waveschmorms?

[Malcolm Rockwell]

Thanks, Wes. Good hearing from you!
Mal

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On 1/19/2013 7:06 AM, Wes wrote:
> Malcolm,
> The waveform shape will depend on the recorded material - something like a
> flute will generally give you a fairly symmetrical waveform, but reed and
> brass are more asymmetric.
>
> As long as your stereo waveforms are continuously either in-phase or
> antiphase throughout your cleanup files, that's perfectly OK. If not, there
> was a recording fault. You don't need differently wired cartridges for
> vertical and lateral recordings for transcription/cleanup if your software
> lets you invert one of the stereo channels. As long as your final stereo
> file has channels in-phase before converting to mono, you'll be on the right
> path, and get that extra little bit of noise reduction.
>
> Now please let me go back to lurking :) .. wes williams
>
> From: Malcolm Rockwell <malcolm at 78data.com>
> Subject: Re: [78-L] Waveforms - Waveschmorms? [was Waveforms]
> To: 78-L Mail List <78-l at klickitat.78online.com>
>
> I too have sometimes noticed this odd waveform configuration when doing
> cleanups of 78s. It's kind of rare; most samples are fairly symmetrical.
> Another thing that interests me is why some transfers in stereo, of mono
> material, show the 2 waveforms in lock-step while others are 180 degrees
> out of phase. Or could it just be one of my regular cartridges is wired
> that way? I only have one of those and make a point not to use it unless
> I'm transferring Pathe or Edison discs.
> More investigation is needed on my part, I think.
> Malcolm
>
> _