Servo-Related Baseline Shifts Seen In Soundfiles

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mediatechnology
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Servo-Related Baseline Shifts Seen In Soundfiles

Post by mediatechnology »

Occasionally while editing soundfiles I find odd servo-related near DC-responses.

This one is from the intro of Fiction Plane's "Two Sisters" recently downloaded from Amazon:

Image

It looks to have a linear recovery. I can't see what, if anything, happened prior to the intro. There may have been a song segued before it, but what is it recovering from? Granted it is heavily zoomed but what happened before t0?
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JR.
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Re: Servo-Related Baseline Shifts Seen In Soundfiles

Post by JR. »

That leading burst doesn't look like a simple acoustically generated waveform, either a gated source, or perhaps a synth. In fact the start at a zero crossing looks like synth, while I have designed a burst gate for bench work that senses zero crossings most audio gates don't.

DC happens.

JR
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mediatechnology
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Re: Servo-Related Baseline Shifts Seen In Soundfiles

Post by mediatechnology »

It's actually strummed solo electric guitar.

I've never seen an intro with an ongoing recovery like this one. You will sometimes see a LF slope on a fade in or fade out, but this one is the wrong direction.
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