wavy tracks

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Willy14
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Joined: Mon May 04, 2009 7:44 pm
Location: Los Angeles CA

wavy tracks

Post by Willy14 »

I recorded a 15 minute track and the graph of the track is wavy and uneven. What is the cause. I am using a MacBook Pro with OS Sierra and Amadeus 2.4. It seems to play OK but doesn't look right.
Willy 14

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Martin Hairer
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wavy tracks

Post by Martin Hairer »

Dear Willy,
I recorded a 15 minute track and the graph of the track is wavy and uneven. What is the cause.
Sounds like your recording equipment creates a DC offset, see

https://en.wikipedia.org/wiki/DC_bias

You can get rid of this using the "Suppress DC Offset" function in Effects -> Denoising.
Regards,

Martin

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HairerSoft
http://www.hairersoft.com/

Willy14
Posts: 6
Joined: Mon May 04, 2009 7:44 pm
Location: Los Angeles CA

Post by Willy14 »

Did not work. Was it because I had already saved the file?
Could the DC offset be caused by a faulty turntable wire? I get about a 1 decibel difference in the turntable signal, and I believe it is a problem with the wire. 99% of the time I do not have a wavy waveform. I adjust for the difference in volume between the two channels when recording. [/img]
Willy 14

Willy14
Posts: 6
Joined: Mon May 04, 2009 7:44 pm
Location: Los Angeles CA

Wavy track waveforms

Post by Willy14 »

Could the cause be a faulty turntable RCA plug wire? I have to adjust the volume when recording to compensate for one track being a bout one decibel less than the other.
Willy 14

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Martin Hairer
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wavy tracks

Post by Martin Hairer »

Did not work.
Could you send me a link to a sample file showing that "wavy"
look so I can check it out?
Could the DC offset be caused by a faulty turntable wire?
Yes, that's definitely possible. Regards,

Martin

--
HairerSoft
http://www.hairersoft.com/

Willy14
Posts: 6
Joined: Mon May 04, 2009 7:44 pm
Location: Los Angeles CA

Post by Willy14 »

Can I email a screenshot to you? Not sure how to post a link. I appreciate your attention to this. I need your email address.
Best and many thanks!
William
Willy 14

Willy14
Posts: 6
Joined: Mon May 04, 2009 7:44 pm
Location: Los Angeles CA

Post by Willy14 »

A new issue that may be related to this.

Now when I open a file recorded on my old Mac PowerBook I get the same wavy waveform and the file appears to have been amplified as the waveform appears enlarged to the point of being clipped. This is very disturbing as all my previous recordings are coming out this way. Will email a screenshot.
Willy 14

Willy14
Posts: 6
Joined: Mon May 04, 2009 7:44 pm
Location: Los Angeles CA

Post by Willy14 »

Found the solution to the vertical height of the waveform in a previous thread, but still don't understand waveforms that appear to be sinuous like a snake.
Willy 14

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