Mailing ListMailing List   FAQFAQ   SearchSearch   MemberlistMemberlist   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

wavy tracks

 
Post new topic   Reply to topic    www.hairersoft.com Forum Index -> Discussion
View previous topic :: View next topic  
Author Message
Willy14



Joined: 04 May 2009
Posts: 6
Location: Los Angeles CA

PostPosted: Tue Aug 08, 2017 12:03 am    Post subject: wavy tracks Reply with quote

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
Back to top
View user's profile Send private message AIM Address MSN Messenger
Martin Hairer
Site Admin


Joined: 08 Nov 2006
Posts: 1613

PostPosted: Tue Aug 08, 2017 11:07 am    Post subject: wavy tracks Reply with quote

Dear Willy,

Quote:
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

--
HairerSoft
http://www.hairersoft.com/
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Willy14



Joined: 04 May 2009
Posts: 6
Location: Los Angeles CA

PostPosted: Wed Aug 09, 2017 4:17 am    Post subject: Reply with quote

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
Back to top
View user's profile Send private message AIM Address MSN Messenger
Willy14



Joined: 04 May 2009
Posts: 6
Location: Los Angeles CA

PostPosted: Wed Aug 09, 2017 4:23 am    Post subject: Wavy track waveforms Reply with quote

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
Back to top
View user's profile Send private message AIM Address MSN Messenger
Martin Hairer
Site Admin


Joined: 08 Nov 2006
Posts: 1613

PostPosted: Wed Aug 09, 2017 9:08 am    Post subject: wavy tracks Reply with quote

Quote:
Did not work.

Could you send me a link to a sample file showing that "wavy"
look so I can check it out?

Quote:
Could the DC offset be caused by a faulty turntable wire?

Yes, that's definitely possible. Regards,

Martin

--
HairerSoft
http://www.hairersoft.com/
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Willy14



Joined: 04 May 2009
Posts: 6
Location: Los Angeles CA

PostPosted: Wed Aug 09, 2017 1:29 pm    Post subject: Reply with quote

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
Back to top
View user's profile Send private message AIM Address MSN Messenger
Willy14



Joined: 04 May 2009
Posts: 6
Location: Los Angeles CA

PostPosted: Wed Aug 16, 2017 11:29 pm    Post subject: Reply with quote

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
Back to top
View user's profile Send private message AIM Address MSN Messenger
Willy14



Joined: 04 May 2009
Posts: 6
Location: Los Angeles CA

PostPosted: Wed Aug 16, 2017 11:35 pm    Post subject: Reply with quote

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
Back to top
View user's profile Send private message AIM Address MSN Messenger
Display posts from previous:   
Post new topic   Reply to topic    www.hairersoft.com Forum Index -> Discussion All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group