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Old 12-01-2017, 05:30 AM   #67
RobertDDL
Whatever...
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Join Date: Feb 2015
Location: Austria
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Quote:
Originally Posted by arjaybe View Post
Thank you for the tip on mono. Decreasing the size will be a good benefit. I don't save the original recordings, but I have the WAV files, edited and normalized. Should be easy to try a mono conversion.

Thank you for the tip on the high-pass filter for the low frequency noise. I wonder how low my voice goes. I wouldn't want to cut off any of those good vibrations.-)

So far I haven't edited using headphones, but if you're finding unacceptable noises that I'm missing, maybe it's time to start. Dang, I was hoping to avoid that level of anality.
I have no experience with .ogg, so I don't know about the effects of what parameters there are, but I've tried out mono/stereo, and it does make a difference.

Don't worry about the good vibrations, they will not be affected by cutting off anything below 50 Hz! I don't know if you use Audacity? If so, look at "Analyze / Plot Spectrum" to see what I mean. I've often seen this sub-sonic stuff, also in my own recordings, and still haven't found out exactly where it comes from - if it's there, I remove it, but it's probably more visually annoying than an actual problem. What is a problem is that Audacity, when you apply a high-pass filter, sometimes increases peak levels - I don't understand the mathematics behind it, but it can cause clipping, and that's a disaster. Slightly changing cut-off frequency and/or rolloff sometimes makes a difference, but you may need to reduce over-all volume by several dB before applying the filter, and normalize volume afterwards.

Those noises - yes, you only hear them with earphones, but you can easily see them. But, my (limited) experience is with editing recordings of poems, and of course there's a difference in what you can reasonably do when it's a recording of one or two minutes, or several hours.

If you want to, we can continue to discuss this by mail!
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