Gear / Technical Help > Post-Processing, Computer / Streaming / Internet Devices & Related Activity
Is there a trick to balancing channel volume?
kuba e:
I am sending an apology to JonG too.
--- Quote ---linear-phase "constant group delay" filter.
--- End quote ---
I've noticed similar things recently. I spoke with Moke about his recording of the Poway Symphony Orchestra. He made a records with cards and omni. When he mixed cards and omni together, it did not sound good. We tried to mix only LPF part of omni and HPF part of cards.
The result mix must have flat frequency transition between LPF and HPF when mixing together. First idea was : 1.Omni - make LPF 2.Cards - get HPF by subtracting LPF (HPF cards=cards - LPF cards). 3. mix it together. On this occasion I noticed that LPF and HPF cause a phase shift for individual frequencies (I'm not sure if this is a linear phase shift, I have to look more on theory). So it is not possible to get HPF by subtracting LPF from original signal. The conclusion was that we can use only "true" LPF and HPF with the same cutoff frequency and 6db slope. Filters with these settings creates a flat frequency transition and the phase shift is the same for both parts of LPF and HPF.
But if there is filter that can regenerate the LPF and HPF phase shift, then we could use the first idea with subtraction (HPF cards=cards - LPF cards) and we would not be limited by 6db slope of HPF and LPF.
Here is the original post:
http://taperssection.com/index.php?action=post;msg=2222325;topic=181444.0
--- Quote ---https://www.allaboutcircuits.com/technical-articles/understanding-linear-phase-filters/
Here's a Voxengo plugin which can do that kind of phase manipulation- http://www.voxengo.com/product/pha979/
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Thank you for links.
JonG:
No problem, guys! All the details are beyond me at the moment, but it definitely adds to the wealth of information that TS has, and I'm sure others will appreciate them.
After some more experience with a more recent show I'm working on, I want to thank you guys for turning me on to WaveLab. It's way more user-friendly (and thus powerful) for someone like me than Sound Forge, and I'm having way more success with it! I'll post some comparisons after everything's done with what I'm working on.
If anyone comes across this thread and is looking for tips on editing programs, WaveLab Elements gets a hearty recommendation from me. :guitarist:
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