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Author Topic: Optimizing the audio  (Read 11904 times)

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FTL_Ian

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Re: Optimizing the audio
« Reply #15 on: April 16, 2009, 11:33:41 PM »

The extra DB is because I'm lining out from the Compellor into my Alesis Multimix.  This allows me to pass the processed audio out at higher levels to the streaming PC than if I just went straight to the PC from the Compellor.
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KDus

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Re: Optimizing the audio
« Reply #16 on: April 17, 2009, 12:18:56 PM »


Input levels are fine.  Tonight one side of the Compellor was set to compress and the other to level.  I figure compress the peaks then level the compressed audio, you're saying this is counterproductive?

The beautiful thing about a Compellor is that the leveling and compression circuits work together in each channel.(up to about 20dB) You lose that feature by separating the functions. However, you accomplish the goal by: 1 leveling slow, no limiting 2: compress fast w/limiting. Level first, so you can have a more consistant amount of compression.
That would allow you to get lots of leveling and lots of compression. 20dB leveling, 20 dB compression.+limiting. That would sound like a chainsaw.
Last night sounded fine.
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KDus

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Re: Optimizing the audio
« Reply #17 on: April 17, 2009, 12:24:31 PM »

The extra DB is because I'm lining out from the Compellor into my Alesis Multimix.  This allows me to pass the processed audio out at higher levels to the streaming PC than if I just went straight to the PC from the Compellor.
You should be able to get +28dB peaks out of a Compellor. PCs won't want more than +4 dB average, so, something's wrong.
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KDus

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Re: Optimizing the audio
« Reply #18 on: June 10, 2009, 08:09:30 PM »

I rarely see my AGC move, anymore. Whatever you're doing, is working well.
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okmike87

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Re: Optimizing the audio
« Reply #19 on: June 15, 2009, 05:02:26 PM »

My brain just exploded.

Now I KNOW I have no idea what I am doing.
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KDus

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Re: Optimizing the audio
« Reply #20 on: June 16, 2009, 01:08:02 PM »

I've put some basic stuff on libertyactivism.info ; under pirate radio. It isn't complicated once you know what the goal is.
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okmike87

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Re: Optimizing the audio
« Reply #21 on: June 16, 2009, 01:35:22 PM »

I don't know if you realize how much of an idiot you are dealing with. And I am the smart one on our podcast!
Thanks for the link, I'll check that out!
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marknh

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Re: Optimizing the audio
« Reply #22 on: July 08, 2009, 01:49:04 AM »

what you need to use is a multi-band processor ie orban, omia-fm for example.
when doing dab it's very important to maintain precise levels at no higher than 0 DB.(-1 or -2 is best)
a properly set limiter will have a very fast attack time and a fast yet smooth release. (no compressor breathing)

the orban 8900 is excellent but cost prohibited for many small dab's
so a nice little secrete MBL4 software on a windows based pc with high quality audio cards.
this system is allso perfect for lpfm.

here is the link, get mbl4 down the bottom.
http://www.burnill.co.uk/downloads.html

if you have little knowledge of multi-band processors then use one of the pre-set patches included with the software.
since you have 15 or more adjustments to make and with out a tuned ear or the required calibration equipment you will rip your hair out.
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