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Old 12th Feb 2019, 9:07 pm   #1
Scott37
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Default Audio phase correction

I encountered in an old thread the term 'audio phase correction' in relation to AM radio. Could someone tell me (in not too technical terms) what this is about? Thanks
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Old 12th Feb 2019, 9:24 pm   #2
Karen O
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Default Re: Audio phase correction

Hi Scott,
Not sure if what I'm thinking is relevant but I've heard that, prior to transmission, the audio is often subjected to all pass (i.e. phase only) filtering. The aim is to smear the frequency components of transients so that they attain a lower peak while sounding the same. It's corruption really, but it enables a higher apparent modulation.
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Old 13th Feb 2019, 9:30 am   #3
Scott37
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Default Re: Audio phase correction

Thanks, but what I was thinking of is where several transmitters share the same frequency, as a way of reducing problems in so-called mush areas.
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Old 13th Feb 2019, 10:10 am   #4
Andrew2
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Default Re: Audio phase correction

There have been several threads concerning the effects of transmitters radiating the same content on the same frequency. Try a search for 'mush zone', synchronised transmitters etc. I'm sure something will pop up.
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Old 13th Feb 2019, 12:26 pm   #5
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Default Re: Audio phase correction

Scott - try this page:

https://www.bbc.co.uk/rd/search?Type...ns&Decade=1970
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