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From: email@example.com (Gibbo)
Date: 15 Jan 2003 21:02:28 GMT
Organization: AOL, http://www.aol.co.uk
Subject: Re: Acoustic Feedback reduction
"Phil Allison" wrote:
>"Gibbo" wrote in message
>> "Kevin Aylward" wrote:
>> >Gibbo wrote:
>> >> Ok Phil
>> >> I borrowed a 5Hz frequency shifter form a sound reinforcement company.
>> >> We played the following notes concurrently on a synth.......
>> >> E - 2, B - 2 and E +1. For the unititated these are the low E on a
>> >> standard guitar, B a fifth up from this, then another E, 2 octaves
>> >> higher. We recorded it and have posted it here....
>> >> http://www.members.aol.com/chrisgibbogibson
>> >> The file is called 5HzShift.wav The first 3 seconds are the 3 notes
>> >> played direct. The last 3 seconds are the same notes played through
>> >> the 5Hz shifter (we simply switched it on while holding the keys
>> >> down).
>> >> We also did the same thing an octave lower (still nowhere near the
>> >> bottom of the music range) and the results were, as expected, even
>> >> worse. However typical PC speakers won't even reproduce it so it
>> >> seemed pointless posting it.
>> >Well, my crappy PC speakers certainly showed the difference.
>> >The reality is that you need to shift by a fixed ratio, not a fixed
>> >frequency,as in speeding/slowing a tape recorder.
>> You try to convince Mr Wombat of that.
> ** Pitch shifting is not effective against acoustid feedback induced by
>> I suppose it is possible that he genuinely can't hear it in which case no
>> amount of arguing will ever convince him.
> ** I suppose the Gibbon genuinely cannot reason properly.
> Two people have posted backing up my story - is he blind as well as
> .................. Phil
Come on then Mr Wombat. You post some music somewhere played direct and then
through a frequency shifter. I'll tell you which is which. Which, of course, is
impossible if you are correct. I have posted a chord direct and 5Hz shifted.
Direct sounds as it is, direct. 5Hz shifted sounds as it is, out of tune,
discordant, messy and generally horrible. Are you deaf as well as rude ?
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