The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Wombat's Revenge
Date: Sun, 19 Jan 2003 21:25:56 GMT
NNTP-Posting-Date: Sun, 19 Jan 2003 13:25:56 PST
> John Larkin wrote:
> >Would some kind soul please explain to me
> >What's the difference between a frequency shifter and a pitch shifter?
> >What are they used for?
> >How do they generally work?
> >Any other fun facts.
> Pitch shifters (usually) work by A/Ding the incoming signal, storing in a dual
> port RAM then reading the data out at a different rate then D/Aing. You will
> immediately see a flaw in this in that if the data is read out faster than it
> is written in, then it will run out of data. Some tricks are used to re read
> certain sections (on a cycle by cycle basis) to fill in the gaps. The first
> units of this type did suffer some quite severe glitching at certain pitch
> changes but the new algorithms are *so* good that it is all but impossible to
> tell the difference. All the ear hears is a change in pitch with no other
> artifacts. Most recent comercial recording have made use of pitch shifters
> somewhere in the chain.
Question about the last sentence. If I go to a live performance, there
is no electronics involved so what I hear is what is played. Why should
a recording of such a performance involve pitch shifting?
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup