Re: OT: Apple has a patent on tremolo!
Re: OT: Apple has a patent on tremolo!
- Subject: Re: OT: Apple has a patent on tremolo!
- From: Paul Evenblij <email@hidden>
- Date: Thu, 1 Mar 2007 17:39:20 +0000 (GMT)
--- Richard Dobson <email@hidden>
wrote:
>
> So, what on earth are Apple up to here, trying to
> patent tremolo? Prior
> Art? Decades...
As far as I can see (after reading the complete text),
the patent application does not have anything to do
with tremolo or amplitude modulation, apart from the
side effect you get when mixing a sine wave with
another, slightly detuned sine wave.
But this is not about sine waves. In my understanding,
the patented method is a way of getting beat
frequencies which are constant along a large range of
main frequencies. I.e. if you have your two
oscillators playing C3, and the beat frequency is 3
Hz, then if you play C4, the beat frequency will be 6
Hz using 'prior art'. Using Apple's method, this beat
frequency will *always" be 3 Hz.
My two cents.
___________________________________________________________
New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes.
http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden