• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
how do different frequencies playing at the same time get represented?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

how do different frequencies playing at the same time get represented?


  • Subject: how do different frequencies playing at the same time get represented?
  • From: Ben Dougall <email@hidden>
  • Date: Fri, 14 Jan 2005 15:11:35 +0000

hello,

what i want to know about sound on a computer is, how do two continuous tones occurring at the same time get represented? it seems similar to wanting to, with images, wanting to represent say red and yellow in the same pixel (which would actually just end up as orange. not red, and yellow, at the same time.) in fact colour is split up into several elementary colours (like red green blue) and they are treated with different values which are called channels, and a pixel can be made up of a mixture of the channels, but as i say, those various colours end up as one colour. and that isn't the way sound channels are anyway, as each channel is a stream of audio (like one of the two streams of stereo) -- all and multiple tones can be represented in one audio channel, so channels in audio are irrelevant to what i'm asking about i think. how does a mono, single channel stream of sound manage to represent two tones occurring at the same time without merging the two tones into one?

just to go on and try and illustrate exactly what i'm asking:
situation 1:
two different tones/frequencies playing at the same time. one who's tone is, say, 10. the other who's tone value is 20.
situation 2:
a single tone playing who's tone is 15


how is the difference between those two situations achieved/represented in digitised audio? how do the tones 10 and 20 playing at the same time not end up as the same as a single 15 tone?

any pointers to relevant info appreciated.

thanks, ben.

_______________________________________________
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


  • Follow-Ups:
    • Re: how do different frequencies playing at the same time get represented?
      • From: Bob Lang <email@hidden>
  • Prev by Date: Re: Initialize() and Cleanup() vs GUI
  • Next by Date: Re: how do different frequencies playing at the same time get represented?
  • Previous by thread: Re: Initialize() and Cleanup() vs GUI
  • Next by thread: Re: how do different frequencies playing at the same time get represented?
  • Index(es):
    • Date
    • Thread