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Re: adding filter, flange or delay to SoundEngine effects
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Re: adding filter, flange or delay to SoundEngine effects


  • Subject: Re: adding filter, flange or delay to SoundEngine effects
  • From: William Stewart <email@hidden>
  • Date: Fri, 13 Feb 2009 19:30:54 -0800


On Feb 13, 2009, at 9:15 AM, Morten Wagner wrote:

Hi all

I know this might be a too broad question - but still, i'm hoping for (pointers to) some help :-)

I'm doing an iPhone app with small bits of music, played by using the SoundEngine sample provided in the iPhone SDK's. I'd like to be able to apply some extra effects to the sounds being played, like filter, flanger or maybe even delay.

Please don't use this code. There are a number of problems with it and we have been advising people that we will not support it (it was never intended for public consumption)

So, first, a general comment:

If you are playing sounds that you need to mix and localise (typical game sounds) please use OpenAL
If you are playing long sounds - typical use case is say playing files - then the AVAudioPlayer is the place to look
If you need more control or a different type of interaction, then you can use AudioQueue directly with other APIs CA provides.


There are examples that show you how to use all three of these in both the iPhone and desktop examples

We'll be happy to answer your questions on these

Bill

It probably involves some pretty heavy math - and maybe even some processing during run-time in some kind of heav-loop... but i don't know really, where to begin....

..also, i'd like to actually record the sounds being played (kind of a down-mix, really). For that, I haven't been able to find anything either...

Comments, pointers, ideas more than WELCOME!!

Thx, audio gurus

/morten
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References: 
 >adding filter, flange or delay to SoundEngine effects (From: Morten Wagner <email@hidden>)

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