[Openal] Square wave with different frequencies

[Jason Daly]

etxmato wrote:
> So now my question is, does anyone have any recommendation on how to
> generate wave sounds (in my case a simple square wave is needed) with
> different frequencies. i.e:
> - Do I need to have 1 buffer for every frequency I might need? 
>   

This would probably be the best way, although if you like you can use 
pitch shifting to reduce the number of buffers you need.

> - If so how many buffers can I create? would it be ok to create around 1000
> (small) buffers?
>   

Sure.  That shouldn't be a problem, as long as you don't need to play 
more than a few at once.  Buffers (audio data in memory) aren't 
explicitly limited, but sources are.

> - Are there any other ways of changing the frequency of a specific sound
> buffer or source+buffer?
>   

No, you've pretty much covered the bases.


> - Maybe I should use another sound library?
>   

You might have better luck with another library, but if not, it sounds 
like OpenAL can do what you need (even though it might be a bit cumbersome).

In case you don't know, there is a function in ALUT that will generate 
square waves for you:

  alutCreateBufferWaveform(ALUT_WAVEFORM_SQUARE, frequency, phase, 
duration).


-- 

--"J"

"I'm a castaway stranded in a desolate land,
 I can see the footprints in the virtual sand."
	--Neil Peart