[Openal] EFX Clarifications

[Christopher Fitzgerald]

Greetings,

> We do something a little bit different - but I don't think it will make much difference if you use the same formula for each non-None distance model.  Just make sure that for the non-clamped models (where distance can be less than Reference Distance) that the Air Absorption calculation doesn't actually amplify the signal ;)

So long as the OpenAL specification is being met, I'm happy with it being the same for all non-None distance models.  This way it's more consistently related to distance rather than attenuation due to distance.
 
> Dan

Thank you for your help. :)

Regards,
 - Christopher
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