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Re: Two questions
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Re: Two questions


  • Subject: Re: Two questions
  • From: Marc Poirier <email@hidden>
  • Date: Thu, 14 Aug 2003 18:04:36 -0500 (CDT)

> Also, I have a question about GetParameterValueStrings. This call would
> appear to be there for the purpose of providing human-readable values for
> generic float parameters, but I can't find any documentation on it.

/Developer/Documentation/CoreAudio/AudioUnits/Topics/au_properties.html#kAudioUnitProperty_ParameterValueStrings

But as you'll see, it's not for float, or at least float in the sense of
continuous, parameters. It's for parameters that have descrete choices,
with unit type kAudioUnitParameterUnit_Indexed. What you are looking for
is not here yet but will come with the next update, as Bill mentioned a
couple days ago, with a new kAudioUnitProperty_ParameterValueName
property.

> How is it used, and do I have to set any special flags on the parameters
> for my reported values ("-6dB") to be made visible in the host (instead
> of "0.500")

Of course, you could also make the parameter's unit type be
kAudioUnitParameterUnit_Decibels and provide the parameter's value range
in the actual dB range (or something close enough, since probably won't
want to make the minimum literally -infinity). But maybe that doesn't
work well for your particular case, I don't know...

Marc
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References: 
 >Two questions (From: "Angus F. Hewlett" <email@hidden>)

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