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Re: normalize AVAudioRecorder iPhone
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Re: normalize AVAudioRecorder iPhone


  • Subject: Re: normalize AVAudioRecorder iPhone
  • From: tahome izwah <email@hidden>
  • Date: Tue, 5 Jan 2010 20:58:53 +0100

Try miniAiff, it doesn't get any easier than that:

http://www.dspdimension.com/admin/miniaiff/

I've been using it in a lot of projects where the EAF API was too
complicated and heavyweight (and not cross platform either) to make
sense.

HTH
--th

2010/1/5 Harry G <email@hidden>:
> Sorry for the noob question but could someone point me in the right
> direction to normalise an aif please? I have looked at the specification of
> an aif file and it looks like hard work to process the raw file.
> Are there any standard tools in place that would make life easier, such as a
> something like this pseudo code...
> aStream[] = getStreamFromAifFile(@"myAifFile.aif");
> streamSize = getStreamSizeFromAifFile(@"myAifFile.aif");
> for(i =0;i<streamSize;i++){
> aStream[i] += .5;
> }
>
> replaceAifStreamWithStream(@"myAifFile.aif", aStream);
>
> im probably using the wrong terminology above (stream). Any pointers would
> be really very much appreciated, I feel that there must be a simplified or
> abstracted method of processing an aif file out there?
>
> On 4 Jan 2010, at 16:50, Savvas Constantinides wrote:
>
> Not sure about another way but normalizing means picking the highest peak in
> the audio signal and raising all of the audio samples in such a way so that
> the highest peak is at the required db level.
> In simple words multiply all of the samples with the same number.
>
>> From: email@hidden
>> Date: Mon, 4 Jan 2010 16:46:17 +0000
>> To: email@hidden
>> Subject: normalize AVAudioRecorder iPhone
>>
>> Hi, I'm recording audio on the iPhone with AVAudioRecorder, but it's
>> really quiet, I'm presuming the best way to rectify this is to normalize the
>> recorded audio? Or is there another way that I have missed that elevates the
>> sound level of recorded audio? If normalize, how would I achieve this, run
>> an AU?
>>
>> Thanks. _______________________________________________
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References: 
 >normalize AVAudioRecorder iPhone (From: Harry G <email@hidden>)
 >RE: normalize AVAudioRecorder iPhone (From: Savvas Constantinides <email@hidden>)
 >Re: normalize AVAudioRecorder iPhone (From: Harry G <email@hidden>)

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