Audio Output Level Meter

[juankmin]

Hi... i'm a sound engineer and a new iOs developer and i need all your help... i want to develop an app that can predict the sound pressure level (SPL) in the user ears using headphones, no matter what the are doing in iPod, i mean the spl produced by the music player or a song played on youtube... what i have in mind it's to measure the iPod audio output level in dB Full-Scale, and then convert this value to spl based on some acoustics measurements i'm going to do with a binaural dummy head.

My question its obviously about the code... first, i don't know if it's possible to access to the audio output, and if it's possible to measure it.. i've been searching in some forums but it's not clear yet for me what to use.. Audio Queue Services or Audio Unit.. i know it's a little bit complicated but i need your help at least to get started...

Thanks for your help

Juan

[pure]

Originally Posted by juankmin

Hi... i'm a sound engineer and a new iOs developer and i need all your help... i want to develop an app that can predict the sound pressure level (SPL) in the user ears using headphones, no matter what the are doing in iPod, i mean the spl produced by the music player or a song played on youtube... what i have in mind it's to measure the iPod audio output level in dB Full-Scale, and then convert this value to spl based on some acoustics measurements i'm going to do with a binaural dummy head.

My question its obviously about the code... first, i don't know if it's possible to access to the audio output, and if it's possible to measure it.. i've been searching in some forums but it's not clear yet for me what to use.. Audio Queue Services or Audio Unit.. i know it's a little bit complicated but i need your help at least to get started...

Thanks for your help

Juan

Im not a professional in any means but i think this may help http://developer.apple.com/library/i...ioOverview.pdf

this core audio an apple framework that apple provides for audio in iOS and in Mac OSX
also navigate though iOS Developer Library and give some of the frameworks a read and they should help you this gives u acees to all apple support documents

I hope that helps

[jerryboy00]

Originally Posted by pure

Im not a professional in any means but i think this may help http://developer.apple.com/library/i...ioOverview.pdf

this core audio an apple framework that apple provides for audio in iOS and in Mac OSX
also navigate though iOS Developer Library and give some of the frameworks a read and they should help you this gives u acees to all apple support documents

I hope that helps