Hi,

I'm writing an iOS app that would be playing AAC/MP3/etc. streams in the 
background for extended periods of time, so I'd like to minimize its battery 
impact as much as possible. 

With the AudioConverter C API I could ask for a hardware codec via 
AudioConverterNewSpecific + kAppleHardwareAudioCodecManufacturer, but as of 
lately AVAudioEngine seems to be Apple's choice of audio API, so I would prefer 
to use that instead of the C API...

Is there any information on whether AVAudioConverter would offload audio 
conversion to the hardware decoder or not?

Best regards,
Tamás Zahola
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