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avaudiorecorder - Sample rate for iPhone audio recording ...
https://stackoverflow.com/questions/1622307/sample-rate-for-iphone-audio-recording
On the iPhone with the built-in microphone, you're going to get a maximum of 8 kHz. If you use a headset, you can get 44.1 kHz. If you're using the built-in mic and setting your recording sample rate to 44.1 kHz, you're upsampling the audio, which is unnecessary and generates the big files you mention. Also, make sure you record in mono.
iPhone 6s sample rate quality issu… | Apple Developer …
https://developer.apple.com/forums/thread/20677
The iPhone 6s RemoteIO Audio Unit appears to default to a hardware sample rate of 48000 sps. When my app requests a preferred output sample rate of 44100 on an iPhone 6s, the automatic resampling from 48k to 44.1k appears to be low quality and noisy (appears to adds a lot of spectral aliasing).
What is the maximum sample rate/bit depth of the iPhone ...
https://sound.stackexchange.com/questions/15226/what-is-the-maximum-sample-rate-bit-depth-of-the-iphone-for-recording
I'm 99.9% sure it's 48kHz, 16-bit Mono (or Stereo if you have a plug-in mic of some sort which supports Stereo). I use the FiRe app which is one of the most comprehensive and professional-geared recording apps, and that's the max it supports. On older iPhones like the 3G I believe it was only 44.1kHz.
Configuring Device Hardware - Apple Developer
https://developer.apple.com/library/archive/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/OptimizingForDeviceHardware/OptimizingForDeviceHardware.html
Query many hardware characteristics, such as input and output latency, input and output channel count, hardware sample rate, hardware volume setting, and availability of audio input. Choosing Preferred Audio Hardware Values. Use the audio session to specify your preferred device settings, such as sample rate and hardware I/O buffer duration.
What audio quality is available on newer iPhones? - Ask ...
https://apple.stackexchange.com/questions/276905/what-audio-quality-is-available-on-newer-iphones
There appear to be vendors who sell USB audio ADCs and DACs that claim to be iOS compatible (via the Lightning Camera connection kit) and also claim sample rates of 96k and 192k. Share Improve this answer answered Mar 20 '17 at 22:45 hotpaw2 5,313 4 21 36 Add a comment 1
How can I obtain the native (hardware-supported) audio ...
https://stackoverflow.com/questions/20889902/how-can-i-obtain-the-native-hardware-supported-audio-sampling-rates-in-order-t
The hardware sample rate you want to use. The available range for hardware sample rate is device dependent. It typically ranges from 8,000 through 48,000 hertz.
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