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avaudiorecorder - Sample rate for iPhone audio recording ...
https://stackoverflow.com/questions/1622307/sample-rate-for-iphone-audio-recording#:~:text=On%20the%20iPhone%20with%20the%20built-in%20microphone%2C%20you%27re,mention.%20Also%2C%20make%20sure%20you%20record%20in%20mono.
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.
audio sample rate for video on iPhone X i… - Apple Community
https://discussions.apple.com/thread/8231869
It really is amazing that Apple uses 44.1. I cannot imagine what the thinking behind this is, except that all the other recording audio functions are 44.1 so they couldn’t be bothered to do audio for video competently.
Sample rate for iPhone audio recording - Genera Codice
https://www.generacodice.com/en/articolo/82301/Taux-d%27%C3%A9chantillonnage-pour-l%27enregistrement-audio-sur-iPhone
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.
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
3 Answers Active Oldest Votes 2 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. Share
iPhone Audio Recording Setting Sample Rate Seems Not …
https://stackoverflow.com/questions/8010458/iphone-audio-recording-setting-sample-rate-seems-not-to-be-working
iPhone Audio Recording Setting Sample Rate Seems Not To Be Working 0 When setting the sample rate in audio recording it seems that even though IOS says it is sampling at 8000k, it seems to be returning data for 44100k. This is from an IOS 5 iPHone, but the same is happening on IOS 4.x The code parts are as follows
Sample rate 44100 or 192000 ? When advisa… - Apple Community
https://discussions.apple.com/thread/8061449
Now if you assume you want to start the AA filter roll-off at 20kHz, and you allow the aliases to fold back down to 20kHz again, then the 44.1k sampling rate will allow you 2*(22.05-20)kHz = 4.1kHz roll-off range while 48kH will give you 2*(24-20)kHz = 8kHz.
What audio quality is available on newer iPhones? - Ask ...
https://apple.stackexchange.com/questions/276905/what-audio-quality-is-available-on-newer-iphones
TL;DR: It appears the iPhone 6 supports 24-bit audio and 48 kHz playback. So I found a way to empirically test playback. This first screenshot shows a recording of playback over iPhone USB into Quicktime. You can see from the spectrogram that there is data in the 22-24k range, which means that playback is at least 48 kHz.
How to play hi-res music on your iPhone | What Hi-Fi?
https://www.whathifi.com/us/advice/how-to-play-hi-res-music-your-iphone-0
The former supports audio at 24-bit/48kHz, but uses compression and has a maximum data rate of 576kbps. The latter supports up to 32-bit/96kHz over Bluetooth but only with a data rate of 990kbps. Both of these are lower than the data rate of CD (1411kbps) which isn’t technically hi-res... So how can the iPhone play hi-res music?
How to get 44.1 khz sample rate on iPhone XS max ...
https://forum.audiob.us/discussion/37617/how-to-get-44-1-khz-sample-rate-on-iphone-xs-max
Yes there is this too, and this is why some are trying to force a particular sampling rate....you can spot this happening if your app either crashes, or if your audio is slightly off pitch (either up or down depending on 44.1 assumed as 48, or 48 assumed as 44.1)
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