Core Audio Sample Rate Conversion

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What Is Core Audio? - Apple Developer

https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/WhatisCoreAudio/WhatisCoreAudio.html

Most Core Audio services use and manipulate audio in linear pulse-code-modulated (linear PCM) format, the most common uncompressed digital audio data format. Digital audio recording creates PCM data by measuring an analog (real world) audio signal’s magnitude at regular intervals (the sampling rate ) and converting each sample to a numerical …

core audio - IOS: AudioUnit RemoteIO Sample rate …

https://stackoverflow.com/questions/68499351/ios-audiounit-remoteio-sample-rate-automatic-conversion

Is there a way to configure RemoteIO to work with a fixed sample rate on my end where I render audio and let it do the sample rate conversion when there is a mismatch between the sample rate I use vs the hardware sample rate? ... core-audio audiounit remoteio. Share. Improve this question. Follow asked Jul 23 '21 at 12:40. ... AudioConverterRef ...

Core Audio Essentials - Apple Developer

https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/CoreAudioEssentials/CoreAudioEssentials.html

Note: An audio data format describes audio data per se, including such things as sample rate, bit depth, and packetization. An audio file format describes how audio data, audio metadata, and filesystem metadata for a sound file are arranged on disk. Some audio file formats can contain just one sort of audio data format (for instance, an MP3 file can contain only MP3 …

iphone - OS X / iOS - Sample rate conversion for a buffer ...

https://stackoverflow.com/questions/6610958/os-x-ios-sample-rate-conversion-for-a-buffer-using-audioconverterfillcomplex

void CoreAudio_AudioManager::_convertStream(Buffer* buffer, unsigned char** stream, int *streamSize) { if (buffer->getBitsPerSample() != unitDescription.mBitsPerChannel || buffer->getChannels() != unitDescription.mChannelsPerFrame || buffer->getSamplingRate() != unitDescription.mSampleRate) { printf("INPUT STREAM SIZE: %d\n", *streamSize); // describe …

GitHub - depp/libfresample: Fast audio sample rate ...

https://github.com/depp/libfresample

Fast audio sample rate conversion with simplified BSD license - GitHub - depp/libfresample: Fast audio sample rate conversion with simplified BSD license ... 3.2 GHz AMD Phenom II, GCC 4.7 (circa 2010) System D: 1.7 GHz Intel Core i5, Clang 4.0 (circa 2012) Task: Resample 16-bit stereo audio from 48 kHz to 44.1 kHz Speed: 1x is realtime, 2x is ...

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