I'm trying to make an audio upload to S3 and I'm a little confused what I should declare my MIME type as. My audio file is an m4a recorded on an iPhone as kAudioFormatMPEG4AAC. Would this be consid...

I've got a motu UltraLite mk4 USB audio interface attached to a Mac running MacOS 10.13.3. I'm trying to play three stereo sound files, each to its own stereo speaker. To start with less complexi...

After loading an AVAsset like this: AVAsset *asset = [AVAsset assetWithURL:url]; I want to know what the Sampling Rate is of the Audio track. Currently, I am getting the Audio Track like this: ...

I have got two audio tracks on me that I combine with one another like this: AVMutableComposition *composition = [[AVMutableComposition alloc] init]; AVMutableCompositionTrack *compositionAudioTr...

Am looking to add a preview channel to an AV project, so that a video or audio file can be playing on the master output channel but the user can preview a separate audio or video file on a differen...

I've been searching the documentation, mailing lists on and off for a couple of days but can't seem to find the answer to this. I've got an OS X app that, amongst other things, queries the availab...

First, a little background info to explain my motivation: I've got a Qt/C++/Objective-C++ application that uses CoreAudio/AVFoundation to receive incoming audio from specified audio inputs on the M...

I've upgraded from Mojave to Catalina, and I noticed the fans on my MacBook Pro (15", 2019) are making a lot of noise. I looked into the Activity Monitor, and noticed that coreaudiod is constantly ...

we are working on a project which records voice from an external microphone. For analysis purposes, we need to have a sample rate of about 5k Hz. We are using AvAudioEngine to record a voice. We kn...

I'd like to record the some audio using AVAudioEngine and the users Microphone. I already have a working sample, but just can't figure out how to specify the format of the output that I want... My...

I am using pyaudio to record sounds on my Mac BigSur 11.6 (20G165). Specifically, I'm redirecting sound from an application to the input using BlackHole, which works fine. It usually works fine but...

Is there a way to record system audio without using a kernel extension in OS X. By system audio, I mean what is being played through the speakers. In looking around, I’ve found people advising doi...

I am looking to capture audio on OSX. I have IOS working with AVAudioSession, but since it is not supported on OSX, I'm having difficulty finding a simple example on OSX to record audio to a file f...

I want to get the internal audio output of the speaker on macOS with python. I got it working on Windows but I can't get it running on macOS. At the beginning we used PyAudio, but I figured that So...

In my app I need to switch between these 2 different AudioUnits. Whenever I switch from VPIO to RemoteIO, there is a drop in my recording volume. Quite a significant drop. No change in the playba...

I reading song from iPod library using assetUrl (in code it named audioUrl) I can play it many ways, I can cut it, I can make some precessing with this but... I really don't understand what I gonna...

The situation goes a little something like this: I am programming Xcode whilst concurrently listening to music on my Bluetooth headphones... you know to block out the world. Then, I go to launch ...

All the recent iPhones have 2+ microphones. Is it possible to record from all the microphones at the same time? If this is possible, what is the best iOS audio library for this (AudioKit, EzAudio, ...

I have this flow now: i record audio with AudioEngine, send it to an audio processing library and get an audio buffer back, then i have a strong will to write it to a wav file but i'm totally confu...

I have a really short audio file, say a 10th of a second in (say) .PCM format I want to use RemoteIO to loop through the file repeatedly to produce a continuous musical tone. So how do I read this...

I have my own sound engine written in C++ and it has some custom abilities. I have the decoded + processed PCM values in my engine but I need to somehow play this through a library on IOS. It works...

I'm trying to reverse audio in iOS with AVAsset and AVAssetWriter. The following code is working, but the output file is shorter than input. For example, input file has 1:59 duration, but output 1...

What is the data stored in CMSampleBuffer when using AVCaptureAudioDataOutput? It delivers CMSampleBuffers via delegate method –captureOutput:didOutputSampleBuffer:fromConnection: but what's inside...

I am loading Audio assets via AVAssets. I want to figure out how many channels (mono or stereo basically) are in the asset. What is the best way to do this?

I'm attempting to sync recorded audio (from an AVAudioEngine inputNode) to an audio file that was playing during the recording process. The result should be like multitrack recording where each sub...