2,506 questions
1
vote
0
answers
35
views
Switching default channels using Core Audio
I wrote a Swift macOS app to control a PCI audio device. The code switches input and output channels by default. As soon as I launch the Audio-Midi Setup utility and switch channels, my code stops ...
- 11
2
votes
0
answers
61
views
Swift AudioKit seek() function stops AudioPlayer looping
I'm building an audio app with XCode, using the AudioPlayer class from the AudioKit package to handle playback. When using AudioPlayer's seek() to seek to a specific point in an audio file, it works, ...
3
votes
0
answers
68
views
Core Audio: why are device UIDs issued by kAudioDevicePropertyDeviceUID unstable?
I maintain a macOS app that needs to recognize devices using the device's UID. To do this, I retrieve the device's UID using the kAudioDevicePropertyDeviceUID property, store that, and use it for ...
- 2,122
0
votes
1
answer
59
views
How to update AudioUnitSetProperty with URL argument for iOS 26?
My app can play Standard MIDI Files with an AVAudioUnitMIDIInstrument. I've been setting a sound font like this, where soundfontURL is a Swift URL object:
AudioUnitSetProperty(audioUnit, ...
- 9,133
4
votes
1
answer
72
views
How to get PID from AudioObjectID on macOS pre Sonoma
I am working on an application to get when audio device is being used.
This app runs on macOS.
For Mac versions starting from Sonoma I can use this code:
int getAudioProcessPID(AudioObjectID process)
...
- 903
1
vote
0
answers
42
views
AudioDriverKit example driver stops working
What I do:
Build the the AudioDriverKit example driver from Apple and install to an M1 Ipad.
Allow the driver in the settings.
Open some browser and go to Youtube.
Play some video.
Stop playback and ...
- 1,396
1
vote
1
answer
106
views
Why does AVAudioFormat fail to create a 4-channel PCM format for 44100/48000 Hz on Apple Silicon (M2) with AVFoundation?
I'm building a macOS audio batch processor in Swift using AVFoundation. I want to combine two stereo WAV files into a single 4-channel WAV file (either at 44100 Hz or 48000 Hz sample rate).
I've Tried:...
- 134
1
vote
0
answers
34
views
How to use AudioKit to make multi-track edit audio app
My need is to make a multi-track audio editor, for every individual audio clip, we can change speed, pitch, or volume of it, My idea is to make every one of them becomes an AVAudioPlayerNode (In ...
- 389
1
vote
0
answers
37
views
AVFoundation scale time range will cause noise points
I'm using AVFoundation to make a multi-track editor app, which can insert multiple track and clip, including scale some clip to change the speed of the clip, (also I'm not sure whether AVFoundation ...
- 389
0
votes
0
answers
62
views
The issue of aggregate device channels in voice isolation mode
I observed that the aggregate device works normally in standard microphone mode. However, in voice isolation mode, when retrieving input channels, only the first sub-device's input channel count in ...
- 71
1
vote
1
answer
46
views
MacOS AudioHardwareSystem leak
I love the syntax for the new CoreAudio API. Unfortunately it seems to leak like a sieve. Is there anyway to avoid the leaks without needing to go back to the old API?
This code leaks.
func ...
- 63
1
vote
1
answer
81
views
The issue of switching the clock source on devices
I am using SimplyCoreAudio to switch the clock source. The code is as follows：
debugPrint("nullAudioDevice.clockSourceID \(nullAudioDevice.clockSourceID)")
if let cid = ...
- 71
1
vote
0
answers
39
views
Trouble compiling on tvOS
I'm trying to use AudioKit in tvOS, but I'm running into a compiler issue.
When I try to compile my project I'm getting the following error in Settings.swift.
'isiOSAppOnMac' is only available in tvOS ...
- 11
1
vote
1
answer
61
views
How do you properly use CoreAudio Render Callbacks in Swift
I've recently got interested in generated audio again, but I'm having a bit of trouble. I've been following this tutorial, and converting it into Swift:
https://gist.github.com/gcatlin/...
- 9,443
0
votes
0
answers
47
views
Why is `sessionManager.GetSessionEnumerator` always failing with an AccessViolationException?
I've been working on a C# application that interfaces with the Windows Audio APIs to check the processes used by the primary render device. However, I keep encountering an issue where the call to ...
- 2,341