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“Popping Sound”

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MusicSequenceSetUserCallback not called during playback on macOS despite successful registration
Hello, I am developing a macOS app using AudioToolbox's MusicSequence and MusicPlayer APIs to play Standard MIDI Files. The MIDI playback works correctly and I can hear sound from the external MIDI device. However, the user callback registered via MusicSequenceSetUserCallback is never invoked during playback. Details: Callback registration returns no error. MusicPlayer is properly started and prerolled. The callback is defined as a global function with the correct @convention(c) signature. I have tried commenting out MusicTrackSetDestMIDIEndpoint to avoid known callback suppression issues. The clientData pointer is passed and correctly unwrapped in the callback. Minimal reproducible example shows the same behavior. Environment: macOS version: [Tahoe 26.2] Xcode version: [26.2] Is it expected that MusicSequenceSetUserCallback callbacks may not be called in some cases? Are there additional steps or configurations required to ensure the callback is triggered during MIDI playback? Thank you for any advic
1
0
510
Dec ’25
There are still preview uploads in progress.
Hello everyone, I’m stuck with an App Store Connect issue and would really appreciate any insight from the community. I am unable to submit my app for review due to the following persistent error: “Unable to Add for Review – There are still preview uploads in progress.” What makes this particularly confusing is that there are no previews currently uploading. Here is everything I have already tried: Deleted all App Preview videos and all screenshots Confirmed Media Manager shows no active uploads Re-uploaded App Preview videos fully compliant with Apple specs: H.264 AAC stereo audio Constant 30 FPS Correct resolution Uploaded a new build with a higher build number (Build 3) Waited more than 24 hours after upload Logged out / logged in, refreshed, tried multiple browsers and sessions Confirmed TestFlight build upload completed successfully Despite all of this, the error persists and also prevents: Adding the app for review Creating a new app version (the “Add Version” button does not appear) Apple Deve
2
0
240
Dec ’25
Reply to MKReverseGeocodingRequest and CNPostalAddress from MKMapItem
Hello, my app is designed for frequent travelers. It's kind of a collectors book. The user collects continents, countries, states, cities, sub-cities, rivers, seas etc. All the required data for that were well provided by CLPlacemark ... I also understand, that you try to provide good quality in the presentation of the (postal) addresses. The new API looks quiet good for this purpose. I never constructed a postal address by my own, as I understand the difficulties to build a proper postal address based on the users local needs. For that I used the postalAddress of CLPlacemark. Are there other ways to get this detailed informations? I really enjoyed the detailed data/Infos of the CLPlacemarks. Used to that richness of content and now seeing the puristic MapItem address strings is similar to be used to modern HDR-TVs and suddenly fall back to a Black&White TV from the 1960. So far new APIs were allways some kind of a better way to achieve something. Well some better, some not so good.. but it was always fai
Dec ’25
Singular Sound MIDI Maestro App BLE Communications Issue
When trying to use the MIDI Maestro app by Singular Sound, BLE peripherals experience unwanted connection-parameter renegotiation and disconnections on iOS 26, beta iOS 26.2 does not fix this issue. iOS 26 BLE communications are being sent too fast to be read correctly by the hardware device, and iOS 26.2 refuses communication altogether.
1
0
227
Dec ’25
Reply to Cannot make my app appear in “Share with App” action in Shortcuts – How to allow receiving images from Shortcuts?
When using App Intent, I noticed that we cannot process the image directly within the invoked UI. It appears that this is restricted by Apple’s privacy protections—any attempt to handle the data immediately results in the background privacy indicator showing a blocked status. Therefore, App Intent does not seem to meet our need to process user-provided images directly. This sounds like you implemented a UI snippet as part of your intent, and not all SwiftUI features are available in a UI snippet — for example, these snippets aren't interactive. Details here matter, so to discuss how you can build an intent that works for your needs, it'd be helpful to have a test project or test code that demonstrates what you tried and where you ran into trouble so that we can more fully explore this. — Ed Ford,  DTS Engineer
Dec ’25
Reply to Home App Intermittent Hub Not Responding Bug
Third-party apps have been mentioned a few times, so I wanted to clarify what's going on there. Let me start by going back to the post that started all of this to explain what's actually happening here: When I launch the app, it indicates that the hub is not responding, and all of my devices are unavailable. One of the fundamental problems with all network applications is that: a) Users want to know whether or not something will work before they perform that action. b) Networking is an inherently high-latency activity with unpredictable results. Putting that in concrete terms, how does an app know that an accessory (or any network connection) is working, given that a hammer, shovel, or power outage could destroy the device or infrastructure the app is relying on? The app can check whether or not something is working by doing some kind of communication, but ALL that will tell that app is that the connection... worked in the past. It won't actually guarantee ANYTHING about the operation you're doing now. The an
Topic: App & System Services SubTopic: General Tags:
Dec ’25
How to monitor heart rate in background without affecting Activity Rings?
I'm developing a watchOS nap app that detects when the user falls asleep by monitoring heart rate changes. == Technical Implementation == HKWorkoutSession (.mindAndBody) for background execution HKAnchoredObjectQuery for real-time heart rate data CoreMotion for movement detection == Battery Considerations == Heart rate monitoring ONLY active when user explicitly starts a session Monitoring continues until user is awakened OR 60-minute limit is reached If no sleep detected within 60 minutes, session auto-ends (user may have abandoned or forgotten to stop) App displays clear UI indicating monitoring is active Typical session: 15-30 minutes, keeping battery usage minimal == The Problem == HKWorkoutSession affects Activity Rings during the session. Users receive Exercise goal reached notifications while resting — confusing. == What I've Tried == Not using HKLiveWorkoutBuilder → Activity Rings still affected Using builder but not calling finishWorkout() (per https://developer.apple.com/forums/thread/780220) → Acti
6
0
552
Dec ’25
Perfect month award fitness app on iPhone
Hi! I have over 800 days strike in closing my move circle. However oerfect month badge is not popping up for November, we have now mid of Dec and still no update. I updated iOS to 26, did multiple resets and hard resets and still no badge. I checked many forums and post but any of given tips is working in my case. i know it sounds funny, but it’s frustrating that I’m not getting this little gold medal to keep me motivated 😅 does anyone know how to deal with it? Is it common issue?
2
0
192
Dec ’25
Reply to Critical CallKit Issue: Audio Route Flapping due to reason: 3 (CategoryChange) after User Toggle
I am facing a severe audio routing instability issue when using CallKit and the Zego Express SDK on iOS. The problem is that the audio route immediately reverts from the Speaker back to the Earpiece, effectively disabling the Speaker button functionality. 📝 Are you able to reproduce the problem in our sample code (Speakerbox)? Observed BehaviorWhen the user taps the native CallKit Speaker Button, the audio route is correctly changed to the Speaker, but then instantly flips back to the Receiver (Earpiece), as shown in the system log captured via AVAudioSession.routeChangeNotification monitoring. 🧾 Log Evidence (Flapping Occurs in 0.4 seconds)The following log snippet clearly illustrates the system overriding the user's action (reason: 4) with an unexpected CategoryChange (reason: 3) event: I think this is a problem with the library, specifically because of this: with an unexpected CategoryChange (reason: 3) event: CallKit is tightly integrated with the audio system because
Topic: App & System Services SubTopic: General Tags:
Dec ’25
Reply to CarPlay: AVSpeechUtterance not speaking/playing audio in some cars
I also having an issue with AVSpeechUtterance on CarPlay, specifically on Wireless Carplay. Im getting an error IPCAUClient.cpp:129 IPCAUClient: bundle display name is nil or IPCAUClient.cpp:139 IPCAUClient: can't connect to server (-66748) after speechSynthesizer.speak(speechUtterance) and my audio is not being played or all the audio, including from other app audio become very choppy.
Topic: UI Frameworks SubTopic: UIKit Tags:
Dec ’25
Reply to WiFi aware demo paring issue
We are also facing similar issue the follow-up frames I send are not receiving any response. . Did you get any response from apple or breakthrough for this? As per my understanding, once initiate bootstrapping follow up frame and apple device respond with follow up frame. it may be pop up pin which need to use for PASN exchange later.
Dec ’25
Speed AppleTV > Distorted HomePod Audio
Hey everyone. Ever since installed OS26 (and 26.1 now) - whenever I fast play any video on 1.25x, 1.5x, 2x on the AppleTV - the audio gets massively distorted on HomePods. Be it on YouTube, Difuse, or any supporting app. I even tried mirroring from iPhone -same issue. Anyone else experiencing the same? I noticed no posts about troubleshooting.
2
0
112
Dec ’25
Reply to For receiving audio in PushtoTalk, channelManager(_:didActivate:) not called when app receives first push after backgrounding
And when PTT notification arrives, saving the URL to the audio file in incomingPushResult, then downloading and playing that sound using AVAudioPlayer when didActivate is executed. It's working fine on the foreground, but when the app goes to the background, incomingPushResult is called as expected, but didActivate is not for some reason. Am I missing anything in my setup? Yes. The issue here is that you can't use AVAudioPlayer, as it does its own AudioSession activation. More specifically: It's working fine on the foreground. It works in the foreground app because the foreground app has inherent access to the audio system and can do whatever it wants. However: when the app goes to the background, incomingPushResult is called as expected, but didActivate is not for some reason. ...what happens in the background is that the same activation attempt then occurs and either fails entirely or succeeds (partially) but is then disrupted by callservicesd's own activation. Unfortunately, you'
Topic: App & System Services SubTopic: General Tags:
Dec ’25
AVPlayerViewController volume slider UI changes but audio output level remains constant
Facing an issue with audio playback using AVPlayerViewController in iOS application. We are using the native player to play recorded audio files. When the AVPlayerViewController appears, the native user interface is displayed correctly, including the playback controls and the volume slider. However, when the user interacts with the volume slider The slider UI moves and responds to touch events. The actual audio output volume does not change. The audio continues playing at the initial volume level regardless of the slider position. We initialize the player and present it modally using the following code: AVPlayerViewController *avController = [[AVPlayerViewController alloc] init]; avController.player = [AVPlayer playerWithURL:videoURL]; // Setting initial volume avController.player.volume = 1.0f; avController.modalPresentationStyle = UIModalPresentationOverFullScreen; avController.allowsPictureInPicturePlayback = NO; // Present the controller [self presentViewController:avCo
0
0
134
Dec ’25
MusicSequenceSetUserCallback not called during playback on macOS despite successful registration
Hello, I am developing a macOS app using AudioToolbox's MusicSequence and MusicPlayer APIs to play Standard MIDI Files. The MIDI playback works correctly and I can hear sound from the external MIDI device. However, the user callback registered via MusicSequenceSetUserCallback is never invoked during playback. Details: Callback registration returns no error. MusicPlayer is properly started and prerolled. The callback is defined as a global function with the correct @convention(c) signature. I have tried commenting out MusicTrackSetDestMIDIEndpoint to avoid known callback suppression issues. The clientData pointer is passed and correctly unwrapped in the callback. Minimal reproducible example shows the same behavior. Environment: macOS version: [Tahoe 26.2] Xcode version: [26.2] Is it expected that MusicSequenceSetUserCallback callbacks may not be called in some cases? Are there additional steps or configurations required to ensure the callback is triggered during MIDI playback? Thank you for any advic
Replies
1
Boosts
0
Views
510
Activity
Dec ’25
There are still preview uploads in progress.
Hello everyone, I’m stuck with an App Store Connect issue and would really appreciate any insight from the community. I am unable to submit my app for review due to the following persistent error: “Unable to Add for Review – There are still preview uploads in progress.” What makes this particularly confusing is that there are no previews currently uploading. Here is everything I have already tried: Deleted all App Preview videos and all screenshots Confirmed Media Manager shows no active uploads Re-uploaded App Preview videos fully compliant with Apple specs: H.264 AAC stereo audio Constant 30 FPS Correct resolution Uploaded a new build with a higher build number (Build 3) Waited more than 24 hours after upload Logged out / logged in, refreshed, tried multiple browsers and sessions Confirmed TestFlight build upload completed successfully Despite all of this, the error persists and also prevents: Adding the app for review Creating a new app version (the “Add Version” button does not appear) Apple Deve
Replies
2
Boosts
0
Views
240
Activity
Dec ’25
Reply to MKReverseGeocodingRequest and CNPostalAddress from MKMapItem
Hello, my app is designed for frequent travelers. It's kind of a collectors book. The user collects continents, countries, states, cities, sub-cities, rivers, seas etc. All the required data for that were well provided by CLPlacemark ... I also understand, that you try to provide good quality in the presentation of the (postal) addresses. The new API looks quiet good for this purpose. I never constructed a postal address by my own, as I understand the difficulties to build a proper postal address based on the users local needs. For that I used the postalAddress of CLPlacemark. Are there other ways to get this detailed informations? I really enjoyed the detailed data/Infos of the CLPlacemarks. Used to that richness of content and now seeing the puristic MapItem address strings is similar to be used to modern HDR-TVs and suddenly fall back to a Black&White TV from the 1960. So far new APIs were allways some kind of a better way to achieve something. Well some better, some not so good.. but it was always fai
Replies
Boosts
Views
Activity
Dec ’25
Singular Sound MIDI Maestro App BLE Communications Issue
When trying to use the MIDI Maestro app by Singular Sound, BLE peripherals experience unwanted connection-parameter renegotiation and disconnections on iOS 26, beta iOS 26.2 does not fix this issue. iOS 26 BLE communications are being sent too fast to be read correctly by the hardware device, and iOS 26.2 refuses communication altogether.
Replies
1
Boosts
0
Views
227
Activity
Dec ’25
Reply to Cannot make my app appear in “Share with App” action in Shortcuts – How to allow receiving images from Shortcuts?
When using App Intent, I noticed that we cannot process the image directly within the invoked UI. It appears that this is restricted by Apple’s privacy protections—any attempt to handle the data immediately results in the background privacy indicator showing a blocked status. Therefore, App Intent does not seem to meet our need to process user-provided images directly. This sounds like you implemented a UI snippet as part of your intent, and not all SwiftUI features are available in a UI snippet — for example, these snippets aren't interactive. Details here matter, so to discuss how you can build an intent that works for your needs, it'd be helpful to have a test project or test code that demonstrates what you tried and where you ran into trouble so that we can more fully explore this. — Ed Ford,  DTS Engineer
Replies
Boosts
Views
Activity
Dec ’25
Reply to Home App Intermittent Hub Not Responding Bug
Third-party apps have been mentioned a few times, so I wanted to clarify what's going on there. Let me start by going back to the post that started all of this to explain what's actually happening here: When I launch the app, it indicates that the hub is not responding, and all of my devices are unavailable. One of the fundamental problems with all network applications is that: a) Users want to know whether or not something will work before they perform that action. b) Networking is an inherently high-latency activity with unpredictable results. Putting that in concrete terms, how does an app know that an accessory (or any network connection) is working, given that a hammer, shovel, or power outage could destroy the device or infrastructure the app is relying on? The app can check whether or not something is working by doing some kind of communication, but ALL that will tell that app is that the connection... worked in the past. It won't actually guarantee ANYTHING about the operation you're doing now. The an
Topic: App & System Services SubTopic: General Tags:
Replies
Boosts
Views
Activity
Dec ’25
Reply to Testing DeclaredAgeRange APIs
Doc is not accurate. Navigate to Developer, then scroll down and tap on the sandbox apple account email. pop up appear. Then tap on Manage, scroll down and you would see Age Assurance
Topic: App & System Services SubTopic: General Tags:
Replies
Boosts
Views
Activity
Dec ’25
How to monitor heart rate in background without affecting Activity Rings?
I'm developing a watchOS nap app that detects when the user falls asleep by monitoring heart rate changes. == Technical Implementation == HKWorkoutSession (.mindAndBody) for background execution HKAnchoredObjectQuery for real-time heart rate data CoreMotion for movement detection == Battery Considerations == Heart rate monitoring ONLY active when user explicitly starts a session Monitoring continues until user is awakened OR 60-minute limit is reached If no sleep detected within 60 minutes, session auto-ends (user may have abandoned or forgotten to stop) App displays clear UI indicating monitoring is active Typical session: 15-30 minutes, keeping battery usage minimal == The Problem == HKWorkoutSession affects Activity Rings during the session. Users receive Exercise goal reached notifications while resting — confusing. == What I've Tried == Not using HKLiveWorkoutBuilder → Activity Rings still affected Using builder but not calling finishWorkout() (per https://developer.apple.com/forums/thread/780220) → Acti
Replies
6
Boosts
0
Views
552
Activity
Dec ’25
Perfect month award fitness app on iPhone
Hi! I have over 800 days strike in closing my move circle. However oerfect month badge is not popping up for November, we have now mid of Dec and still no update. I updated iOS to 26, did multiple resets and hard resets and still no badge. I checked many forums and post but any of given tips is working in my case. i know it sounds funny, but it’s frustrating that I’m not getting this little gold medal to keep me motivated 😅 does anyone know how to deal with it? Is it common issue?
Replies
2
Boosts
0
Views
192
Activity
Dec ’25
Reply to Critical CallKit Issue: Audio Route Flapping due to reason: 3 (CategoryChange) after User Toggle
I am facing a severe audio routing instability issue when using CallKit and the Zego Express SDK on iOS. The problem is that the audio route immediately reverts from the Speaker back to the Earpiece, effectively disabling the Speaker button functionality. 📝 Are you able to reproduce the problem in our sample code (Speakerbox)? Observed BehaviorWhen the user taps the native CallKit Speaker Button, the audio route is correctly changed to the Speaker, but then instantly flips back to the Receiver (Earpiece), as shown in the system log captured via AVAudioSession.routeChangeNotification monitoring. 🧾 Log Evidence (Flapping Occurs in 0.4 seconds)The following log snippet clearly illustrates the system overriding the user's action (reason: 4) with an unexpected CategoryChange (reason: 3) event: I think this is a problem with the library, specifically because of this: with an unexpected CategoryChange (reason: 3) event: CallKit is tightly integrated with the audio system because
Topic: App & System Services SubTopic: General Tags:
Replies
Boosts
Views
Activity
Dec ’25
Reply to CarPlay: AVSpeechUtterance not speaking/playing audio in some cars
I also having an issue with AVSpeechUtterance on CarPlay, specifically on Wireless Carplay. Im getting an error IPCAUClient.cpp:129 IPCAUClient: bundle display name is nil or IPCAUClient.cpp:139 IPCAUClient: can't connect to server (-66748) after speechSynthesizer.speak(speechUtterance) and my audio is not being played or all the audio, including from other app audio become very choppy.
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
Boosts
Views
Activity
Dec ’25
Reply to WiFi aware demo paring issue
We are also facing similar issue the follow-up frames I send are not receiving any response. . Did you get any response from apple or breakthrough for this? As per my understanding, once initiate bootstrapping follow up frame and apple device respond with follow up frame. it may be pop up pin which need to use for PASN exchange later.
Replies
Boosts
Views
Activity
Dec ’25
Speed AppleTV > Distorted HomePod Audio
Hey everyone. Ever since installed OS26 (and 26.1 now) - whenever I fast play any video on 1.25x, 1.5x, 2x on the AppleTV - the audio gets massively distorted on HomePods. Be it on YouTube, Difuse, or any supporting app. I even tried mirroring from iPhone -same issue. Anyone else experiencing the same? I noticed no posts about troubleshooting.
Replies
2
Boosts
0
Views
112
Activity
Dec ’25
Reply to For receiving audio in PushtoTalk, channelManager(_:didActivate:) not called when app receives first push after backgrounding
And when PTT notification arrives, saving the URL to the audio file in incomingPushResult, then downloading and playing that sound using AVAudioPlayer when didActivate is executed. It's working fine on the foreground, but when the app goes to the background, incomingPushResult is called as expected, but didActivate is not for some reason. Am I missing anything in my setup? Yes. The issue here is that you can't use AVAudioPlayer, as it does its own AudioSession activation. More specifically: It's working fine on the foreground. It works in the foreground app because the foreground app has inherent access to the audio system and can do whatever it wants. However: when the app goes to the background, incomingPushResult is called as expected, but didActivate is not for some reason. ...what happens in the background is that the same activation attempt then occurs and either fails entirely or succeeds (partially) but is then disrupted by callservicesd's own activation. Unfortunately, you'
Topic: App & System Services SubTopic: General Tags:
Replies
Boosts
Views
Activity
Dec ’25
AVPlayerViewController volume slider UI changes but audio output level remains constant
Facing an issue with audio playback using AVPlayerViewController in iOS application. We are using the native player to play recorded audio files. When the AVPlayerViewController appears, the native user interface is displayed correctly, including the playback controls and the volume slider. However, when the user interacts with the volume slider The slider UI moves and responds to touch events. The actual audio output volume does not change. The audio continues playing at the initial volume level regardless of the slider position. We initialize the player and present it modally using the following code: AVPlayerViewController *avController = [[AVPlayerViewController alloc] init]; avController.player = [AVPlayer playerWithURL:videoURL]; // Setting initial volume avController.player.volume = 1.0f; avController.modalPresentationStyle = UIModalPresentationOverFullScreen; avController.allowsPictureInPicturePlayback = NO; // Present the controller [self presentViewController:avCo
Replies
0
Boosts
0
Views
134
Activity
Dec ’25