# \#ios **URL:** https://qa.fmod.com/tag/ios/4.md [Latest](https://qa.fmod.com/latest.md) · [Categories](https://qa.fmod.com/categories.md) · [Tags](https://qa.fmod.com/tags.md) --- ## [\[iOS\] Raw PCM data corrupted with distortion/echo on subsequent recording sessions](https://qa.fmod.com/t/ios-raw-pcm-data-corrupted-with-distortion-echo-on-subsequent-recording-sessions/24355)
**Author:** [@vasilkotsev](https://qa.fmod.com/u/vasilkotsev)\ **Replies:** 12\ **Last updated:** [September 11, 2026, 6:23am UTC](https://qa.fmod.com/t/ios-raw-pcm-data-corrupted-with-distortion-echo-on-subsequent-recording-sessions/24355 "2026-09-11T06:23:54Z")
Hello! I am writing to report a problem I ran into when implementing voice recording on iOS via a capture DSP. Here are the details of the issue, and how I resolved it (in case someone runs into this problem). FMOD Ver… --- ## [FMOD\_STUDIO\_INIT\_SYNCHRONOUS\_UPDATE and FMOD\_INIT\_MIX\_FROM\_UPDATE](https://qa.fmod.com/t/fmod-studio-init-synchronous-update-and-fmod-init-mix-from-update/24437)
**Author:** [@marko.ravnjak](https://qa.fmod.com/u/marko.ravnjak)\ **Replies:** 8\ **Last updated:** [September 1, 2026, 7:35am UTC](https://qa.fmod.com/t/fmod-studio-init-synchronous-update-and-fmod-init-mix-from-update/24437 "2026-09-01T07:35:17Z")
FMOD 2.03.14 with custom engine integration I’ve setup fmod integration, got everything to build. Audio works on windows, mac os, android but not ios. On ios i get no errors, everything inits ok. Initially I added the … --- ## [iOS hangs waiting on FMOD5\_Reverb3D\_GetUserData](https://qa.fmod.com/t/ios-hangs-waiting-on-fmod5-reverb3d-getuserdata/24402)
**Author:** [@zanhulme](https://qa.fmod.com/u/zanhulme)\ **Replies:** 0\ **Last updated:** [July 16, 2026, 12:10am UTC](https://qa.fmod.com/t/ios-hangs-waiting-on-fmod5-reverb3d-getuserdata/24402 "2026-07-16T00:10:34Z")
Hello, We’ve been receiving reports from Apple that a high percentage of all hangs occur during an FMOD function. Unfortunately we get very little info and no context for these reports, so we don’t know when it happens … --- ## [FMOD iOS App Hang on Resume: "The app was terminated while unresponsive"](https://qa.fmod.com/t/fmod-ios-app-hang-on-resume-the-app-was-terminated-while-unresponsive/24326)
**Author:** [@PandaJoker](https://qa.fmod.com/u/PandaJoker)\ **Replies:** 5\ **Last updated:** [July 8, 2026, 6:38am UTC](https://qa.fmod.com/t/fmod-ios-app-hang-on-resume-the-app-was-terminated-while-unresponsive/24326 "2026-07-08T06:38:57Z")
Hi everyone, I’m encountering a persistent issue with FMOD in my Unity project on iOS. When the app resumes from the background, the OS occasionally terminates it with the error: “The app was terminated while unresponsi… --- ## [Unity WebGL minimization causes sound to disappear](https://qa.fmod.com/t/unity-webgl-minimization-causes-sound-to-disappear/23369)
**Author:** [@tony020409](https://qa.fmod.com/u/tony020409)\ **Replies:** 3\ **Last updated:** [April 14, 2026, 5:48am UTC](https://qa.fmod.com/t/unity-webgl-minimization-causes-sound-to-disappear/23369 "2026-04-14T05:48:28Z")
I am currently encountering a similar issue as in this post, but my platform is Unity WebGL. https://qa.fmod.com/t/fmod-unity-ios-no-sound-after-app-resume-or-ad-even-after-upgrading-to-2-02-28/22836 My WebGL is embed… --- ## [Unity在iOS遇到了音频突然全部停止的问题](https://qa.fmod.com/t/unity-ios/23664)
**Author:** [@botp](https://qa.fmod.com/u/botp)\ **Replies:** 4\ **Last updated:** [November 20, 2025, 4:20am UTC](https://qa.fmod.com/t/unity-ios/23664 "2025-11-20T04:20:11Z")
在iOS启动游戏后一段时间，开始出现这样的报错（启动了Enable API Error Logging）： \[FMOD\] ChannelControl::isPlaying(0x171e366af:false) returned ERR\_CHANNEL\_STOLEN for CHANNELCONTROL (0xE40045). \[FMOD\] ChannelControl::stop() returned ERR\_CHANNEL\_ST… --- ## [The issue of no sound in Unity WebGL after watching an ad and returning to the game screen](https://qa.fmod.com/t/the-issue-of-no-sound-in-unity-webgl-after-watching-an-ad-and-returning-to-the-game-screen/23354)
**Author:** [@tony020409](https://qa.fmod.com/u/tony020409)\ **Replies:** 1\ **Last updated:** [September 23, 2025, 1:10am UTC](https://qa.fmod.com/t/the-issue-of-no-sound-in-unity-webgl-after-watching-an-ad-and-returning-to-the-game-screen/23354 "2025-09-23T01:10:10Z")
Hello everyone~ I have a question to ask. Currently, I’m developing a game using Unity WebGL, which will be embedded in an iOS app. There’s an issue where no sound is played. I know this is due to the autoplay policy, so… --- ## [iOS sounds not working after watching an ad in Safari](https://qa.fmod.com/t/ios-sounds-not-working-after-watching-an-ad-in-safari/22974)
**Author:** [@janne-hmp](https://qa.fmod.com/u/janne-hmp)\ **Replies:** 5\ **Last updated:** [August 6, 2025, 10:40pm UTC](https://qa.fmod.com/t/ios-sounds-not-working-after-watching-an-ad-in-safari/22974 "2025-08-06T22:40:20Z")
We are developing a game called GnollHack, which uses FMOD as sound middleware. What I’m going to describe is probably some sort of an iOS system problem, but I thought that I ask here just in case someone knows a workar… --- ## [Event callbacks don't work if other audio is playing on iOS](https://qa.fmod.com/t/event-callbacks-dont-work-if-other-audio-is-playing-on-ios/22465)
**Author:** [@NickBack](https://qa.fmod.com/u/NickBack)\ **Replies:** 8\ **Last updated:** [August 4, 2025, 10:01am UTC](https://qa.fmod.com/t/event-callbacks-dont-work-if-other-audio-is-playing-on-ios/22465 "2025-08-04T10:01:17Z")
We have certain sequences in our mobile game that rely on an fmod event callback in order to proceed. This works well, even when we have the audio muted, since I guess the audio is virtualized and event callbacks are st… --- ## [\[FMOD Unity iOS\] No Sound After App Resume or Ad — Even After Upgrading to 2.02.28](https://qa.fmod.com/t/fmod-unity-ios-no-sound-after-app-resume-or-ad-even-after-upgrading-to-2-02-28/22836)
**Author:** [@SHANIKTK](https://qa.fmod.com/u/SHANIKTK)\ **Replies:** 7\ **Last updated:** [May 15, 2025, 5:30am UTC](https://qa.fmod.com/t/fmod-unity-ios-no-sound-after-app-resume-or-ad-even-after-upgrading-to-2-02-28/22836 "2025-05-15T05:30:52Z")
Hey all, I’m posting this to share an ongoing iOS audio issue with FMOD in Unity that’s still unresolved even after upgrading to the latest FMOD version (as of writing). :bullseye: The Core Issue On iOS, audio completel… --- ## [\[iOS\] Problems with mixerSuspend and mixerResume](https://qa.fmod.com/t/ios-problems-with-mixersuspend-and-mixerresume/22820)
**Author:** [@rhdr](https://qa.fmod.com/u/rhdr)\ **Replies:** 2\ **Last updated:** [April 24, 2025, 6:44am UTC](https://qa.fmod.com/t/ios-problems-with-mixersuspend-and-mixerresume/22820 "2025-04-24T06:44:41Z")
Using fmod 2.03.07. Calling mixerSuspend() when the app goes to the background sometimes shows an error in the logs, Cannot offline render audio queue. (err: -50). With or without that error, when the app comes back to… --- ## [Sound callbacks in iOS background mode](https://qa.fmod.com/t/sound-callbacks-in-ios-background-mode/20256)
**Author:** [@andy55](https://qa.fmod.com/u/andy55)\ **Replies:** 9\ **Last updated:** [June 20, 2023, 1:21pm UTC](https://qa.fmod.com/t/sound-callbacks-in-ios-background-mode/20256 "2023-06-20T13:21:36Z")
Hi warriors, iOS background audio going nicely here under Unity, but I need a trigger to start the next audio track when the current track completes. Normally, there is setCallback() + FMOD\_CHANNELCONTROL\_CALLBACK\_END,… --- ## [\[Noob Question\] Vertical Sound Directionality Issue in Resonance Audio](https://qa.fmod.com/t/noob-question-vertical-sound-directionality-issue-in-resonance-audio/22373)
**Author:** [@chenyutpe](https://qa.fmod.com/u/chenyutpe)\ **Replies:** 2\ **Last updated:** [December 17, 2024, 4:42am UTC](https://qa.fmod.com/t/noob-question-vertical-sound-directionality-issue-in-resonance-audio/22373 "2024-12-17T04:42:51Z")
Hi, I’m developing an iOS game in Unity using Resonance Audio, and I’m experiencing a challenge with sound directionality, particularly for vertical sound sources. When I place sound sources (like birdsong) vertically a… --- ## [Dissonance disables FMOD sounds on iOS](https://qa.fmod.com/t/dissonance-disables-fmod-sounds-on-ios/22372)
**Author:** [@Owlipip](https://qa.fmod.com/u/Owlipip)\ **Replies:** 1\ **Last updated:** [December 8, 2024, 11:41pm UTC](https://qa.fmod.com/t/dissonance-disables-fmod-sounds-on-ios/22372 "2024-12-08T23:41:02Z")
When you turn on Dissonance voice chat on the iOS build, all FMOD sounds disappear, while there are a lot of “ERR\_CHANNEL\_STOLEN” errors. It is fixed only by restarting the build. Everything works fine in the android bui… --- ## [IOS CRASH ON STARTUP unity: 2022.3.50f1 fmod: 02.02.23](https://qa.fmod.com/t/ios-crash-on-startup-unity-2022-3-50f1-fmod-02-02-23/22223)
**Author:** [@baturalpcetin](https://qa.fmod.com/u/baturalpcetin)\ **Replies:** 2\ **Last updated:** [November 5, 2024, 1:48pm UTC](https://qa.fmod.com/t/ios-crash-on-startup-unity-2022-3-50f1-fmod-02-02-23/22223 "2024-11-05T13:48:36Z")
I write the entire log that falls into firebase. We are sure that the error is caused by fmod, what do we need to do to solve it? Crashed: com.Metal.DeviceDispatchQueue EXC\_BAD\_ACCESS KERN\_INVALID\_ADDRESS 0x00000000011… --- ## [FMOD has no sound on the HarmonyOS system](https://qa.fmod.com/t/fmod-has-no-sound-on-the-harmonyos-system/22125)
**Author:** [@chensheng990518](https://qa.fmod.com/u/chensheng990518)\ **Replies:** 5\ **Last updated:** [October 28, 2024, 4:54am UTC](https://qa.fmod.com/t/fmod-has-no-sound-on-the-harmonyos-system/22125 "2024-10-28T04:54:06Z")
Before my engine on Android can be used very well fmod,Recently I am ready to access the mobile phone HarmonyOS system,According to the official documents to make a special call to the HarmonyOS platform,Create fmod soun… --- ## [Can FMOD communicate with iOS haptics?](https://qa.fmod.com/t/can-fmod-communicate-with-ios-haptics/22057)
**Author:** [@jeshuaew](https://qa.fmod.com/u/jeshuaew)\ **Replies:** 1\ **Last updated:** [September 4, 2024, 4:06am UTC](https://qa.fmod.com/t/can-fmod-communicate-with-ios-haptics/22057 "2024-09-04T04:06:19Z")
I’ve recently joined a project in Unity. They are looking to add haptics to the game, shipping on iOS. Does FMOD have any support for iOS’ core haptics framework? I am just doing research on the subject now so learning … --- ## [Capturing stereo output from Fmod](https://qa.fmod.com/t/capturing-stereo-output-from-fmod/21888)
**Author:** [@spakment](https://qa.fmod.com/u/spakment)\ **Replies:** 5\ **Last updated:** [July 22, 2024, 12:40am UTC](https://qa.fmod.com/t/capturing-stereo-output-from-fmod/21888 "2024-07-22T00:40:18Z")
Hi all, I’m trying to capture Fmod’s output and pass it to a video recorder. I’ve based my code on the DSP Capture example. https://www.fmod.com/docs/2.02/unity/examples-dsp-capture.html The audio recorded on the vid… --- ## [Strong aliasing in 24 kHz mode](https://qa.fmod.com/t/strong-aliasing-in-24-khz-mode/21582)
**Author:** [@Insidewaves](https://qa.fmod.com/u/Insidewaves)\ **Replies:** 5\ **Last updated:** [July 2, 2024, 9:40am UTC](https://qa.fmod.com/t/strong-aliasing-in-24-khz-mode/21582 "2024-07-02T09:40:26Z")
Hi! I have an unexplained resampling problem. With a system frequency of 24 kHz on iOS and Android, there is irreparable aliasing. The useful signal from 8 to 12 kHz is reflected in frequencies from 12 to 18 kHz. I have… --- ## [Link additional apple frameworks](https://qa.fmod.com/t/link-additional-apple-frameworks/21784)
**Author:** [@danielrudrich](https://qa.fmod.com/u/danielrudrich)\ **Replies:** 3\ **Last updated:** [June 26, 2024, 3:08am UTC](https://qa.fmod.com/t/link-additional-apple-frameworks/21784 "2024-06-26T03:08:22Z")
Hi, is there a way to add Apple Frameworks (like Accelerate.framework) to be linked during iOS builds? I’ve tried adding Accelerate.framework to the Dynamic Plugins list in the FMOD Settings. However the list seems to … --- ## [After close and stop sound, FMOD failed to initialise again by "FMOD::System\_Create(&system)"](https://qa.fmod.com/t/after-close-and-stop-sound-fmod-failed-to-initialise-again-by-fmod-system-create-system/17519)
**Author:** [@surfmike](https://qa.fmod.com/u/surfmike)\ **Replies:** 9\ **Last updated:** [June 20, 2024, 11:44pm UTC](https://qa.fmod.com/t/after-close-and-stop-sound-fmod-failed-to-initialise-again-by-fmod-system-create-system/17519 "2024-06-20T23:44:28Z")
After close and stop sound when we quickly initialising FMOD again by using “FMOD::System\_Create(&system)”, it gives an error “FMOD\_ERR\_MEMORY”. Can you please look into this issue and let me know what is going wrong? T… --- ## [How to use FMOD\_WAVWRITER in Unity for Android/iOS platforms](https://qa.fmod.com/t/how-to-use-fmod-wavwriter-in-unity-for-android-ios-platforms/21646)
**Author:** [@RGLD\_O](https://qa.fmod.com/u/RGLD_O)\ **Replies:** 7\ **Last updated:** [June 12, 2024, 12:13am UTC](https://qa.fmod.com/t/how-to-use-fmod-wavwriter-in-unity-for-android-ios-platforms/21646 "2024-06-12T00:13:47Z")
I have been reading documentation and trying to understand the system, but I am still confused. I want to record the output of FMOD on Android and iOS devices so that, later on, the user can share the recording output. … --- ## [Packing FMOD Banks in Unreal](https://qa.fmod.com/t/packing-fmod-banks-in-unreal/21676)
**Author:** [@pigeon55](https://qa.fmod.com/u/pigeon55)\ **Replies:** 3\ **Last updated:** [June 6, 2024, 4:03am UTC](https://qa.fmod.com/t/packing-fmod-banks-in-unreal/21676 "2024-06-06T04:03:24Z")
Hello. I meet problem in packaged-unreal project with ios platform. After changed some fmod event and rebuild fmod bank, we made a patch and hot fix project but the new change not work in ios platform. Does this prob… --- ## [Banks list on mobile is empty](https://qa.fmod.com/t/banks-list-on-mobile-is-empty/21587)
**Author:** [@Oct-DanaFrenklach](https://qa.fmod.com/u/Oct-DanaFrenklach)\ **Replies:** 1\ **Last updated:** [May 8, 2024, 5:49am UTC](https://qa.fmod.com/t/banks-list-on-mobile-is-empty/21587 "2024-05-08T05:49:41Z")
Hello :slight\_smile: Recently we’ve been working on our asset bundle flow, and after everything was ready we turned the FMOD import settings back to load from StreamingAssets. Since then, banks aren’t loaded on mobile,… --- ## [iOS output sound through speakers or headphones, while using microphone input](https://qa.fmod.com/t/ios-output-sound-through-speakers-or-headphones-while-using-microphone-input/21543)
**Author:** [@lingolooper](https://qa.fmod.com/u/lingolooper)\ **Replies:** 3\ **Last updated:** [April 29, 2024, 1:27am UTC](https://qa.fmod.com/t/ios-output-sound-through-speakers-or-headphones-while-using-microphone-input/21543 "2024-04-29T01:27:17Z")
Hi there! I just pretty much finished migrating all the audio of my Unity game to FMOD, and now I’m running into an issue with iOS that I don’t know how to solve. Some context: the game makes heavy use of voice input. … --- ## [In iOS, how to merge audio and export it to a sandbox file](https://qa.fmod.com/t/in-ios-how-to-merge-audio-and-export-it-to-a-sandbox-file/21491)
**Author:** [@magic\_geng](https://qa.fmod.com/u/magic_geng)\ **Replies:** 1\ **Last updated:** [April 16, 2024, 1:15am UTC](https://qa.fmod.com/t/in-ios-how-to-merge-audio-and-export-it-to-a-sandbox-file/21491 "2024-04-16T01:15:37Z")
int play\_start(FPlayer \*play, char \*names,int length) { int err = 0; for (int i =0; i \< length; i ++) { err = FMOD\_System\_CreateStream(play-\>system,names\[i\], FMOD\_DEFAULT, 0, &play-\>sounds\[i\]); if(err!=0) retu… --- ## [Low Latency Microphone Input and DSP](https://qa.fmod.com/t/low-latency-microphone-input-and-dsp/21377)
**Author:** [@aspenebucky25](https://qa.fmod.com/u/aspenebucky25)\ **Replies:** 2\ **Last updated:** [March 19, 2024, 9:20pm UTC](https://qa.fmod.com/t/low-latency-microphone-input-and-dsp/21377 "2024-03-19T21:20:39Z")
I’ve tried a lot of different approaches and am hitting some dead ends! I’m developing low latency pitch detection for a Unity application for iOS devices. Is it possible to get low latency input from the microphone usi… --- ## [FMOD 2.02.xx Unity and DSP Buffer Settings vs System::setDSPBufferSize](https://qa.fmod.com/t/fmod-2-02-xx-unity-and-dsp-buffer-settings-vs-system-setdspbuffersize/21329)
**Author:** [@millertone](https://qa.fmod.com/u/millertone)\ **Replies:** 1\ **Last updated:** [March 8, 2024, 12:51am UTC](https://qa.fmod.com/t/fmod-2-02-xx-unity-and-dsp-buffer-settings-vs-system-setdspbuffersize/21329 "2024-03-08T00:51:42Z")
Hi Folks, There’s been a few informative posts regarding buffer settings using System::setDSPBufferSize, and I’m wondering if that method has been usurped by the DSP Buffer Settings available via Unity \> FMOD \> FMOD Set… --- ## [AVAudioSessionInterruption WasSuspendedKey is deprecated warning FMOD for Unreal 2.0.2.20 for iOS](https://qa.fmod.com/t/avaudiosessioninterruption-wassuspendedkey-is-deprecated-warning-fmod-for-unreal-2-0-2-20-for-ios/21148)
**Author:** [@davaidev](https://qa.fmod.com/u/davaidev)\ **Replies:** 1\ **Last updated:** [January 30, 2024, 11:27pm UTC](https://qa.fmod.com/t/avaudiosessioninterruption-wassuspendedkey-is-deprecated-warning-fmod-for-unreal-2-0-2-20-for-ios/21148 "2024-01-30T23:27:20Z")
Hi guys, I have Xcode 15.2 + MacOS Sonoma 14.2.1 + iPhone SDK 17.2 + Apple M3 chip When I build my project with FMOD for Unreal 2.0.2.20 for iPhone 15 Pro iOS 17.2.1 on have a warning: \[698/733\] Compile \[arm64\] FMODSt… --- ## [Some sounds are playing in the editor, but not on mobile](https://qa.fmod.com/t/some-sounds-are-playing-in-the-editor-but-not-on-mobile/21091)
**Author:** [@Oct-DanaFrenklach](https://qa.fmod.com/u/Oct-DanaFrenklach)\ **Replies:** 1\ **Last updated:** [January 16, 2024, 4:28am UTC](https://qa.fmod.com/t/some-sounds-are-playing-in-the-editor-but-not-on-mobile/21091 "2024-01-16T04:28:34Z")
Hello :slight\_smile: We’re working on a mobile game and have been using FMOD for quite some time, and haven’t encountered that type of thing before. We’ve implemented some sounds in the lobby scene, and in the editor a… [Next page](https://qa.fmod.com/tag/ios/4.md?match_all_tags=true&page=1&tags%5B%5D=ios)