# FMOD Engine **URL:** https://qa.fmod.com/c/fmodapi/6.md [Latest](https://qa.fmod.com/latest.md) · [Categories](https://qa.fmod.com/categories.md) · [Tags](https://qa.fmod.com/tags.md) --- ## [Multiple FMOD core issues found while building a codec plugin](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535)
**Author:** [@andy55](https://qa.fmod.com/u/andy55)\ **Replies:** 3\ **Last updated:** [September 30, 2026, 5:42am UTC](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535 "2026-09-30T05:42:52Z")
Gday FMOD team, Senior dev at SoundSpectrum here. We’ve been selling music visualizers to AV fans for 25+ years, and our new Unity-based audio player (built on FMOD Core) is nearing beta. Years ago, Mathew pointed me t… --- ## [3rd party plugin dev and target project integration](https://qa.fmod.com/t/3rd-party-plugin-dev-and-target-project-integration/24522)
**Author:** [@Dannthr](https://qa.fmod.com/u/Dannthr)\ **Replies:** 3\ **Last updated:** [September 28, 2026, 8:18am UTC](https://qa.fmod.com/t/3rd-party-plugin-dev-and-target-project-integration/24522 "2026-09-28T08:18:13Z")
Hey fam, I’m looking for a best practice here. I just completed testing of my FMOD effect plugin by deploying a test UE5 project on Windows, Mac, Android, and iOS. Implementing 3rd party library files into the FMOD Stud… --- ## [BadImageFormatException](https://qa.fmod.com/t/badimageformatexception/24523)
**Author:** [@Hyp-X](https://qa.fmod.com/u/Hyp-X)\ **Replies:** 3\ **Last updated:** [September 24, 2026, 12:15am UTC](https://qa.fmod.com/t/badimageformatexception/24523 "2026-09-24T00:15:04Z")
Hi, I’m using the C# API from fmodstudioapi20314win-installer.exe The application is 64-bit / Windows. Debug version works fine loading fmodstudioL.dll and fmodL.dll Release version fails to load fmodstudio.dll with: … --- ## [Godot 4 and FMOD integration - Best practice?](https://qa.fmod.com/t/godot-4-and-fmod-integration-best-practice/20869)
**Author:** [@pintseeker](https://qa.fmod.com/u/pintseeker)\ **Replies:** 155\ **Last updated:** [September 23, 2026, 1:07pm UTC](https://qa.fmod.com/t/godot-4-and-fmod-integration-best-practice/20869 "2026-09-23T13:07:12Z")
Hello everyone, I learned FMOD while working as a part of a team that used Unity. I started developing as a solo dev using Godot. The last post regarding this was in 2022, I thought there may be new information since th… --- ## [\[iOS\] 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… --- ## [Custom FMOD DSP Plugin Triggers Smart App Control](https://qa.fmod.com/t/custom-fmod-dsp-plugin-triggers-smart-app-control/24506)
**Author:** [@nanocumert](https://qa.fmod.com/u/nanocumert)\ **Replies:** 1\ **Last updated:** [September 9, 2026, 11:02pm UTC](https://qa.fmod.com/t/custom-fmod-dsp-plugin-triggers-smart-app-control/24506 "2026-09-09T23:02:45Z")
Hello, I built a custom dsp plugin with llm that blends small intervals of recorded audio with hann window to create seamless rpm engine sound transitions for my car game without any need for advanced configuration (jus… --- ## [Crash in mixerSuspend](https://qa.fmod.com/t/crash-in-mixersuspend/24471)
**Author:** [@marko.ravnjak](https://qa.fmod.com/u/marko.ravnjak)\ **Replies:** 10\ **Last updated:** [September 7, 2026, 11:11am UTC](https://qa.fmod.com/t/crash-in-mixersuspend/24471 "2026-09-07T11:11:34Z")
We encountered an Android ARM64 crash inside the FMOD mixer thread while calling System::mixerSuspend(). The complete FMOD logging-library output is available and will be attached. Environment: FMOD Engine: 2.03.14 FM… --- ## [Streaming and Latency](https://qa.fmod.com/t/streaming-and-latency/24467)
**Author:** [@zanhulme](https://qa.fmod.com/u/zanhulme)\ **Replies:** 3\ **Last updated:** [September 7, 2026, 4:13am UTC](https://qa.fmod.com/t/streaming-and-latency/24467 "2026-09-07T04:13:17Z")
Hello! It has generally been my understanding that for sounds that require precision timing and minimal latency, the Stream load setting is best avoided. However, I have some questions about the details of streaming la… --- ## [Emscripten 6.0.2 with Fmod Pthreads not creating threads](https://qa.fmod.com/t/emscripten-6-0-2-with-fmod-pthreads-not-creating-threads/24420)
**Author:** [@sbehnke-zynga](https://qa.fmod.com/u/sbehnke-zynga)\ **Replies:** 7\ **Last updated:** [September 2, 2026, 11:47pm UTC](https://qa.fmod.com/t/emscripten-6-0-2-with-fmod-pthreads-not-creating-threads/24420 "2026-09-02T23:47:26Z")
I’m using: FMOD Engine 2.03.14 html5/wasm fmodP/fmodPL (w32) libs, linked into an emscripten 6.0.2 C/C++ project. Cross-origin isolation is working (crossOriginIsolated === true, SAB available); the AudioWorklet mixer … --- ## [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 … --- ## [Track silent after parameter-triggered transition with transition timeline - regression between 2.02.25 and 2.02.34](https://qa.fmod.com/t/track-silent-after-parameter-triggered-transition-with-transition-timeline-regression-between-2-02-25-and-2-02-34/24479)
**Author:** [@JayOrbaum](https://qa.fmod.com/u/JayOrbaum)\ **Replies:** 1\ **Last updated:** [August 25, 2026, 12:33am UTC](https://qa.fmod.com/t/track-silent-after-parameter-triggered-transition-with-transition-timeline-regression-between-2-02-25-and-2-02-34/24479 "2026-08-25T00:33:50Z")
We have a 2D timeline event (a musical theatre song) where a parameter-triggered transition with a transition timeline leaves one track silent after the transition completes - on 2.02.34, but not on 2.02.25. Setup A … --- ## [Plugin UI - DIfferent dial sizes in .plugin.js descriptions](https://qa.fmod.com/t/plugin-ui-different-dial-sizes-in-plugin-js-descriptions/24441)
**Author:** [@horacv1](https://qa.fmod.com/u/horacv1)\ **Replies:** 1\ **Last updated:** [August 13, 2026, 7:25am UTC](https://qa.fmod.com/t/plugin-ui-different-dial-sizes-in-plugin-js-descriptions/24441 "2026-08-13T07:25:45Z")
Hey everyone! Does anyone know if there’s a way to get different dial sizes in a plugin’s UI? Ideally I’d love to be able to pick between at least two sizes, Medium and Small. I’ve tried messing with size policies, str… --- ## [FMOD Engine 2.02.16 PDB Files (Windows)](https://qa.fmod.com/t/fmod-engine-2-02-16-pdb-files-windows/24451)
**Author:** [@kateward](https://qa.fmod.com/u/kateward)\ **Replies:** 2\ **Last updated:** [August 4, 2026, 5:53am UTC](https://qa.fmod.com/t/fmod-engine-2-02-16-pdb-files-windows/24451 "2026-08-04T05:53:53Z")
Heya! Could I please have the 32bit and 64bit FMod Engine 2.02.16 (Windows) PDB files for the following files; fmod.pdb fmodL.pdb fmodstudio.pdb fmodstudioL.pdb Thanks ^w^ --- ## [PS5 Deadlock Between Main Thread and FMOD Studio Update Thread Causing Game Freeze](https://qa.fmod.com/t/ps5-deadlock-between-main-thread-and-fmod-studio-update-thread-causing-game-freeze/24414)
**Author:** [@s.vieshniakov](https://qa.fmod.com/u/s.vieshniakov)\ **Replies:** 6\ **Last updated:** [August 3, 2026, 10:59am UTC](https://qa.fmod.com/t/ps5-deadlock-between-main-thread-and-fmod-studio-update-thread-causing-game-freeze/24414 "2026-08-03T10:59:35Z")
Hi, We’ve encountered a deadlock issue on PS5 when using FMOD Studio. The game completely freezes because two threads are waiting on each other while holding FMOD critical sections. The issue has only been reproduced o… --- ## [HTML5/WASM — no way to supply a bank encryption key via Studio::System::setAdvancedSettings (intended limitation?](https://qa.fmod.com/t/html5-wasm-no-way-to-supply-a-bank-encryption-key-via-studio-setadvancedsettings-intended-limitation/24424)
**Author:** [@Falconshield](https://qa.fmod.com/u/Falconshield)\ **Replies:** 2\ **Last updated:** [July 27, 2026, 5:20pm UTC](https://qa.fmod.com/t/html5-wasm-no-way-to-supply-a-bank-encryption-key-via-studio-setadvancedsettings-intended-limitation/24424 "2026-07-27T17:20:25Z")
I’m developing a web app with the help of Claude. Fmod is the core engine, and html is the front end. I set a Bank Encryption Key in FMOD Studio (Preferences \> Build) and rebuilt all banks. After that, no bank will play… --- ## [Capture only a dynamic subset of channels' mixed audio in real-time (side-chain capture DSP)?](https://qa.fmod.com/t/capture-only-a-dynamic-subset-of-channels-mixed-audio-in-real-time-side-chain-capture-dsp/24366)
**Author:** [@Cappie](https://qa.fmod.com/u/Cappie)\ **Replies:** 5\ **Last updated:** [July 17, 2026, 4:46am UTC](https://qa.fmod.com/t/capture-only-a-dynamic-subset-of-channels-mixed-audio-in-real-time-side-chain-capture-dsp/24366 "2026-07-17T04:46:36Z")
I have many sounds playing on channels under the master ChannelGroup. At runtime I want to capture only a specific subset of those channels’ mixed audio as a separate real-time PCM stream (to drive a secondary output), w… --- ## [FMOD Localization, keys reset everytime the project is opened](https://qa.fmod.com/t/fmod-localization-keys-reset-everytime-the-project-is-opened/24392)
**Author:** [@awesreek](https://qa.fmod.com/u/awesreek)\ **Replies:** 1\ **Last updated:** [July 15, 2026, 7:13am UTC](https://qa.fmod.com/t/fmod-localization-keys-reset-everytime-the-project-is-opened/24392 "2026-07-15T07:13:29Z")
Howdy! So we’ve been using FMOD to handle the audio side of the equation, and, with that, we’ve most recently undertaken the task of adding localization to our game. For this task, we’ve been using localized audio table… --- ## [Better tutorials for the engine API?](https://qa.fmod.com/t/better-tutorials-for-the-engine-api/24384)
**Author:** [@DavidJRIP](https://qa.fmod.com/u/DavidJRIP)\ **Replies:** 1\ **Last updated:** [July 7, 2026, 7:06am UTC](https://qa.fmod.com/t/better-tutorials-for-the-engine-api/24384 "2026-07-07T07:06:18Z")
My title says it succinctly. Is there anywhere where the API tutorial gives more clear advice on how to create a simple instrument plugin? Currently working out how to create a simple osc instrument with volume and hz pa… --- ## [User-created sounds not playing in FMOD with pthreads](https://qa.fmod.com/t/user-created-sounds-not-playing-in-fmod-with-pthreads/24359)
**Author:** [@rhys-L](https://qa.fmod.com/u/rhys-L)\ **Replies:** 1\ **Last updated:** [July 2, 2026, 6:19am UTC](https://qa.fmod.com/t/user-created-sounds-not-playing-in-fmod-with-pthreads/24359 "2026-07-02T06:19:41Z")
I’m trying to set up the pthread-enabled wasm port. Everything seems alright, except sounds that are played by programmer sounds are silent. Swapping fmodstudioPL.js with fmodstudioL.js makes all sounds audible. All sou… --- ## [Low frequency sound audio distortion bug?](https://qa.fmod.com/t/low-frequency-sound-audio-distortion-bug/22614)
**Author:** [@kiberptah](https://qa.fmod.com/u/kiberptah)\ **Replies:** 8\ **Last updated:** [July 1, 2026, 10:31pm UTC](https://qa.fmod.com/t/low-frequency-sound-audio-distortion-bug/22614 "2026-07-01T22:31:41Z")
Noticed that my ambient loop produces strange audio distortion when played in Studio or in-game. It is definitely not in the audio file and it is also not heard in the “sound” window preview. The second file is the same … --- ## [Effect bypass automation function plans?](https://qa.fmod.com/t/effect-bypass-automation-function-plans/17662)
**Author:** [@FishEyes95](https://qa.fmod.com/u/FishEyes95)\ **Replies:** 16\ **Last updated:** [June 23, 2026, 1:31am UTC](https://qa.fmod.com/t/effect-bypass-automation-function-plans/17662 "2026-06-23T01:31:40Z")
Hi there! I was just wondering if there was any plans to introduce a bypass function that can be automated in your events in the near future? I think this would be a great addition that many people would appreciate and… --- ## [Is it possible to copy data for master track on FMOD v2.02.22?](https://qa.fmod.com/t/is-it-possible-to-copy-data-for-master-track-on-fmod-v2-02-22/24323)
**Author:** [@Hellman\_X](https://qa.fmod.com/u/Hellman_X)\ **Replies:** 1\ **Last updated:** [June 22, 2026, 7:33am UTC](https://qa.fmod.com/t/is-it-possible-to-copy-data-for-master-track-on-fmod-v2-02-22/24323 "2026-06-22T07:33:18Z")
Currently, I’m in FMOD v2.02.22. In my script, I’m attempting to import any tracks that have the name “BRP” in them to a new project that is identical to the old one, basically a copy and paste, it works great, but I’m … --- ## [Acess to FMOD Ex SDK 4.44.64](https://qa.fmod.com/t/acess-to-fmod-ex-sdk-4-44-64/24346)
**Author:** [@rugg8](https://qa.fmod.com/u/rugg8)\ **Replies:** 1\ **Last updated:** [June 19, 2026, 2:17am UTC](https://qa.fmod.com/t/acess-to-fmod-ex-sdk-4-44-64/24346 "2026-06-19T02:17:33Z")
Hello FMOD Team, We are maintaining a legacy game project based on an older C++ engine that currently uses FMOD Ex. We are migrating the Windows Game Client from Win32 to x64 and require access to the FMOD Ex 4.44.64… --- ## [Recommended method for rendering FMOD Studio event waveforms](https://qa.fmod.com/t/recommended-method-for-rendering-fmod-studio-event-waveforms/24328)
**Author:** [@d3vi1i5hv0id](https://qa.fmod.com/u/d3vi1i5hv0id)\ **Replies:** 1\ **Last updated:** [June 15, 2026, 6:57am UTC](https://qa.fmod.com/t/recommended-method-for-rendering-fmod-studio-event-waveforms/24328 "2026-06-15T06:57:04Z")
Hello, I’m currently working on the Godot 4.5 source code, making a custom FMOD engine module. The rest of the integration is unimportant in its implementation, but I am currently dealing with rendering a waveform of St… --- ## [Understanding the size of the bank vs size of samples in RAM](https://qa.fmod.com/t/understanding-the-size-of-the-bank-vs-size-of-samples-in-ram/24251)
**Author:** [@sidebail](https://qa.fmod.com/u/sidebail)\ **Replies:** 2\ **Last updated:** [June 10, 2026, 6:00pm UTC](https://qa.fmod.com/t/understanding-the-size-of-the-bank-vs-size-of-samples-in-ram/24251 "2026-06-10T18:00:27Z")
Hello! It’s this time of the year where we hit some memory allocation crashes in FMOD and jumped the rabbit hole of profiler and fixes. So, as I’m investigating the memory usage that’s allocated we’ve stumbled upon a que… --- ## [\[Bug\]\[2.02.06\] Android startup crash](https://qa.fmod.com/t/bug-2-02-06-android-startup-crash/18789)
**Author:** [@iwandi](https://qa.fmod.com/u/iwandi)\ **Replies:** 58\ **Last updated:** [June 9, 2026, 2:55am UTC](https://qa.fmod.com/t/bug-2-02-06-android-startup-crash/18789 "2026-06-09T02:55:32Z")
Build in Unity 2021.2.15f1. Right after app start we get this CRASH: 2022-05-23 16:43:56.063 18138-18138/\*\*\*\*\* E/.FMOD.OutputAAudioHeadphonesChanged() (tried Java\_org\_fmod\_FMOD\_OutputAAudioHeadphonesChanged and Java\_or… --- ## [Is it possible to modify MIDI's Instrument while playing MIDI, so that it dynamically loads other Instruments in DLS](https://qa.fmod.com/t/is-it-possible-to-modify-midis-instrument-while-playing-midi-so-that-it-dynamically-loads-other-instruments-in-dls/24296)
**Author:** [@Reikos](https://qa.fmod.com/u/Reikos)\ **Replies:** 1\ **Last updated:** [June 5, 2026, 4:54am UTC](https://qa.fmod.com/t/is-it-possible-to-modify-midis-instrument-while-playing-midi-so-that-it-dynamically-loads-other-instruments-in-dls/24296 "2026-06-05T04:54:20Z")
Perhaps it should be setMusicChanneInstrument? At present, I have only thought of two ways: one is to regenerate a new MIDI file for the Instrument, and the other is to divide the DLs into one Instrument corresponding to… --- ## [Loading MP3 files causes sharp 16khz low pass cut](https://qa.fmod.com/t/loading-mp3-files-causes-sharp-16khz-low-pass-cut/24254)
**Author:** [@basiltornado](https://qa.fmod.com/u/basiltornado)\ **Replies:** 4\ **Last updated:** [May 27, 2026, 6:17am UTC](https://qa.fmod.com/t/loading-mp3-files-causes-sharp-16khz-low-pass-cut/24254 "2026-05-27T06:17:08Z")
(Example image, top is original MP3 and bottom is Wavwriter, output at 96khz to remove resampling artifacts. Note that occasionally it lets through the blocked frequencies, but at reduced quality, almost like it’s bee… --- ## [Thread crash in FMOD::SystemI::updateStreams](https://qa.fmod.com/t/thread-crash-in-fmod-updatestreams/24265)
**Author:** [@elesh](https://qa.fmod.com/u/elesh)\ **Replies:** 5\ **Last updated:** [May 19, 2026, 4:01pm UTC](https://qa.fmod.com/t/thread-crash-in-fmod-updatestreams/24265 "2026-05-19T16:01:32Z")
I’m working with an old windows product experiencing stalls when releasing sounds. I’ve switched to delayed releasing of sound sources until they are either in a ready or error state as suggested in the documentation. Ho… --- ## [Android 3D spatialisation + DSP processing](https://qa.fmod.com/t/android-3d-spatialisation-dsp-processing/24238)
**Author:** [@joshechoes](https://qa.fmod.com/u/joshechoes)\ **Replies:** 3\ **Last updated:** [May 19, 2026, 5:24am UTC](https://qa.fmod.com/t/android-3d-spatialisation-dsp-processing/24238 "2026-05-19T05:24:43Z")
Spatialisation with android + head tracking on Pixel Pro devices with Pixel Buds Pro is working (plus a bunch of other headphones that support head tracking, e.g. Redmi Buds Pro, SHOKZ OpenFit Pro etc.). It head tracks a… [Next page](https://qa.fmod.com/c/fmodapi/6.md?page=1)