# Multiple FMOD core issues found while building a codec plugin **URL:** \ **Category:** FMOD Engine\ **Created:** [September 27, 2026, 6:12pm UTC](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535 "2026-09-27T18:12:57Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![andy55](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/andy55/32/5016_2.png) [@andy55](https://qa.fmod.com/u/andy55)\ **Post date:** [September 27, 2026, 6:12pm UTC](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535/1 "2026-09-27T18:12:57Z")
Gday FMOD team, Senior dev at [SoundSpectrum](https://soundspectrum.com) 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](https://qa.fmod.com/t/netstream-with-aac-48-kbits/11913) to the codec plugin API for AAC streams. We built on it and it works, HTTP streams included, so thank you and looking forward to shipping the numbers to graduate to a FMOD customer. Along the way I isolated 5 issues that are worth raising to the FMOD team (using FMOD 2.03.14, macOS 14 on Apple Silicon; 1–4 also on 2.02.25): 1. `System::release` or `System::close` crashes (SIGSEGV) while a non-blocking HTTP open is BUFFERING; while it’s CONNECTING, neither does 2. Passing 5 as `nonblockthreadid` (correctly) returns FMOD\_ERR\_INVALID\_PARAM, but passing −1 returns FMOD\_OK and then crashes. 3. `Channel::setPosition` on an HTTP stream without Range support returns FMOD\_OK; the stream then fails (FMOD\_ERR\_FILE\_COULDNOTSEEK), but the channel stays “playing”, silent _ **permanently** _. 4. An HTTP body cut short of its Content-Length raises no error or starving flag (playback loops the receive buffer to the declared length) 5. The macOS SDK’s API dylibs are _ **signed but not notarized** _ (though its tools are), so Gatekeeper blocks it. My investigation and write-ups were AI-assisted and I’ve worked hard to set y’all up for success (logs, evidence, repros). How would you like them: one topic per issue or please lmk what you prefer. It’d be great for our player to show FMOD at its best. Best, Andy ---
**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\ **Post date:** [September 28, 2026, 2:06am UTC](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535/2 "2026-09-28T02:06:23Z")
Hi, Thank you for bringing this to our attention and putting all the evidence together. It can all be zipped and uploaded to your [profile](https://www.fmod.com/profile#uploads). I will attempt to reproduce the issue and get back to you if I need anymore info. Hopefully we can get these sorted for your release! ---
**Author:** ![andy55](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/andy55/32/5016_2.png) [@andy55](https://qa.fmod.com/u/andy55)\ **Post date:** [September 28, 2026, 4:49pm UTC](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535/3 "2026-09-28T16:49:17Z")
Great, all set: uploaded fmod-core-issues-2.03.14.zip ---
**Author:** ![Connor\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/connor_fmod/32/3685_2.png) [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)\ **Post date:** [September 30, 2026, 5:42am UTC](https://qa.fmod.com/t/multiple-fmod-core-issues-found-while-building-a-codec-plugin/24535/4 "2026-09-30T05:42:52Z")
Thank you for uploading that. We greatly appreciate the effort you have put into putting this bug report together. So far I have been able to reproduce the first issue! I have created a task to investigate it further. I will continue working on the other issues as well.