# iOS sounds not working after watching an ad in Safari **URL:** \ **Category:** FMOD Engine\ **Tags:** ios, csharp\ **Created:** [May 25, 2025, 6:07pm UTC](https://qa.fmod.com/t/ios-sounds-not-working-after-watching-an-ad-in-safari/22974 "2025-05-25T18:07:40Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [May 27, 2025, 4:17am UTC](https://qa.fmod.com/t/ios-sounds-not-working-after-watching-an-ad-in-safari/22974/2 "2025-05-27T04:17:29Z")
Hi, Thank you for sharing the detailed information. > [@janne-hmp](#): > > Any ideas how to force the audio to be audible immediately after watching ads in Safari would be appreciated. This is a problem only with iOS and only if I watch first ads in a browser (another app like Safari or Chrome) that contain video and sound immediately prior to starting the game. This problem appears on all iOS devices we have tested. This sounds similar to an issue discussed here: > [@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/22465/4): > > Thanks for the video demonstrating the issue, and for testing the repro for it so thoroughly yourself! I’ve done a bit of a deep dive into it, and the issue is due to other applications using a larger buffer size for audio than FMOD. FMOD uses what is half the usual buffer on iOS to provide audio with lower latency (512 samples in FMOD for Unity settings → Platform Specific → DSP Buffer Settings → DSP Buffer Length). When FMOD audio is suspended in favor of other applications, the buffer than i… I’d recommend giving it a read to see if any of the suggestions apply to your case. Hope this helps! --- _[View the full topic](https://qa.fmod.com/t/ios-sounds-not-working-after-watching-an-ad-in-safari/22974)._