Audio - Mobile lag with multiple sounds

Hey,

I have a sound which I play about 20 times in a row in quick succession (as level widgets pop up on a level selection screen).

On the PC this works fine.

On the mobile, each sound seems to hit the phone and cause a huge amounts of lag.

I’ve tried playing the sound both through the animation timeline and through blueprints using Play Sound, both offer the same level of performance. I’ve tried setting the concurrency settings so the max count is 2, but that doesn’t seem to offer any better performance either.

Weirdly, this only seems to occur with this one sound. When I use others, the lag goes away. The sounds are almost identical in length and size

This is on a Samsung S8 using UE4 16.3

Any ideas what this could be?

Cheers,
Chris

I finally figured out the problem.

My sounds were exporting at a 48mhz sample rate. My old sounds were at a 44mhz sample rate.

Any sounds that are playing at a 44mhz sample rate are fine, and I could layer as many as I wanted on top of each other. Any sounds that I brought in at a 48mhz sample rate, when played on top of one another in quick succession, would bring the game to a halt for a second or two.

I know this is a necro-post but I just wanted to say thank you for coming back here and posting your solution, you just helped me figure out my issue on a project.