AudioKernel

[wanton lotus]

Is this coming from the profiler? This is a bit of an educated guess but it would be memory allocations specifically related to the DSP (digital signal processing).

Since it's coming from the graph I would assume it's coming from the mixer as it puts together audio, plus and effects added (such as reverb).

[deft kelp]

I'm just studying Jobs, when you create a NativeContainer, you need to specify allocation type (https://docs.unity3d.com/Manual/JobSystemNativeContainer.html#:~:text=first NativeArray.-,Memory allocators,-When you create)
which is Allocator.something
https://docs.unity3d.com/ScriptReference/Unity.Collections.Allocator.html
here is the list of all Allocator.somethings available. The only one that doesn't make sence to me is the Allocator.AudioKernel