webaudio pause/resume/seek

I have an endlessly looping sample and would like to jump to different
positions within it to randomize the output.

currently I believe this is what is expected for every jump:
I must stop the current AudioBufferSourceNode
I must create a new AudioBufferSourceNode and start at my desired position

maybe there is a better approach? what I am doing seems rather
wasteful/complicated.

I have the same issue for audio I need to pause/resume, as I cant find a
way to continue playing at a desired position.

my current implementation for pause/resume is to simply turn volume to 0
and back. I had implemented it setting/getting AudioContext.currentTime,
but I only just noticed that this property is readonly in the specs.
my jumping implementation fails badly and seems to stack up more and more
samples
I could post some code if desired, but decided against bloating the question

best wishes, marc