Understanding PulseSimple Large Memory Allocations

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I'm on an Ubuntu system and want to write to a PCM buffer and play it.
I created the most basic C program that only calls pa_simple_new().
I launched this program into Intel VTune and performed a Memory Consumption analysis. It showed that libpulsecommon.so allocates ~200MB and pa_simple_new() allocates ~67MB.
Why is so much memory allocated?
Also, as pulseaudio is what is adopted by Ubuntu, is it true that I have no other choice than to use pulseaudio as it owns all the sound devices?
Ryan McClue, Sydney

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