Improve Latency

[gabcoh]

In pipesource-mvp there is a huge amount of latency. This is probably due in part to both denoiser and maybe something in pipesource app itself. Need to do more investigation to see if anything is coming from pipesource, but on the denoiser end here are some ideas to improve latency:

• use prefilled audio buffer like in example python
• always spew everything no matter what by zero padding

I'll add more info to this issue if I find more.

[gabcoh]

latency is much improved with sample rate of 16000

[gabcoh]

I just tested 15 times and latency was very good for all of them. I made some changes like clearing denosier buffer if it ever gets over 1 second and reducing the virtual mic buffer to 1600 from 16000, but I'm really not convinced that this is fixed yet.