Thank you for Clearly described the problem.
Don't worry ,Our engineers work with you together.
1.The Live Sound like pop.
1) Try to insert 3.5mm audio in and setting it in media page.
2) Try to set to media page -->Volume go down -1 or -2
2.Choice a fine Resolution for live streaming
1) if your client is only use mobile to see the streaming. 1280*720@25 1500 -2000 kbps is good.
2) if more people use pc or tv to see streaming. 1280*720@25 2500-3000kbps is good .
If you have any question please feel free to contact me.