Microphone & FPS issues inside garrysmod

Microphone

I have a Samson GO Mic which sounds great in windows and the steam microphone test.

When i test it inside garry’s mod it sounds worse than a mic from pound land or the dollar store. Has anyone got any tips to fix this ?

Lag

I have a i5 -2400
GTX 750ti
8gb Ram
Windows 7

When i play darkrp i only get about 30 fps. Anyone got any tips to improve this.

Make sure it’s not using your webcam mic, if you have one.