Advanced Sessions Plugin

Could someone provide an example of how to use the voice system?

This is what I have on my player controller (PushToTalk is a input binding to the “B” key):
http://i.imgur.com/m9U2Tvj.png <= This is in my player controller

This is in my DefaultEngine.ini




[Voice] 
bEnabled=true

[/Script/Engine.GameSession]
bRequiresPushToTalk=true

[OnlineSubsystem]
PollingIntervalInMs=20
; Uncomment the following line to use the Null Subsystem
;DefaultPlatformService=Null
; Uncomment the following lines to use the Steam Subsystem
DefaultPlatformService=Steam
bHasVoiceEnabled=true
VoiceNotificationDelta=0.2 

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480
SteamAppId=480
GameServerQueryPort=27015
bRelaunchInSteam=false
GameVersion=1.0.0.0
bVACEnabled=1
bAllowP2PPacketRelay=true
P2PConnectionTimeout=90
; This is to prevent subsystem from reading other achievements that may be defined in parent .ini
Achievement_0_Id=""