Starcraft – Why do microphones get loud when loading Starcraft

The link contains extensive information about walling including: definitions, competitive use vs the various races, building/unit placement and the associated disadvantages. I hope this is useful and apologize again if i am doing something wrong here but I'm kind of new to this forum.

http://wiki.teamliquid.net/starcraft2/Walling

Playing AS - AGAINST

TvZ - Walling against Zerg is common to prevent zergling run bys thus preventing scouting and harassment of your mineral line.

TvP - Against Protoss you can wall off early if you are expecting a zealot rush from a proxy gateway or a 4gate rush build.

Generally as Terran walling is effective because you can use supply depots and liftable buildings to create a gate that you can control rather than a wall.

PvZ - Same as TvZ you want to wall in to prevent run bys. The difference here is that you want to leave youself a gap (1 unit wide) to allow your units to leave the base later. You need this gap because you cant move your buildings once they are planted. A zealot is a very effective plug for this gap as zealots are vastly superior to zerglings 1v1 and the zerglings will be unable to get a surround.

PvT - I refrain from walling as Protoss against Terran because I find that it just places my buildings in front of my attacking units thus enabling the Terrans to abuse the range advantage at the early stages of the game. It seems more important to have my buildings near my mineral line to prevent drops and lower the distance defending units have to travel to respond to threats.

Zv Any - walling in with buildings is nearly impossible (at least impractical) at the early stages of the game. Later high health units like roaches can be placed at the tops of ramps or in chokes to limit the enemy movement through these already small areas.

Though it doesn't take too unbearably long for me to load the "Play Versus AI" map list, it takes significantly longer than loading the multiplayer "Custom Games" list.

As a work around you can also create single player games against AI from the multiplayer screen. If you choose "Custom Game" and only add AI opponents you basically have a single player game against the computer. If you are heading for the various achievements for playing against AI opponents you even have to create the game this way. For "Play Versus AI" games there will be no achievements awarded.