Dreamworkz

So my car ran up until today. I jacked up the car and put her on some jackstands today to change the tranny and differential fluid. After i was done i was gonna just take her around the block a few times, but when i went to start the car it just made a high pitched buzzing sound... no clicking just a high buzzing sound... So the engine wont even turn over so i'm guessing its something to do with the wiring, battery or fuses. i went and checked the battery wires and all the spark plugs and spark plug wires but everything is fine. I also checked the main fuse box but again they were fine... Could it be the starter?