Short description of Strobe Sync Loudspeaker Test Software 1.11: This program is a loudspeaker test software to help analyse defects and investigate functionality with the help of a synchronised LED stroboscope. The only external hardware needed is a two channel amplifier and an LED flashlight. Traditionally these tests are done with dedicated hardware devices costing several thousand dollars or Euros. Here the computer sound card supplies the two signals to the two channel amplifier.