1.   A portable sound system blared military Marches, part of a continuing campaign of psychological warfare.

2.   Ever since then, people have been conducting tests upon different generations of sound recording systems.

3.   Including simultaneous translation booths, matched sound systems and theatre standard lighting capable of handling the most complex conference productions.

4.   The sound system crackles, the projector is faulty, the auditorium is dank and all but empty.

5.   The sound system is state-of-the-art.

6.   Any difference between the two sound systems is impalpable to all but the most discerning audiophiles.

7.   There were also no books anywhere and no immediate evidence of a sound system.

8.   Now we are looking to more powerful sound systems.

9.   This controlled situation is the result of having the fire alarm, public address voice evacuation and pro-audio sound systems all interfaced.

10.   Claps, admittedly quite reserved at first, from the audience, crackles from the sound system, and pop drank in large quantities.