Where is Edison's invention on Time Tangled island?

The PHONOGRAPH (a sound playback device) is at the Greek treasury building in 328 BC (1 o'clock on the time device). It is directly above where you first arrive in Greece. Go past the guards and climb the winged statue just to the right. From the top, you can jump to the roof.

You may want to listen to the recording before you turn it back it. (at 1882 AD).