So, spatial clue is the very important clue for sound motion.

因此，位置线索是非常重要的声音运动线索。

youdao

The novel twist is that a playing piece can move onto a "hotspot" and trigger tiny speakers to sound out a clue to help divine the murderer.

FORBES: Touchy Circuits

Yeah, it doesn't emulate a full surround sound system altogether that well -- the clue's in the "virtual" -- but it looks pretty good and is definitely compact, which is sort of the point with these kinds of devices.

ENGADGET: Philips' CES booth tour