Ancient texts tell of civilizations who communicated with other realms with the pitch of whistles.
this seems to be the only connection this has to do with Ancient & Lost Civilizations
and its completely erroneous
can you link to these texts ?
because otherwise this seems a very likely candidate for skunk works imo
The evidence that the pyramids and ancient mounds may possibly have been great musical instruments whose purpose is yet unknown.
what evidence ?
link ?

