What application to use two appletvs to play same thing?

Mine have always been in sync (or at least close enough that going from room to room I don't notice it). Are you using ethernet, wifi or a combination?

 

it should give you the option to play on multiple rooms if you are using a laptop. I dont think you can do that with iphone or ipad

 

You can try Airfoil

 

No comprendo.

Why would you expect two separate ATV devices to be synchronized?

U maybe looking at things more dedicated for what you want like Sonos.

 

More to the point: why do you need simultaneous streaming in a studio? How big is the room that you need two separate sets of speakers!?

 

You have not mentioned what your audio setup is. Chances are that the aTVs actually are in sync, but the slight difference in timing that you are hearing is down to your AMP/DAC's processing.

If you want perfect sync, I don't understand why you would use 2 aTVs. Just use one and split the audio to two amps. But as other have said, why have 4 speakers in one room?

 

i send mine to 4 speakers, and it's all in sync.

i've got an iHome iW2, B&W A7, denon surround sound system, and airport express with speakers.

(can also use an aTV hooked to the denon, and that works fine too)

long skinny apartment, so while you can't hear all 4, you can hear 3 at a time.

I'll second auto pilot's guess that the aTV is in sync, but there's something in your speakers/amplifier that is a bit slow.

or on the off chance you've got some distance between the speakers, it might be the delay in the time it takes sound to travel (100 feet will be about 1/10 of a second delay)