AirPlay Speakers Disappeared from MacBook Pro

I have a MacBook Pro and a Macbook Air. I also have airplay speakers. The speakers showed up on both the pro and the air until Monday. Now I only see the speakers on the MacBook Air.

I made sure all software and apps are up to date on both laptops. I made sure my klipsch g17 speakers had the most recent updates. I reset my router (using my MacBook pro). Re-connected the speakers to my in-home wi-fi. Ensured all devices were connected to my wi-fi.

I still can not see my airplay speakers on my MacBook Pro, though I can see all the speakers on my MacBook Air.

Please advise how I can resolve this issue!

Thank you :-)

MacBook Pro (Retina, Mid 2012) - OS X Yosemite 10.10.3