Air Play

I was so excited until I read the link.  I'm just like most folks and prefer to play internet radio, Pandora or something other than what is installed on my device.  So If I understand the article correctly, you can only stream to one device at a time if the music is not stored on your iPad.  Is that correct?  If so, are there other possibilities?

To clarify:
You did not state what you are sending from Mac, iPhone, etc.
Also Airfoil has many had new features added since that article you read ... my bad ... sorry.

In that previously posted link, I was referring to two options.
1/ Multiroom Music/Radio Player by WHAALE for AirPlay(TM) speakers.
support for multiple speakers.
Link:
https://itunes.apple.com/jp/app/multiroom-music-radio-player/id663776918?mt=8&ign-mpt=uo%3D4

2/Airfoil for Mac $29
"Send any audio from your Mac to AirPort Express units, Apple TVs, iPhones and iPods Touch, and even other Macs and PCs"
It says "any audio" & "Play Web Video" so that includes radio support.

Read in the link below: Recent Feature Additions.
"Receive from iOS Devices
Play audio from your iOS device out through your Mac! Airfoil can even help you send audio from iOS to multiple outputs."
"Receive From iTunes Too!
Airfoil Speakers can also now receive audio directly from iTunes running on another machine. "
"Play Web Video
With Airfoil Video Player's new Web mode, you can watch Netflix, Hulu & more, in sync with remote audio."
Airfoil requires Mac OS X 10.9 (Mavericks) or higher.
Link:
https://rogueamoeba.com/airfoil/mac/

Michael.
I apologize.  I should have been more descriptive with my question.  I use an HP ENVY Windows 7 laptop and the latest Apple iPad.  I would like to be able to mirror EITHER unit to my Samsung (latest version) TV.  I would like to find one adapter that will allow me to stream from either platform if that's possible.
Sorry for the misunderstanding.

This didn't work for me because it restricts you to music installed on your device and I play internet radio.