VB-Audio's Virtual Cable is donationware - you can make any donation.
I paid EUR 2 for the drivers and EUR 2 for their excellent mixer software. Once you register, you get two additional audio cables, bringing the total to 3 + 1 for the mixer. It's excellent. I takes a while playing around with Windows' Audio settings (you have to set in the output devices "Listen to this device" on the virtual audio cables A + B and set these 2 to the 2 devices you want to listen to) and then the standard output to the voicemeter. Then in the voicemeter, set "A" to MME: cable A for "B" to MME: cable B and voila.) am sending input from Google Play to laptop speakers + bluetooth speakers at the same time. Great surround!