https://www.microsoft.com/en-us/p/dts-sound-unbound/9pj0nkl8mcsj?activetab=pivot:overviewtab DTS Sound Unbound application (normally $19.99) is $9.99 for a limited time. You may need to install the app, and purchase through it to get the pricing. (That's how I discovered it) I don't know if Dolby Access (Atmos for Headphones) is on sale, tho I got it while it was 20% off awhile back. EDIT: Appears Dolby Access (Atmos for Headphones) is $4.50 off as well. Normally, it's $14.99.