You are downloading the SpeakAndMix APPX file v22.214.171.124 for Windows Phone. SpeakAndMix is a free and useful Music app: This app lets you start listening to MixRadio by asking Cortana to mix some music for you. Examples of what you can say are: "mix some ... You can now download the offline APPX file to install & try it.
Download Locations for SpeakAndMix 126.96.36.199 APPX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline APPX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline SpeakAndMix APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.