Ensuring smooth listening in an ever-changing world of audio streaming is quite an art and science. Such an important but overlooked process in the domain is the Upmix process, which converts multi-channel audio, such as surround sound, into a stereo or mono format. The increased number of streaming platforms has catapulted downmixing to becoming an indispensable tool to match the varieties in playback devices and network conditions. However, this process has a great influence on the audio quality streamed to the listeners.