If they bought soundhound for the tech to bake into their own service, they'd be competing with Shazam. If they bought Shazam for the tech to bake into their own service, soundhound would just exist as an alternative. Seems like an attempt to buy the "name brand" to get tech and inherently beat the competition at the same time.
Note: I've never heard of soundhound though, so it might be popular in some places. Shazam is like the name-brand of music recognition though, to the extent of being a verb.
