SoundHound AI stock gained 23.5% last month despite mixed reactions to company news. Is it time to jump aboard this AI bandwagon?Shares of SoundHound AI (SOUN 0.31%) rose 23.5% in September 2025, according to data from S&P Global Market Intelligence. It wasn't a smooth ride for the artificial intelligence (AI) expert, with several big jumps and a couple of painful drops along the way -- but it's hard to complain about a monthly gain of more than 20%.The meme stock crowd is back in actionUnfortunately, it lo ...