Those are both additional proof cases, but I wasn't talking about either Shazam (which does a lot of processing remotely) or "wake words" although I'm familiar with the accuracy and compute power requirements for those. Multi-keyword detection for advertising with >50% FAR/FRR is much easier than either of them. A conversation is likely to hear the word (or related ones) mentioned multiple time by multiple parties and the matcher can be tuned to the individual locally.