I recall something like that. You might be talking about baudio: https://www.npmjs.com/package/baudio . I also recall seeing some website demonstrating the idea of soundifying a stream of incoming metrics/events so you could listen to it and your brain could sift through and automatically pick our patterns, changes, and anomalies. I think there was a demo using the twitter firehose as an example? But for the life of me I can't remember anything more than that.