Wall Street Journal:

Mr. Ezrin gave the band members specific instructions: Learn and play 10 folk songs, then start writing, beginning with a folk song. Mr. McConnell’s effort, “Things People Do,” not only made the final cut, but the version included is his demo. Phish made multiple versions of the song before agreeing that nothing topped the original low-fi version, recorded on Mr. McConnell’s iPhone, sitting atop a Wurlitzer piano in his living room.

Cool. To paraphrase an aphorism, sometimes the best recording device is the one you have with you.