Well, I'm getting this one in early. The first improv is yesterday's. So at least I've still not missed a day of that.
Here we go, Day 338 (very Rzewski material, after listening to Akiko practice the Winnsboro Cottonmill Blues): https://ia600801.us.archive.org/8/items/Improv71812/20120718163627.mp3
and Day 339: https://ia700800.us.archive.org/7/items/Improv71712/20120717083935.mp3