1 hour and 5 minutes to tune a horrible piano horribly out of tune . . . Here's a warts-and-all video with some things I did which on review I don't like but the result was remarkably successful. The instrument presented difficulties that you'll see and hear and I hope that it might be helpful to anyone starting tuning. But it's not purely a machine tuning - it was in partnership with what I was hearing. I overran by 10 minutes and to do a better tuning I'd have liked 1 1/2 hours or a little longer but nothing would make this really a wonderful concert instrument.