To each his own, Wim. It's true I haven't tried using an ETD myself, but I've watched tuning with one. It didn't look tempting to me. And I hate blinky lights and twitching little readouts. I sometimes even turn off overhead fluorescent lights because they bother me. But mainly, I like the direct contact with the piano, and the interplay of intervals. I just like the sounds. Anyway, enjoy your SAT IV. Susan
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