“I have been told by me teacher that I should only use a tuner who uses a tuning machine and I have been told by another person that I should only use a tuner who tunes by ear. What is the truth?” Pat
This is a great question.
Here is one way to consider the answer. I play a great sounding 7’ Steinway and Sons grand piano that I rebuilt to my own specifications. It has a huge bass and clear treble. Now, with this tool, I can play beautiful music effortlessly and I will never make a mistake. Right? Of course not! The piano is simply a tool, a very good one, but still a tool, just like a hammer. It is up to the user to use the tool adequately and with skill to be successful.
Whether a piano tuner uses a Electronic Tuning Device (ETD) or they tune with only their own ears and mind, their success has less to do with the tool they use than the skill they bring to the tool. I have seen tuners who were using an ETD execute a beautiful stable tuning and others who I wished they hadn’t touched my pianos. I was left wondering if they actually listened to the mess they made of the tuning.
The same goes for aural tuners. Virgil Smith was one of the finest aural tuners I have ever met; people would fly him all over the country to tune their pianos. Other aural tuners would be better off with an EDT. It is more important to check the tuner’s skill and experience than to look for any particular tool in their tool box.