absolute pitch

[Gregor _]

I have a customer with an absolute pitch. She called me for a tuning and 
complained about one key (E6) which sounded for her more like the F6. When 
she told me that, I had no idea about her absolute pitch. I tuned the piano 
and she still complained about that E6. I wondered what she meant: how can 
an E sound like F? I checked the temperament again and the octaves, fourths 
and fiths as well. Everything perfect. Then she told me about her absolute 
pitch. Aha! I tuned the E for her as she told me (too flat, to sharp, oh no, 
now it´s correct......). The result were inacceptable intervals! I told her 
that and tuned like I felt it´s o.k.

Seems that even an absolute pitch has fluctuations. I always wondered if an 
absolute pitch can differentiate between 440 and 439 Hz and if it´s related 
to mood, weather or so.

Gregor

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