Lately I have used some time and research on the standard pitch at 440Hz..
The tuning of A4=440Hz has been used a couple of times in late 1800 but it was not until 1939 at an international conference it was suggested as a true international standard to help musicians around the world to be able to play together in tune and for the production of musical instrument,, later on it became and ISO standard..
But in 1859 the french decided on the Diapason normal at 435Hz as a compromise between the inflation in pitch and the singers complaining about feeling stresswhen they have to sing at 440Hz and above...
1859 A=435Hz, Karlsruhe, Germany. Pitch at the German opera. Kapellmeister Jos. Strauss felt that this pitch fatigued his singers the least and was the best pitch for the performance of operas from all periods. Strauss' fork became the pitch standard for the French Commission's Diapason Normal.
I have sung for 20 years (deeper baritone) and always felt that 440Hz was never in the sweet spot for me (independent of key).. I tried to sing on A3 (octave below tone generators A4) from A4=450Hz to A4=415Hz which is in fact a G#4,
I found two spots where it felt most natural.. Around 433Hz and 424Hz, not 440Hz.. Eventhough 450Hz is higher in pitch than 440Hz i found that singing on a A3 in A4=450Hz tuning felt more natural than at 440Hz. 450Hz corresponds to 424Hz just a half key above..
anybody else experimented with alternative tunings ?? what were your findings..
Lately I have tried to pitch MP3 files in audacity to 435Hz,, not the 432Hz Verdi tuning that is prevalent on the net as the new age meditation pitch.. I do find 432Hz to "soft" or "low" for pop/rocj music,, but 435Hz really hits home with me.. THe high belts of Whitney houston and Celine DIon is more pleasent and sound more natural at 435Hz than at 440Hz...