I looked at the code for the violin tuner
but cant see how on earth it works. It sounds like it is playing a sampled violin sound.
>if you can't tell if it is in tune or not by your ear you will never become a true musician.
I'm sorry but the above IS true, sadly resulting in a lot of musicians that don't really play 'in tune'
I never mentioned perfect pitch which is another thing entirely. It is the relative pitch that is important and if you don't use it, you lose it.
Perfect pitch is an imaginary thing. Such people who appear to have it are either remembering a reference note for the much longer period than normal. Everyone who has sung in a choir can easily remember a note for a short while it's just perfect pitch people remember it much longer.
The same as some people can remember obscure facts or do mental arithmetic (or remember which API to use for an application!)
Alternately you can fairly easily determine any note very accurately be singing the lowest note you are capable of in your mind then jumping up (in your mind) to the one you want. I can generally get to a few cycles from the right note this way. When you have a cold and sing lower you can easily correct for this by singing the note softly.
It is wrong for instance to tune to a piano or electronic keyboard because fifths and fourths must be miss-tuned slightly to achieve keyboard tempering otherwise you can never play them in all keys correctly.
In conclusion I would suggest that tuning detectors only be used for setting the A string and the ear for the others.