[sdiy] QTC and delurk

[Mike]

 Pitch detection's major problem for bass is the long time it takes
> to lock on to pitch. Whilst there are some techniques to speed this up by
> using harmonics and harmonic relationships of string vibrations (harmonic
> shapening), this works best when there is a finite number of possibilities
> to choose from, i.e. fret positions. This systems fails for a fretless
> instruement. However, a system that has some form of hint scheme that can
> steer a pitch detector holds much hope - it's very much like giving a PLL
an
> input frequency that is close to where it needs to lock.

I have a suggestion that come from a similar core problem though not a
basss. How about set of a capacitive/proximity  sensors under the fretboard?
There are systems that can detect through 8mm plastic, so wood should be no
problem. It doesn't matter if more than one rtigger for 'hinting', and it
might be useful to detect finger postions anyway. If you're stooping more
than one string, then the problem becomes more complex, and might involve
scanning.

These people may have a product of use: http://www.qprox.com/

Just a thought.anyway

> If anyone can help on getting QTC, it would be much appreciated.
>
I think Maplin have small pieces of QTC here in the UK, I could get you
pack an post it on to you - it's fairly cheap.

HTH

Mike