[LAU] audio latency question

[Folderol]

On Sun, 20 Mar 2011 18:52:24 +0000
andy baxter <andy at earthsong.free-online.co.uk> wrote:

<snip>

> The only thing I found problematic in his design wasn't to do with 
> usability but the expense (and also physical bulk) of having to use a 
> high end audio interface as part of the electronics. This put me off 
> building one myself, so I am thinking of having a go at a very similar 
> design but using a resistive rather than capacitive pressure sensing 
> technique. I.e. basically the same design but using a sheet of carbon or 
> metal loaded conductive rubber and measuring the resistance changes when 
> you scan through the matrix. If this works, it will hopefully produce 
> similar results but with much simpler electronics and firmware.
> 
> andy

This is vastly overcomplicated. Once you understand the concept itself (which
really is good), a set of dedicated oscillators and detectors (tuned
amplifiers+A/D converters) would by much simpler, smaller and reliable. I would
then be inclined to try to embed the electronics in the device itself, and bump
up the operating frequency as much a possible to improve the response time of
the detectors.

-- 
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.