[sdiy] "Living VCOs" PCB in 2009 ?

[nicolas]

In a piano the strings don't just output energy, they also absorb energy from each other through the body of the piano.  See Weinreich -
http://www.speech.kth.se/music/5_lectures/weinreic/strings.html


--- On Thu, 11/12/08, Tom Wiltshire <tom at electricdruid.net> wrote:

> From: Tom Wiltshire <tom at electricdruid.net>
> Subject: Re: [sdiy] "Living VCOs" PCB in 2009 ?
> To: nicolas3141 at yahoo.com.au
> Received: Thursday, 11 December, 2008, 12:16 AM
> On 10 Dec 2008, at 10:53, nicolas wrote:
> 
> > Also the amount of detuning in pianos between the two
> or three strings that make up each note is carefully
> adjusted to maximise the sustain time.  There is a magical
> tiny amount of detuning that sustains longer than perfect
> unison.
> 
> How does this work?
> 
> The only way I can currently see that multiple strings
> could sustain longer than a single string would be if the
> waves summed together to produce a wave that stayed above
> the threshold of hearing when each of the individual
> components are already below it. In this case, perfect
> unison would give the strongest effect and longest sustain.
> Anything else would introduce slow volume variations as
> well, which might sound good, but wouldn't make the
> sustain longer.
> 
> Am I missing something?
> 
> Regards,
> Tom


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