[sdiy] resultant Bass, was Brain filling in fundamental

[James Dunn]

Really interesting discussion!
I was at a free jazz/improv concert recently in quite a reverberant 
space and the saxophonist (Evan Parker solo) was no doubt responding to 
the acoustics and "playing" the space. However, I remember the sound I 
heard at a certain point was distinctly like ring modulation (sum and 
difference) and it sounded like they were not in the space, but in my head!

Is this an example of non-linear mixing in the ear? Also, I've heard the 
term "the Third Ear" before but had no luck googling it. Is this also 
the same phenomena?

James

Aaron Lanterman wrote:
>
> On Jul 18, 2008, at 4:07 AM, dragon.servicing wrote:
>
>> just to confirm that some Pipe Organ manufacturers do use a 
>> combination of higher tones to produce some of the pedal Bass notes. 
>> this is because the larger pipes can work out expensive in terms of 
>> lead / tin used.
>> for those interested there is more info at
>> http://www.organstops.org/r/Resultant.html
>
> And this leads to exactly what Ian was talking about:
>
> http://en.wikipedia.org/wiki/Combination_tone
>
> - Aaron
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