[Fluxus] start-audio and gh defined numerically

[David Griffiths]

On 07/06/13 05:17, Robert Herman wrote:
> 
> I looked up the 'gh' help, but I am not sure about the low-level details
> for something like:
> 
> (colour (vector (gh 0) 0 1))
> 
> What's the difference between gh 1 or say, gh 8 in terms of which
> frequency bands it actually is of the 16 bins that will auto-wrap once
> you go above 16. Is it simply one of 16 bands from the fft of the total
> audio spectrum?

Correct, and the number of bands is configurable with
(set-num-frequency-bins)

> Second, if I use a gh in a colour or rotate statement, the rotate
> magnitudes are great and the colour swings are minimal. How can I get
> the colour to swing more from red to blue and tone down the rotates
> separately? A gain command affects both.

Simply multiply the output of (gh) for the colour? Maybe I'm missing
something...

It might be useful to have a normalised version of (gh) - I seem to
remember this existing at one point?

cheers,

dave