Hallo, PSPunch hat gesagt: // PSPunch wrote:
Can someone please give me a bit of info regarding the example illustrated in the page, http://crca.ucsd.edu/~msp/techniques/latest/book-html/node198.html
Each parabolic wave is computed from a sawtooth wave (ranging from -0.5 to 0.5) by squaring it, multiplying by 0.5, and subtracting the DC component of -1/12, or -0.08333.
I could not quite understand where this offset of 0.08333 comes from. Are there any descriptions of the theory behind this?
The theory for this technique is here: http://crca.ucsd.edu/~msp/techniques/latest/book-html/node187.html especially the equation for the parabolic wave below Fig. 10.4
The 0.08333 in the patch is 1/24 times 2: 2 * 1/24 = 0.083333333333333
Basically the whole construct below each [wrap~] is just the equation from there in Pd patch format.
Also, this example has a message connected directly to [phasor~] while a good number of other samples (including the [phasor~] help file) has a [sig~] in between. Is there any difference in the behavior?
Not really: Numbers directly connected to [phasor~]'s first inlet get converted to a constant signal inside of [phasor~] automatically now. IIRC this wasn't the case for older versions of Pd, and then you had to use a [sig~] in between to do the conversion from message to signal.
Ciao
Frank Barknecht _ ______footils.org__