Supersaw detune frequency delta

[dennis]

Hi,

I'd like to know what is the maximum detune frequency regarding central frequency and if the relation is proportionnal (I guess yes). 

Regarding the balance parameter, it's indicated that "a value of 1 gives a mix of all oscillators with the central one lower than the sidebands". So, here again, what value gives all oscillators to the same amplitude, and what is the relation ?

I suggest to write this information in the doc, it would be very handful.

Thanks,

Dennis

[Olivier Bélanger]

Hi Dennis,

I remember spending a lot of time tweaking the lookup tables for the "detune" and "balance" parameters of SuperSaw, and if I remember correctly, no they are not proportional... You can take a look at the tables here:

https://github.com/belangeo/pyo/blob/master/src/objects/oscilmodule.c#L10710

If you plot them in a single graph, you'll have a good look at the relationship between them!

Olivier

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[dennis]

Thanks Olivier,

I was precisely looking at those tables and was noting that it was effectively not proporitionnal. I wiil analyse that thoroughly.

Dennis

[Alexandros Drymonitis]

SuperSaw()'s source code (the C code, not Python) has two 2D arrays, with 7x128 elements, where the detune and balance values are stored. If you give a value of 1, I guess you're getting the last value of the balance table, which has the same value for the first three oscillators which is 0.536732, the fourth has 0.444184, and the last three have 0.590832. These are the amplitude values. To get a balance value that will result in all oscillators having the same amplitude, you have to scan this 2D array and find if there is such a point.

In the source code, this table is found in pyo_home/src/objects/oscilmodule.c, in line 10718.

[Olivier Bélanger]

Sorry Alexandros, your message was waiting for approval, don't know why...

Olivier

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