Irregular Sine Waves

[Perfect Human Interface]

Spectrally, the effect seems to be that of a low-passed saw wave with some subtle comb filtering.

[BobF]

BobsSineSloper.fsm

(551.49 KiB) Downloaded 885 times

Hello gang,

Here is another one I did a few hours ago. Notice that when the 2 amp/volume knobs are at zero we get almost a perfect sine wave. See the FFT window. As you change either of the amp knobs left or right you can change the slope of either the top or bottom half of the sine wave to increase harmonics. I added the FWR view just for fun so you can see its wave form and generated harmonics. Also I guess this could all be made into a nice module and also be modulated for even more effects. I guess you could call this one a sine slope modifier, but then you can change either the top, bottom, or both wave forms (triangle, saw, etc) slopes for even more harmonics. NOTE, using the knob you must change the value on the phase input of the oscillator with it to some other value than .5 so the tops and bottoms match phase wise.
Have fun and please let me know what you think of it.
Later then, BobF.....

Edit; This is a NEW fsm, if you downloaded the old one PLEASE download the new one. I made a correction and added the phase control knob!!!

[martinvicanek]

Yet another one. This one warps the long halfwave to match the slope of the short halfwave, without ever violating tulamide's curvature requirement. Pulse width range is 0 to 100%. Blame it on insomnia.

[Spogg]

Yet another one. This one warps the long halfwave to match the slope of the short halfwave, without ever violating tulamide's curvature requirement. Pulse width range is 0 to 100%. Blame it on insomnia.

Sorry but I don't get any sound or wave from this! MIDI in set and Direct Sound turned on...

@Bob:
Nice range of sound from this! Totally not what tulamide asked for but good anyway!

@All:

I thought that KG had sorted this with his dual slope ramp thing in an earlier post. It seems to fulfill the requirement perfectly so what am I missing?

Cheers

Spogg

[martinvicanek]

Yet another one. This one warps the long halfwave to match the slope of the short halfwave, without ever violating tulamide's curvature requirement. Pulse width range is 0 to 100%. Blame it on insomnia.

Sorry but I don't get any sound or wave from this! MIDI in set and Direct Sound turned on...

Ooops, my bad.
Fixed now in the upload above.

[tulamide]

@Martin
Yeah! This is it! I once again love the elegance of the design. And it works, as you mentioned, exactly as I hoped for. That's just wonderful. I love the sound as well. It is so much softer and warmer compared to straight fm.

@BobF
Wonderful! This one goes to my toolbox as well! Although it doesn't meet the criteria it is a very useful approach. The sound is a bit harsher then Martin's osc, but still convincing and really good.

@all
That doesn't mean I'll give up to dream of a spline osc
Last night I dreamt of it. It had inputs to control the start, mid and end point's y-axis and inputs to control the curvature via the 4 control points and the mid-point's x-position. It generates pretty much anything, from ramp up/down, over square and sine to absolutely exotic waves - all calculated at runtime und therefore able to make things like morphing a breeze!

But for now I will play with those two wonderful new oscillators

[BobF]

Sorry guys,

I was just going with the irregular sine wave thing and did not want to start a whole new topic.

Great work martin!

Later then, BobF.....

[adic]

Hello,
I've found a kind of formula (the following site),

http://www.bindichen.co.uk/post/Fundamentals/bell-shaped-function.html

and applied it to oscillator.

[tulamide]

Hey adic, that's a really cool idea. And it sounds good as well. Maybe some of the pros could do a dsp-version of it?

[tulamide]

Martin,

it's so embarrassing, but I can't get sound of the "pwm"-sine generator, if I use an lfo instead of any green. Could you take a look at what is happening? I don't understand it.