The Octavius Wavetable is comprised of 6 different Vintage Sawtooths, each one an octave above the next. The wavetable fades very smoothly from the lowest octave all the way up to 2' octave. I thought all the wavetables were based on sine harmonics, but this is not true. When it's index is modulated by an LFO, you get the most amazing pad sounds.
[Blockierte Grafik: http://www.bobborries.com/Tutorials/OctaviusExample.jpg]
Below is a Sonogram of the swept wavetable, left to right is time, at the bottom is low frequencies and as you make your way to the top the frequencies go higher and higher. Sawtooths contain all harmonics so you see all harmonic bands at the beginning, the dark black line at the bottom (C1) indicates fundamental frequency of the perceived note, the lines get thinner the higher you go up, and the upper harmonics get fainter. At C2 the line is darkest, same for the rest, C3,C4,C5 and finally C6.
[Blockierte Grafik: http://www.bobborries.com/Tutorials/OctaviusSonogram.jpg]
Other vintage Oscillators to try are Eat Pulse, a crazy PWM type sound and Filtered Sqr, a filtered square wave (TR-606?), there's others and I'll have a detailed PDF examining all the wavetables, as well as the spectral waveshapes coming soon.
