In this video, I show how to create a bandlimited sawtooth in Reaktor using the BLIT (bandlimited impulse train) method. While the math can be a little tricky, the end result gives you a waveform that is perfectly bandlimited to any specification and can be easily transformed into a triangle or pulse wave as well.
Click here to view the video on YouTube.
The oscillator has 3 basic components – the ramp accumulator common to almost every type of oscillator, a BLIT generator, and a special type of filter called a leaky integrator that shapes incoming BLITs into a bandlimited sawtooth shape.
Bandlimited oscillators are a key component of any analog modelling synth. Even if you aren’t going for an analog sound, digital aliasing can distort sounds in unpleasant ways, creating frequency-dependent artifacts.
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