A wavetable oscillator—Part 1
There are many ways to make an oscillator. Without looking for further motivation, I’ll propose a wavetable oscillator. Wavetables are a fairly obvious extension of the general playback of digital...
View ArticleA wavetable oscillator—Part 2
From Part 1, we have an oscillator. But we need to broaden it to allow scaling of harmonic content based on pitch so that we have all the harmonic content we need at the low frequency end, and, as we...
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A wavetable oscillator—Part 3
In Part 2, we looked at how to use subtables designed to cover one octave each, removing upper harmonics for each higher octave to avoid aliasing. Here’s a view of the nine wavetables for our sawtooth...
View ArticleA wavetable oscillator—the code
The wavetable oscillator code follows the basic structure of most audio processing blocks, with three types of functions: at the start: initialization—create the oscillator and its wavetables as...
View ArticleA wavetable oscillator—end notes
I wrote the wavetable oscillator code from scratch as I wrote this series of articles, using just the thought process I gave. Hence, no references to other articles on wavetable oscillators. The...
View ArticleReplicating wavetables
My WaveTableOsc object uses a series of wavetables that are copies of single-cycle waveforms pre-rendered at a progressively smaller bandwidth. By “replicating wavetables” I mean taking a...
View ArticleWavetable oscillator video
If you find this video helpful, let me know, and I’ll work more video demonstrations into articles.
View ArticleWavetable signal to noise ratio
In our wavetable series, we discussed what size our wavetables needed to be in order to give us an appropriate number of harmonics. But since we interpolated between adjacent table entries, the table...
View ArticleWaveTableOsc optimized
The wave table oscillator developed here in 2012 is pretty lightweight, but I never took a close look at optimization at the time. An efficient design is the number one optimization, and it already had...
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WaveUtils updated
WaveUtils needed only a minor change for compatibility with the WaveTableOsc update—addWaveTable changes to AddWaveTable. But I added something new while I was at it. The original wave table articles...
View ArticleFurther thoughts on wave table oscillators
I see regular questions about wave table oscillators in various forums. While the process is straight forward, I sympathize that it’s not so simple to figure out what’s important if you really want to...
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