Monthly Archives: April 2019

WaveUtils updated

Posted on April 30, 2019 by Nigel Redmon

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 advocated minimizing the number of tables necessary—one per octave—by allowing … Continue reading →

Posted in Source Code, Wavetable Oscillators | 17 Comments

WaveTableOsc optimized

Posted on April 28, 2019 by Nigel Redmon

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 that. I was curious how … Continue reading →

Posted in Source Code, Wavetable Oscillators | 6 Comments

How I write code

Posted on April 26, 2019 by Nigel Redmon

Next article I’ll post an update of our wave table oscillator, but first I’ll take the opportunity to discuss how I write code these days. Maybe it will help make sense of some of the choices in the code I … Continue reading →

Posted in Source Code | 18 Comments

Floating point denormals

Posted on April 19, 2019 by Nigel Redmon

There’s another issue with floating point hardware that can easily cause serious performance problems in DSP code. Fortunately, it’s also easy to guard against if you understand the issue. I covered this topic a few years ago in A note … Continue reading →

Posted in Math | 10 Comments

Floating point caveats

Posted on April 19, 2019 by Nigel Redmon

The equivalent of “When I was your age, we use to walk to school in the snow. Barefoot”, in DSP, is to say we used to do DSP in fixed point math. The fixed-point system could be made of integer … Continue reading →

Posted in Math | 9 Comments