Re: [LAD] Wave shapes & forms

On Tue, Oct 21, 2014 at 2:56 PM, Philippe Coatmeur &lt;philcm(a)gnu.org&gt; wrote: If only it were so simple... Sine waves are a single frequency, which makes it "easy"; -Generate the sine using sin() from <math.h>, input desired freq in rads. Noise is random().. that's a good hint. For square waves (or any "complex" signal actually), you need to be aware of aliasing[1]. There are a number of ways of generating bandlimited square waves, but "additive synthesis" or adding of sines is probably the best way to learn / understand aliasing and its effects. The guys at MusicDSP archives[2] have a variety of oscillators and other synth building blocks. If you're trying to get things done, I advise using other peoples code: things get very complex pretty quickly... unless your aim is to understand this stuff, then merry learning! I've been doing a wavetable synth[3] which causes aliasing if done wrong very quickly, again, digging around the internet provides good resources to learn from. HTH, -Harry -- [1] http://en.wikipedia.org/wiki/Aliasing#Sampling_sinusoidal_functions [2] http://musicdsp.org/archive.php?classid=1 [3] http://openavproductions.com/ninja http://www.openavproductions.com