Online tone generator, sine - square - sawtooth - triangle
Using this computer sound-card based function generator
Sound-cards are obviously very limited in their bandwidth compared to professional hardware function generators.
The result is that this computer sound card solution works very well up to about 4kHz. Beyond that only the sine wave is really usable.
Here are some readings from an oscilloscope where you can clearly see what happens.
At 500 Hz all the wave forms are quite good. The square overshoots quite a bit at the edges but it is still usable:
At 5kHz all but the sine wave form start to degrade but you can still recognize them a bit:
At 20kHz everything is only a sine wave:
© Guido Socher, License: MIT,
This software is provided without warrenty of any kind.