[Scullcom] has posted the second part of his function generator build ... The design covers audio frequencies (~40Hz to 30KHz) with square, sine and triangle wave outputs. While the XR2206 can ...

From its 1 Hz lower end to its 65.5 kHz upper end, the sine wave shape remains the same ... and should you need an audio function generator and don’t mind a few shortcomings then you should ...