The topics seem to be reset for the new year, but last year there was a question about getting more wave types besides the Saw/Square on the Korg oscillator. The filter module in Korg littleBits will self-oscillate and that will get you a sine wave if you need one. To use it, you need to put your keyboard or input into the “freq in” on top of the filter. Turn the peak knob all the way to the right. If you connect the output of the filter into the speaker, playing a note will play a continuous note into the speaker and it will change with the different keys pressed. If you want it to act more like an oscillator, put the filter into an envelope and then connect the “trigger out” from the keyboard into the “trigger in” of the envelope. Hope this is helpful!