Today In the morning  wrote programs for two sound experiments.For reference, Used programs written by Dr. Ajith Kumar, the inventor of ExpEYES.

Tried the experiments with square waves SQR1 and SQR2 from ExpEyes kit. We are also working on preparing a stand alone board which can give variable frequency sine waves. This will be useful in  experiments like interference of sound, phenomena of beats and Lissajous figures.Uploaded these programs to Git repo.