Can I use the combination of Built-in Microphone and built in Audio Function Generator for Sound Waves and Beats?

Yes. Here are two ways:

1. Set up the Audio Function Generator to use the default output (1000 Hz) and turn on just one channel. Start the LabQuest App and set up the Internal Microphone. Change the data collection rate to 20,000 points/s and the time to 0.01 second. You get a nice sine wave pattern.

2. Set the output from the Audio Function Generator for one channel to 1000 Hz (the default) and the other channel to 1100 Hz. Start the LabQuest App and set up the Internal Microphone. Use the default settings for data rate and time (8000 points/s and 0.03 seconds). You get a nice beat pattern.

Tips:
a. You can generate good waves with a lower volume. Use the Volume slider on the lower Panel of LabQuest to lower the Volume.
b. As an alternative to using the Internal Microphone, you can connect our Microphone sensor (MCA-BTA) to Channel 1. The advantage is that you could point this sensor directly at the Microphone, requiring even lower volume.

For more information about using the Function Generator, see TIL 1837: Can I get analog output from a LabQuest?.