Live audio can be added while creating a drawing in InGrid app.
How to use:
1.Open a new drawing page. Click on the 'recording' button to start recording as shown. Next start with a drawing using drawing tools. Now add an audio related to the drawing such as explanation, or steps to draw etc.
2. Once the drawing is over, you can stop recording by pressing the same 'recording' button. The video gets saved in 'Videos' folder of the device.