Allow user to view and play(using phone speaker) multiple waves simultaneously in Wave Generator

[neel1998]

Actual Behaviour
Currently, the user can only see or play a single wave at an instance.

Expected Behaviour
User should be able to see and play multiple waves together. For example, user should be able to play and view sine and triangular waves together.

Steps to reproduce it
Go to Wave Generator and try to view/play any wave,

LogCat for the issue
N/A

Screenshots of the issue
N/A

Would you like to work on the issue?
Open issue

[siddharth952]

I would like to work on this.