Sound rework

[alok760]

Fixes #505 #496

Checklist

• [x] I have read the Contribution & Best practices Guide and my PR follows them.
• [x] My branch is up-to-date with the Upstream master branch.
• [ ] The unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [ ] All the functions created/modified in this PR contain relevant docstrings.

Test Passing

• [x] The SUSI Server must be building on the pi on bootup
• [x] The hotword detection should have a decent accuracy
• [ ] SUSI Linux shouldn't crash when switching from online to offline and vice versa (failing as of now)
• [ ] SUSI Linux should be able to boot offline when no internet connection available (failing)

Short description of what this resolves:

remove the secondary query processing stage and implement things in the IDLE state completely

• Music successfully stops on saying "susi, stop" and the player doesn't hang afterwards
• Low sensitivity for hotword detection issue is gone which was due to the secondary query stage
• Wake button now works while music is being played and can be used to ask queries
• Music playback stops when a query is being asked and resumes afterwards from the IDLE state

[sansyrox]

@alok760 , please look at the comments. Rest looks good.

[sansyrox]

@alok760 , why is the video_process code removed?

[alok760]

@alok760 , why is the video_process code removed?

@stealthanthrax i used the same process name that enables -

• only one sound process at a time which prevents running of sound from youtube stream and local audio stream at the same time
• removal of duplicate code