Added Possibility for ESpeak Config

[Genei180]

Description

Fixes my Issue Described in https://github.com/MycroftAI/mycroft-core/issues/3018

The Following Options are available to Set via the Mycroft Config:

• Amplitude
• Gap
• Capital
• Pitch
• Speed (for more Information see espeak --help

Example Config:

{  
  "lang": "de-de",  
  "tts": {  
    "module": "espeak",  
    "espeak": {  
      "lang": "german-mbrola-5",  
      "voice": "german-mbrola-5",  
      "speed": "135",  
      "amplitude": "80",  
      "pitch": "20"  
    }  
  },  
  "max_allowed_core_version": 21.2  
}  

How to test

Install Espeak with the Mbrola Voice after the Mycroft Documentation for Installing German: https://mycroft-ai.gitbook.io/docs/using-mycroft-ai/customizations/languages/german

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Note

Please be extra Careful with my Git Commit History as I tried cleaning it up and I am not sure if I succeeded.

[devops-mycroft]

Hello, @Genei180, thank you for helping with the Mycroft project! We welcome everyone into the community and greatly appreciate your help as we work to build an AI for Everyone.

To protect yourself, the project, and users of Mycroft technologies we require a Contributor Licensing Agreement (CLA) before accepting any code contribution. This agreement makes it crystal clear that along with your code you are offering a license to use it within the confines of this project. You retain ownership of the code, this is just a license.

Please visit https://mycroft.ai/cla to initiate this one-time signing. Thank you!

[devops-mycroft]

Voight Kampff Integration Test Succeeded (Results)

[Genei180]

By the way could I please count this Towards my Hacktoberfest Entries? (If it passes) Thank you :)

[codecov-commenter]

Codecov Report

Merging #3020 (b9f0001) into dev (0247b3a) will increase coverage by 0.03%. The diff coverage is 72.22%.

@@            Coverage Diff             @@
##              dev    #3020      +/-   ##
==========================================
+ Coverage   53.03%   53.07%   +0.03%     
==========================================
  Files         123      123              
  Lines       11170    11187      +17     
==========================================
+ Hits         5924     5937      +13     
- Misses       5246     5250       +4     

Impacted Files	Coverage Δ
mycroft/tts/espeak_tts.py	70.27% <72.22%> (+0.27%)	:arrow_up:
mycroft/client/speech/listener.py	48.39% <0.00%> (+0.35%)	:arrow_up:

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[Genei180]

About the Plugin, I was kind of Surprised that I could actually find the Code in Mycroft core :)

If I can help with the Plugin, let me know (: But please be aware that it may take some time...

Thanks for your kind feedback!

[krisgesling]

I've also added these options to the documentation: https://mycroft-ai.gitbook.io/docs/using-mycroft-ai/customizations/tts-engine#espeak

Thanks for such a clear PR description :)