How to download and setup polyphone
Open terminal and run command
                                            git clone https://github.com/davy7125/polyphone.git
                                        
                                        git clone is used to create a copy or clone of polyphone repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with polyphone https://github.com/davy7125/polyphone/archive/master.zip
Or simply clone polyphone with SSH
                                            [email protected]:davy7125/polyphone.git                                    
                                    If you have some problems with polyphone
You may open issue on polyphone support forum (system) here: https://github.com/davy7125/polyphone/issuesSimilar to polyphone repositories
Here you may see polyphone alternatives and analogs
openage tiled liteide qt qutebrowser MuseScore mapbox-gl-native qTox Clementine antimony flameshot gqrx mixxx appleseed pywebview toggldesktop edb-debugger openauto CuteMarkEd LibreCAD qgroundcontrol otter-browser feedback QDarkStyleSheet stellarium hotspot GoldenCheetah SlicerGitSVNArchive qtbase nitroshare-desktop