Karabiner Elements script that works with OneKey Mute Button Edition from TechKeys and brings Chime foremost to mute/unmute or mutes Teams when foremost

Chime Mute Toggle Script.md

This script works with Karabiner Elements and OneKey Mute Button Edition.

When the button is pressed it performs one of these actions evaluated in this order:

• If MS Teams is the frontmost application then it toggles mute.
• If Chime is the frontmost application then it toggles mute.
• Else it brings Chime to the front and toggles mute.

chimemute.json

{
    "title": "Support USB Mute key for Amazon Chime on macOS",
    "maintainers": ["dreamorosi"],
    "homepage": "https://gist.github.com/dreamorosi/6c2d10fa7045e5b5713904ca7716e9ce",
    "import_url": "karabiner://karabiner/assets/complex_modifications/import?url=https://gist.github.com/dreamorosi/6c2d10fa7045e5b5713904ca7716e9ce/raw/chimemute.json", 
    "rules": [
        {
            "description": "Remap USB mute key when MS Teams is frontmost",
            "manipulators": [
                {
                    "conditions": [
                        {
                            "identifiers": [
                                {
                                    "product_id": 8447,
                                    "vendor_id": 1003
                                }
                            ],
                            "type": "device_if"
                        },
                        {
                            "bundle_identifiers": [
                                "^com\\.microsoft\\.teams"
                            ],
                            "type": "frontmost_application_if"
                        }
                    ],
                    "from": {
                        "key_code": "y",
                        "modifiers": {
                            "mandatory": [
                                "left_command"
                            ]
                        }
                    },
                    "to": [
                        {
                            "key_code": "m",
                            "modifiers": [
                                "left_command",
                                "left_shift"
                            ]
                        }
                    ],
                    "type": "basic"
                }
            ]
        },
        {
            "description": "Remap USB mute key when Chime is frontmost",
            "manipulators": [
                {
                    "conditions": [
                        {
                            "identifiers": [
                                {
                                    "product_id": 8447,
                                    "vendor_id": 1003
                                }
                            ],
                            "type": "device_if"
                        },
                        {
                            "bundle_identifiers": [
                                "^com\\.amazon\\.Amazon-Chime"
                            ],
                            "type": "frontmost_application_if"
                        }
                    ],
                    "from": {
                        "key_code": "y",
                        "modifiers": {
                            "mandatory": [
                                "left_command"
                            ]
                        }
                    },
                    "to": [
                        {
                            "key_code": "y",
                            "modifiers": [
                                "left_command"
                            ]
                        }
                    ],
                    "type": "basic"
                }
            ]
        },
        {
            "description": "Remap USB mute key when Chime is not frontmost",
            "manipulators": [
                {
                    "conditions": [
                        {
                            "identifiers": [
                                {
                                    "product_id": 8447,
                                    "vendor_id": 1003
                                }
                            ],
                            "type": "device_if"
                        },
                        {
                            "bundle_identifiers": [
                                "^com\\.amazon\\.Amazon-Chime"
                            ],
                            "type": "frontmost_application_unless"
                        }
                    ],
                    "from": {
                        "key_code": "y",
                        "modifiers": {
                            "mandatory": [
                                "left_command"
                            ]
                        }
                    },
                    "to": [
                        {
                            "shell_command": "/usr/bin/osascript ~/.config/karabiner/chimeMuteToggle.scpt"
                        }
                    ],
                    "type": "basic"
                }
            ]
        }
    ]
}

chimeMuteToggle.scpt

-- ~/.config/karabiner/chimeMuteToggle.scpt
on run params
	set frontApp to (path to frontmost application as text)
    set appl to "Amazon Chime"
    set keyy to "y"
    set modifier to command down
	
	if frontApp is not equal to appl then
		
		tell application appl
			reopen
			activate
		end tell
		
		repeat until application appl is running
			delay 0.1
		end repeat

        -- IF YOU ARE GETTING INCONSISTENT (UN)MUTE BEHAVIOR, TRY INCREASING THE VALUE
        -- BELOW FROM 0.1 TO 0.5 OR EVEN 1.0
		delay 0.1
	end if
	
    tell application "System Events" to keystroke keyy using modifier

	if frontApp is not equal to appl then
        tell application frontApp
            reopen
            activate
        end tell
    end if
	
end run