pulse.rules = [
{
    # prevent all sources matching "Chromium" from messing with the volume
    matches = [ { application.name = "~Chromium.*" } ]
    actions = { quirks = [ block-source-volume ] }
}
{
    matches = [ { application.process.binary = "Discord" } ]
    actions = { quirks = [ block-source-volume ] }
}
]