Hiyve Components - v1.0.0
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    MusicXmlPlayerCommand:
        | { t: "play" }
        | { t: "pause" }
        | { t: "stop" }
        | { t: "next" }
        | { t: "back" }
        | { bpm: number; t: "tempo" }
        | { instrument: number; t: "volume"; volume: number }
        | { instrument: number; muted: boolean; t: "mute" }
        | { t: "noteAt"; timestamp: number }

    One player action. instrument is the index into the score's instrument list, which is the same for everyone who has the same score open. noteAt.timestamp is a score position independent of layout, so it lands on the same beat on a differently sized screen.