export type AudibilityTrack = {
    id: string;
    enabled: boolean;
    solo: boolean;
};
export declare function hasSoloedTracks(tracks: readonly Pick<AudibilityTrack, "solo">[]): boolean;
export declare function isTrackAudible(track: Pick<AudibilityTrack, "enabled" | "solo">, anyTrackSoloed: boolean): boolean;
export declare function getAudibleTrackIds(tracks: readonly AudibilityTrack[]): Set<string>;
export declare function haveSameTrackIds(left: ReadonlySet<string>, right: ReadonlySet<string>): boolean;
export declare function toggleTrackMute(track: AudibilityTrack): void;
export declare function toggleTrackSolo(track: AudibilityTrack): void;
/**
 * The live engine must always keep a timed MIDI sequence loaded. When every
 * track is muted, retain all tracks in the engine and silence their channel
 * gains instead of loading a note-less sequence that cannot advance reliably.
 */
export declare function getEngineTrackIds(tracks: readonly AudibilityTrack[]): Set<string>;