import type { DemucsDevice } from "../types/audio.js";
import type { Logger } from "../utils/logger.js";
export declare const ALLOWED_DEMUCS_MODELS: Set<string>;
export declare const ALLOWED_DEVICES: Set<DemucsDevice>;
/** Resolve Demucs model once from optional explicit model + separation quality. */
export declare function resolveEffectiveDemucsModel(options: {
    demucsModel?: string;
    separationQuality: "fast" | "best";
}): string;
export declare function demucsInstallGuidance(): string;
export type DemucsInvocation = {
    kind: "bin";
    command: string;
} | {
    kind: "module";
    python: string;
};
export declare function clearDemucsCache(): void;
export declare function detectDemucs(): Promise<DemucsInvocation | null>;
export declare function checkDemucsAvailability(): Promise<DemucsInvocation>;
export declare function runDemucsTwoStem(options: {
    inputPath: string;
    outputDir: string;
    model: string;
    device: DemucsDevice;
    logger?: Logger;
}): Promise<{
    vocals: string;
    noVocals: string;
}>;