/**
 * Adds the header bytes necessary for writing low-speed cassettes.
 */
export declare function wrapLowSpeed(bytes: Uint8Array): Uint8Array;
/**
 * Encode the sequence of bytes as an array of audio samples for low-speed cassettes.
 * @param bytes cas-style array of bytes, including 256 zero bytes, sync byte, and trailing zero bytes.
 * @param sampleRate number of samples per second in the generated audio.
 * @param baud the baud rate (250, 500, or 1000).
 */
export declare function encodeLowSpeed(bytes: Uint8Array, sampleRate: number, baud: number): Int16Array;
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