import { type ByteRecorder } from '../ByteRecorder.js';
import { type BufferAccess } from '../../../common/BufferAccess.js';
import { type RecorderInterface } from '../../recorder/RecorderInterface.js';
/**
 * Encoder for Acorn Electron
 *
 * https://beebwiki.mdfs.net/Acorn_cassette_format
 */
export declare class ElectronEncoder implements ByteRecorder {
    private readonly recorder;
    private fBase;
    private readonly oscillator;
    constructor(recorder: RecorderInterface);
    recordPilot(length: number): void;
    begin(): void;
    end(): void;
    recordSilenceMs(lengthMs: number): void;
    recordCarrier(oscillations: number): void;
    recordGap(length: number): void;
    recordBytes(data: BufferAccess): void;
    recordByte(byte: number, dataBits?: number, parity?: ParitySetting, stopBits?: number): void;
    recordBit(value: number): void;
    setBaseFrequency(f: number): void;
}
export type ParitySetting = 'N' | 'E' | 'O';