diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..fb47547
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,132 @@
+import { EventEmitter } from "events";
+
+declare namespace Options {
+    type sfreq = 8 | 11.025 | 12 | 16 | 22.05 | 24 | 32 | 44.1 | 48;
+    type bitwidth = 8 | 16 | 24 | 32;
+    type mode = "s" | "j" | "f" | "d" | "m" | "l" | "r";
+    type freeformat = "FreeAmp" | "in_mpg123" | "l3dec" | "LAME" | "MAD";
+    type preset = "medium" | "standard" | "extreme" | "insane";
+    type noasm = "mmx" | "3dnow" | "sse";
+    type quality = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
+    type bitrate =
+        | 8
+        | 16
+        | 24
+        | 32
+        | 40
+        | 48
+        | 56
+        | 64
+        | 80
+        | 96
+        | 112
+        | 128
+        | 144
+        | 160
+        | 192
+        | 224
+        | 256
+        | 320;
+    type emp = "n" | 5 | "c";
+    type resample = 8 | 11.025 | 12 | 16 | 22.05 | 24 | 32 | 44.1 | 48;
+
+    interface meta {
+        title?: string;
+        artist?: string;
+        album?: string;
+        year?: string;
+        comment?: string;
+        track?: string;
+        genre?: string;
+
+        "add-id3v2"?: boolean;
+        "id3v1-only"?: boolean;
+        "id3v2-only"?: boolean;
+        "id3v2-latin1"?: boolean;
+        "id3v2-utf16"?: boolean;
+        "space-id3v1"?: boolean;
+        "pad-id3v2-size"?: number;
+        "genre-list"?: string;
+        "ignore-tag-errors"?: boolean;
+    }
+}
+
+declare interface Options {
+    output: string | "buffer";
+    raw?: boolean;
+    "swap-bytes"?: boolean;
+    sfreq?: Options.sfreq;
+    bitwidth?: Options.bitwidth;
+    signed?: boolean;
+    unsigned?: boolean;
+    "little-endian"?: boolean;
+    "big-endian"?: boolean;
+    mp2Input?: boolean;
+    mp3Input?: boolean;
+    mode?: Options.mode;
+    "to-mono"?: boolean;
+    "channel-different-block-sizes"?: boolean;
+    freeformat?: Options.freeformat;
+    "disable-info-tag"?: boolean;
+    comp?: number;
+    scale?: number;
+    "scale-l"?: number;
+    "scale-r"?: number;
+    "replaygain-fast"?: boolean;
+    "replaygain-accurate"?: boolean;
+    "no-replaygain"?: boolean;
+    "clip-detect"?: boolean;
+    preset?: Options.preset;
+    noasm?: Options.noasm;
+    quality?: Options.quality;
+    bitrate?: Options.bitrate;
+    "force-bitrate"?: boolean;
+    cbr?: boolean;
+    abr?: number;
+    vbr?: boolean;
+    "vbr-quality"?: number;
+    "ignore-noise-in-sfb21"?: boolean;
+    emp?: Options.emp;
+    "mark-as-copyrighted"?: boolean;
+    "mark-as-copy"?: boolean;
+    "crc-error-protection"?: boolean;
+    nores?: boolean;
+    "strictly-enforce-ISO"?: boolean;
+    lowpass?: number;
+    "lowpass-width"?: number;
+    highpass?: number;
+    "highpass-width"?: number;
+    resample?: Options.resample;
+    meta?: Options.meta;
+}
+
+declare interface LameStatus {
+    started: boolean;
+    finished: boolean;
+    progress: number;
+    eta: string;
+}
+
+declare class Lame {
+    constructor(options: Options);
+
+    public setFile(path: string): Lame;
+    public setBuffer(file: Buffer): Lame;
+    public getFile(): string;
+    public getBuffer(): Buffer;
+    public getEmitter(): EventEmitter;
+    public getStatus(): LameStatus;
+
+    public encode(): Promise<boolean>;
+    public decode(): Promise<boolean>;
+    private progress(type: "encode" | "decode"): Promise<boolean>;
+    private execProgress(
+        inputFilePath: string,
+        args: string[],
+        type: "encode" | "decode"
+    );
+    private tempFilePathGenerator(type: "raw" | "encoded"): string;
+    private removeTempFilesOnError();
+}
+
+export { Lame };