diff --git a/src/decrypt/common.js b/src/decrypt/common.js
index 101a975..fcb4195 100644
--- a/src/decrypt/common.js
+++ b/src/decrypt/common.js
@@ -2,6 +2,7 @@ const NcmDecrypt = require("./ncm");
 const QmcDecrypt = require("./qmc");
 const RawDecrypt = require("./raw");
 const MFlacDecrypt = require("./mflac");
+const TmDecrypt = require("./tm");
 
 export {CommonDecrypt}
 
@@ -16,9 +17,11 @@ async function CommonDecrypt(file) {
         case "mp3":// Raw Mp3
         case "flac"://Raw Flac
         case "m4a":// todo: Raw M4A
+            rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
+            break;
         case "tm0":// QQ Music IOS Mp3
         case "tm3":// QQ Music IOS Mp3
-            rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
+            rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, "mp3");
             break;
         case "qmc3"://QQ Music Android Mp3
         case "qmc0"://QQ Music Android Mp3
@@ -31,7 +34,7 @@ async function CommonDecrypt(file) {
             break;
         case "tm2":// todo: QQ Music IOS M4A
         case "tm6":// todo: QQ Music IOS M4A
-            debugger;
+            rt_data = await TmDecrypt.Decrypt(file.raw, raw_filename);
             break;
         default:
             rt_data = {status: false, message: "不支持此文件格式",}
diff --git a/src/decrypt/tm.js b/src/decrypt/tm.js
new file mode 100644
index 0000000..185de44
--- /dev/null
+++ b/src/decrypt/tm.js
@@ -0,0 +1,14 @@
+const rawDecrypt = require("./raw");
+const util = require("./util");
+export {Decrypt}
+const header = [0x00, 0x00, 0x00, 0x20, 0x66, 0x74, 0x79, 0x70];
+
+async function Decrypt(file, raw_filename) {
+    const fileBuffer = await util.GetArrayBuffer(file);
+    const audioData = new Uint8Array(fileBuffer);
+    for (let cur = 0; cur < 8; ++cur) {
+        audioData[cur] = header[cur];
+    }
+    const musicData = new Blob([audioData], {type: "audio/mp4"});
+    return await rawDecrypt.Decrypt(musicData, raw_filename, "m4a")
+}