diff --git a/README.md b/README.md
index 617ccf2..7b78b98 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,8 @@
 
 ## ✔注意事项
 
-⭐如果喜欢的话请帮忙star一下！⭐
+⭐ 如果喜欢的话请帮忙star支持一下！
 
-部分代码在<https://github.com/ThebestkillerTBK/MidiWriterJS>上
+🐛 有Bug可以开Issue或PR
+
+**[这里看更新日志](changelog.txt)**
diff --git a/changelog.txt b/changelog.txt
new file mode 100644
index 0000000..ad8a722
--- /dev/null
+++ b/changelog.txt
@@ -0,0 +1,4 @@
+V0.0.1 Alpha
+
+可以导出PDF琴谱，MIDI文件，MP3文件
+导出的MIDI正常播放，支持变速
\ No newline at end of file
diff --git a/functions.js b/functions.js
new file mode 100644
index 0000000..ea8ce37
--- /dev/null
+++ b/functions.js
@@ -0,0 +1,96 @@
+
+const libCCMZ = require('./libCCMZ');
+const ccApi = require('./ccApi');
+const util = require('./utils');
+const fs = require('fs');
+
+var args = require('minimist')(process.argv.slice(2));
+debug = args['dbg'];
+
+//初始化保存的文件名
+var fileName, _saveDir = 'test';
+
+let writeAndConvert = async (ccmzResolved) => {
+    if (ccmzResolved['ver'] == 2) {
+        const ccmzObj = {
+            score : JSON.parse(ccmzResolved['score']),
+            midi : JSON.parse(ccmzResolved['midi'])
+        }
+        if (util.isDetailedOutput()) console.log('解析琴谱文件完成');
+        if (debug) {
+            fs.writeFileSync(`${_saveDir}/${fileName}.json`, JSON.stringify(ccmzObj,"","\t"));
+            if (util.isDetailedOutput()) console.log('转换为json并写出');
+        }
+        if (util.isDetailedOutput()) console.log('解析MIDI');
+        libCCMZ.writeMIDI(ccmzObj['midi'], `${_saveDir}/${fileName}.mid`);
+    } else {
+        fs.writeFileSync(`${_saveDir}/${fileName}.mid`, midi);
+    }
+    
+    if (util.isDetailedOutput()) console.log('成功写出MIDI文件');
+    console.log('下载成功!');
+    if (util.isDetailedOutput()) console.log('程序已结束');
+
+}
+
+//////主程序//////
+let getCCMZ = async (musicID, saveDir, downloadMP3, downloadPDF) => {
+    _saveDir = saveDir;
+    
+    //初始化变量
+    var opernID, details, ccmzRaw;
+
+    //开始获取opernID与曲谱链接
+    opernID = await ccApi.getOpernID(musicID);
+    details = await ccApi.getDetails(opernID);
+
+    if (util.isDetailedOutput()) console.log('开始解析信息');
+    var detailsJSON = JSON.parse(details)['list'];
+
+    //解析json
+    const PDFlink = detailsJSON['pdf'];//解析PDF链接
+    const ccmzLink = detailsJSON['audition_midi'];//解析CCMZ链接
+    const MP3Link = detailsJSON['audition_urtext'];//解析MP3链接
+    const musicName = detailsJSON['name'];//获取歌曲名
+    const authorcName = detailsJSON['author'];//获取上传者
+    const typename = detailsJSON['typename'];//获取原作者
+    const paid = detailsJSON['is_pay'];//获取付费
+
+    fileName = musicName.replace(/[/\\:\|\*\?"<>]/g," ") + '-' + musicID;
+
+    console.log('解析了琴谱信息');
+    console.log(`付费歌曲: ${util.booleanString(paid == '1', true)}`)
+    console.log(`音乐名: ${musicName}`);
+    console.log(`原作者: ${typename}`);
+    console.log(`上传人: ${authorcName}`);
+
+    
+    //下载PDF或MP3
+    if (downloadMP3) {
+        if (util.isDetailedOutput()) console.log('下载MP3');
+        if (MP3Link != '') fs.writeFileSync(`${saveDir}/${fileName}.mp3`, await util.httpget(MP3Link, '', true, 'MP3', false));
+        else console.log('无mp3可下载');
+    }
+
+    if (downloadPDF) {
+        if (util.isDetailedOutput()) console.log('下载PDF');
+        if (PDFlink != '') fs.writeFileSync(`${saveDir}/${fileName}.pdf`, await util.httpget(PDFlink, '', true, 'PDF', false));
+        else console.log('无原始pdf可下载');
+    }
+
+    if (ccmzLink != '') {
+        if (util.isDetailedOutput()) console.log('开始下载并解析琴谱');
+        ccmzRaw = await libCCMZ.downloadCCMZ(ccmzLink);
+
+        //开始写出，转换CCMZ
+        if (util.isDetailedOutput()) console.log('开始解析琴谱文件');
+        libCCMZ.readCCMZ(ccmzRaw, writeAndConvert);
+    } else {
+        console.log('无MIDI可下载');
+        if (util.isDetailedOutput()) console.log('程序已结束');
+    }
+
+}
+//////主程序//////
+
+module.exports = { getCCMZ };
\ No newline at end of file
diff --git a/index.js b/index.js
index 10a9b0c..6322f26 100644
--- a/index.js
+++ b/index.js
@@ -4,19 +4,22 @@ chongchong-free by ThebestkillerTBK
 */
 
 //导入库
-const libCCMZ = require('./libCCMZ');
-const ccApi = require('./ccApi');
 const util = require('./utils');
 const path = require('path');
 const fs = require('fs');
 
+//打印信息
+console.log
+(`chongchong-free by ThebestkillerTBK
+免费下载虫虫钢琴曲谱并解密
+V${require('./package.json').version}`);
+
 //解析参数
 var args = require('minimist')(process.argv.slice(2));
 debug = args['dbg'];
 
 //显示帮助
 if (!args.i && !debug) {
-    console.log('chongchong-free by ThebestkillerTBK\n     免费下载虫虫钢琴曲谱并解密');
     console.log('-i 琴谱ID');
     console.log('-o 输出目录（可选），默认为output');
     console.log('-p 输出原始PDF（可选），默认不输出');
@@ -67,90 +70,5 @@ if (util.isDetailedOutput()) {
     console.log(`琴谱ID: ${musicID}    输出目录: ${saveDir}\n生成PDF: ${util.booleanString(downloadPDF, true)}       生成MP3: ${util.booleanString(downloadMP3, true)}`);
 }
 
-//初始化保存的文件名
-var fileName = '';
-
-let writeAndConvert = async (ccmzResolved) => {
-    if (ccmzResolved['ver'] == 2) {
-        const ccmzObj = {
-            score : JSON.parse(ccmzResolved['score']),
-            midi : JSON.parse(ccmzResolved['midi'])
-        }
-        if (util.isDetailedOutput()) console.log('解析琴谱文件完成');
-        if (debug) {
-            fs.writeFileSync(`${saveDir}/${fileName}.json`, JSON.stringify(ccmzObj,"","\t"));
-            if (util.isDetailedOutput()) console.log('转换为json并写出');
-        }
-        if (util.isDetailedOutput()) console.log('解析MIDI');
-        libCCMZ.writeMIDI(ccmzObj['midi'], `${saveDir}/${fileName}.mid`);
-    } else {
-        fs.writeFileSync(`${saveDir}/${fileName}.mid`, midi);
-    }
-    
-    if (util.isDetailedOutput()) console.log('成功写出MIDI文件');
-    console.log('下载成功!');
-    if (util.isDetailedOutput()) console.log('程序已结束');
-
-}
-
-//////主程序//////
-let getCCMZ = async () => {
-    
-    //初始化变量
-    var opernID, details, ccmzRaw;
-
-    //开始获取opernID与曲谱链接
-    opernID = await ccApi.getOpernID(musicID);
-    details = await ccApi.getDetails(opernID);
-
-    if (util.isDetailedOutput()) console.log('开始解析信息');
-    var detailsJSON = JSON.parse(details)['list'];
-
-    //解析json
-    const PDFlink = detailsJSON['pdf'];//解析PDF链接
-    const ccmzLink = detailsJSON['audition_midi'];//解析CCMZ链接
-    const MP3Link = detailsJSON['audition_urtext'];//解析MP3链接
-    const musicName = detailsJSON['name'];//获取歌曲名
-    const authorcName = detailsJSON['author'];//获取上传者
-    const typename = detailsJSON['typename'];//获取原作者
-    const paid = detailsJSON['is_pay'];//获取付费
-
-    fileName = musicName.replace(/[/\\:\|\*\?"<>]/g," ") + '-' + musicID;
-
-    console.log('解析了琴谱信息');
-    console.log(`付费歌曲: ${util.booleanString(paid == '1', true)}`)
-    console.log(`音乐名: ${musicName}`);
-    console.log(`原作者: ${typename}`);
-    console.log(`上传人: ${authorcName}`);
-
-    
-    //下载PDF或MP3
-    if (downloadMP3) {
-        if (util.isDetailedOutput()) console.log('下载MP3');
-        if (MP3Link != '') fs.writeFileSync(`${saveDir}/${fileName}.mp3`, await util.httpget(MP3Link, '', true, 'MP3', false));
-        else console.log('无mp3可下载');
-    }
-
-    if (downloadPDF) {
-        if (util.isDetailedOutput()) console.log('下载PDF');
-        if (PDFlink != '') fs.writeFileSync(`${saveDir}/${fileName}.pdf`, await util.httpget(PDFlink, '', true, 'PDF', false));
-        else console.log('无原始pdf可下载');
-    }
-
-    if (ccmzLink != '') {
-        if (util.isDetailedOutput()) console.log('开始下载并解析琴谱');
-        ccmzRaw = await libCCMZ.downloadCCMZ(ccmzLink);
-
-        //开始写出，转换CCMZ
-        if (util.isDetailedOutput()) console.log('开始解析琴谱文件');
-        libCCMZ.readCCMZ(ccmzRaw, writeAndConvert);
-    } else {
-        console.log('无MIDI可下载');
-        if (util.isDetailedOutput()) console.log('程序已结束');
-    }
-
-}
-//////主程序//////
-
 //进入主程序
-getCCMZ()
\ No newline at end of file
+require('./functions').getCCMZ(musicID, saveDir, downloadMP3, downloadPDF);
\ No newline at end of file
diff --git a/libCCMZ.js b/libCCMZ.js
index 970cdca..d0310bb 100644
--- a/libCCMZ.js
+++ b/libCCMZ.js
@@ -1,7 +1,6 @@
 const JSZip = require('jszip');
 const util = require('./utils');
-var MidiWriter = require('./midi-writer-js');//源代码在https://github.com/ThebestkillerTBK/MidiWriterJS
-const { forEach } = require('jszip');
+var MidiWriter = require('midi-writer-js');
 
 //歌谱和midi
 class CCMZ {
diff --git a/package.json b/package.json
index 672bf81..e9e920c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "chongchong-free",
-  "version": "1.0.0",
+  "version": "0.0.1",
   "description": "free www.gangqinpu.com",
   "main": "index.js",
   "repository": {
@@ -12,14 +12,15 @@
   "homepage": "https://github.com/ThebestkillerTBK/chongchong-free",
   "dependencies": {
     "jszip": "^3.7.1",
+    "midi-writer-js": "^2.0.1",
     "minimist": "^1.2.5",
     "needle": "^3.0.0",
     "pkg": "^5.5.2",
     "tonal-midi": "^0.69.7"
   },
-  "bin":"index.js",
+  "bin": "index.js",
   "scripts": {
     "run": "node index.js --dbg",
     "build": "pkg . --targets node14-win-x64,node14-macos-x64,node14-linux-x64 -o ./dist/chongchong-free"
- }
+  }
 }