diff --git a/163_music_downloader.js b/163_music_downloader.js
index 2216a45..01f778a 100755
--- a/163_music_downloader.js
+++ b/163_music_downloader.js
@@ -38,6 +38,27 @@ function createRL() {
   return { rl, ask };
 }
 
+function parseNumberSelection(input, total, { emptyMeansAll = false } = {}) {
+  const value = input.trim().toLowerCase();
+  if (value === 'a' || (!value && emptyMeansAll)) {
+    return Array.from({ length: total }, (_, index) => index + 1);
+  }
+  if (!value || value === '0') return [];
+
+  const indices = new Set();
+  for (const part of value.split(/[,，\s]+/)) {
+    const rangeMatch = part.match(/^(\d+)-(\d+)$/);
+    if (rangeMatch) {
+      const start = parseInt(rangeMatch[1], 10);
+      const end = parseInt(rangeMatch[2], 10);
+      for (let number = start; number <= end; number++) indices.add(number);
+    } else if (/^\d+$/.test(part)) {
+      indices.add(parseInt(part, 10));
+    }
+  }
+  return [...indices].filter(number => number >= 1 && number <= total).sort((a, b) => a - b);
+}
+
 function printBanner() {
   console.log('');
   console.log('╔══════════════════════════════════════════╗');
@@ -62,7 +83,7 @@ function printMenu() {
   console.log('│  9. 下载历史               │');
   console.log('│  0. 设置音质等级           │');
   console.log('│  s. 按歌名搜索             │');
-  console.log('│  a. 下载完整专辑           │');
+  console.log('│  a. 下载专辑/指定曲目       │');
   console.log('│  b. 批量ID下载             │');
   console.log('│  f. 从文件批量下载         │');
   console.log('│  n. 从文件名识别并补全标签 │');
@@ -962,22 +983,34 @@ async function main() {
             console.log(`  ${String(i + 1).padStart(2)}. ${track.name} - ${artists}`);
           });
 
+          const trackPick = await ask('\n选择歌曲序号 (如 1,3,5 或 2-6，a/回车=全部，0=取消): ');
+          const selectedIndices = parseNumberSelection(trackPick, album.tracks.length, { emptyMeansAll: true });
+          if (!selectedIndices.length) {
+            if (trackPick.trim() !== '0') console.log('⚠️  没有有效的歌曲序号');
+            break;
+          }
+          const selectedTracks = selectedIndices.map(number => ({
+            track: album.tracks[number - 1],
+            trackIndex: number - 1,
+          }));
+
           level = await askLevel(ask, level);
-          const confirm = await ask(`确认下载整张专辑? (y/n): `);
+          const confirm = await ask(`确认下载选中的 ${selectedTracks.length} 首歌曲? (y/n): `);
           if (confirm.trim().toLowerCase() !== 'y') break;
 
-          const albumTarget = getAlbumDownloadTarget(album, album.tracks[0], 0);
+          const firstItem = selectedTracks[0];
+          const albumTarget = getAlbumDownloadTarget(album, firstItem.track, firstItem.trackIndex);
           await saveAlbumCover(album.picUrl, albumTarget.outputDir);
 
-          for (let i = 0; i < album.tracks.length; i++) {
-            const track = album.tracks[i];
+          for (let i = 0; i < selectedTracks.length; i++) {
+            const { track, trackIndex } = selectedTracks[i];
             const artists = track.ar?.map(a => a.name).join(' / ') || album.artist?.name || '未知';
-            const target = getAlbumDownloadTarget(album, track, i);
+            const target = getAlbumDownloadTarget(album, track, trackIndex);
             await waitIfPaused();
-            console.log(`\n[${i + 1}/${album.tracks.length}] ${track.name} - ${artists}`);
+            console.log(`\n[${i + 1}/${selectedTracks.length}] ${track.name} - ${artists}`);
             try { await downloadSong(track.id, level, target); }
             catch (e) { console.error(`  ❌ 出错: ${e.message}`); }
-            if (i < album.tracks.length - 1) await sleep(500);
+            if (i < selectedTracks.length - 1) await sleep(500);
           }
           break;
         }
@@ -1050,13 +1083,25 @@ async function main() {
         }
 
         console.log(`\n💿 共 ${albumsToDownload.length} 张专辑，${allSongs.length} 首歌曲`);
+        allSongs.forEach((item, index) => {
+          const albumSuffix = albumsToDownload.length > 1 ? ` [${item.albumName}]` : '';
+          console.log(`  ${String(index + 1).padStart(2)}. ${item.song.name} - ${item.song.artists}${albumSuffix}`);
+        });
+        const songPick = await ask('\n选择歌曲序号 (如 1,3,5 或 2-6，a/回车=全部，0=取消): ');
+        const selectedIndices = parseNumberSelection(songPick, allSongs.length, { emptyMeansAll: true });
+        if (!selectedIndices.length) {
+          if (songPick.trim() !== '0') console.log('⚠️  没有有效的歌曲序号');
+          break;
+        }
+        const songsToDownload = selectedIndices.map(number => allSongs[number - 1]);
+
         level = await askLevel(ask, level);
-        const confirm = await ask(`确认下载? (y/n): `);
+        const confirm = await ask(`确认下载选中的 ${songsToDownload.length} 首歌曲? (y/n): `);
         if (confirm.trim().toLowerCase() !== 'y') break;
 
         const savedCoverDirs = new Set();
-        for (let i = 0; i < allSongs.length; i++) {
-          const item = allSongs[i];
+        for (let i = 0; i < songsToDownload.length; i++) {
+          const item = songsToDownload[i];
           const s = item.song;
           const target = getAlbumDownloadTarget({
             name: item.albumName,
@@ -1068,10 +1113,10 @@ async function main() {
             savedCoverDirs.add(target.outputDir);
           }
           await waitIfPaused();
-          console.log(`\n[${i + 1}/${allSongs.length}] ${s.name} - ${s.artists}`);
+          console.log(`\n[${i + 1}/${songsToDownload.length}] ${s.name} - ${s.artists}`);
           try { await downloadSong(s.id, level, target); }
           catch (e) { console.error(`  ❌ 出错: ${e.message}`); }
-          if (i < allSongs.length - 1) await sleep(500);
+          if (i < songsToDownload.length - 1) await sleep(500);
         }
         break;
       }
@@ -2023,7 +2068,7 @@ async function main() {
         console.log(`  ║  3  输入歌单 ID 下载全部 - 输入歌单ID批量下载             ║`);
         console.log(`  ║  s  按歌名搜索 - 按歌名精确搜索，支持试听/详情/下载      ║`);
         console.log(`  ║  6  按歌手批量下载 - 搜索歌手并选择下载其歌曲             ║`);
-        console.log(`  ║  a  下载完整专辑 - 输入专辑ID下载全部曲目，也支持名称搜索 ║`);
+        console.log(`  ║  a  下载专辑 - 输入专辑ID或名称，可按序号选择曲目          ║`);
         console.log(`  ║                                                          ║`);
         console.log(`  ║  【查看与管理】                                           ║`);
         console.log(`  ║  4  查看歌单歌曲列表 - 浏览歌单内容，可选择性下载         ║`);
diff --git a/normalize_person_separators.js b/normalize_person_separators.js
new file mode 100644
index 0000000..97c1e93
--- /dev/null
+++ b/normalize_person_separators.js
@@ -0,0 +1,300 @@
+const fs = require('fs');
+const path = require('path');
+const util = require('util');
+const { spawnSync } = require('child_process');
+
+const LOG_FILE = path.join(__dirname, 'log.txt');
+let activeLogPath = null;
+let logFinished = false;
+let originalConsoleLog = null;
+let originalConsoleError = null;
+
+const AUDIO_EXTENSIONS = new Set(['.mp3', '.flac', '.m4a', '.aac', '.ogg', '.opus', '.wav']);
+const PERSON_TAGS = new Set([
+  'artist',
+  'artists',
+  'album_artist',
+  'albumartist',
+  'album_artists',
+  'albumartists',
+  'composer',
+  'lyricist',
+  'text_writer',
+  'textwriter',
+  'writer',
+  'arranger',
+  'producer',
+  'mixer',
+  'performer',
+  'conductor',
+  'sort_artist',
+  'artist_sort',
+  'artistsort',
+  'sort_album_artist',
+  'album_artist_sort',
+  'albumartistsort',
+  'sort_composer',
+  'composer_sort',
+  'composersort',
+]);
+
+function printHelp() {
+  console.log(`批量规范音频人物标签中的分隔符
+
+用法:
+  node normalize_person_separators.js [目录] [--apply] [--backup]
+
+参数:
+  目录       要递归扫描的目录，默认为 Music
+  --apply    实际修改文件；不传时只预览
+  --backup   修改前创建同名 .bak 备份，仅与 --apply 一起生效
+  -h, --help 显示帮助
+
+示例:
+  node normalize_person_separators.js
+  node normalize_person_separators.js "D:\\Music"
+  node normalize_person_separators.js Music --apply --backup
+`);
+}
+
+function appendLog(text) {
+  if (activeLogPath) fs.appendFileSync(activeLogPath, text, 'utf8');
+}
+
+function startApplyLog(options) {
+  activeLogPath = LOG_FILE;
+  const startedAt = new Date().toISOString();
+  fs.appendFileSync(
+    activeLogPath,
+    `\n===== apply 开始 ${startedAt} =====\n目标目录: ${options.targetDir}\n创建备份: ${options.backup ? '是' : '否'}\n命令: ${process.argv.map(value => JSON.stringify(value)).join(' ')}\n`,
+    'utf8',
+  );
+
+  originalConsoleLog = console.log;
+  originalConsoleError = console.error;
+  console.log = (...args) => {
+    originalConsoleLog(...args);
+    appendLog(`${util.format(...args)}\n`);
+  };
+  console.error = (...args) => {
+    originalConsoleError(...args);
+    appendLog(`${util.format(...args)}\n`);
+  };
+  process.once('exit', finishApplyLog);
+}
+
+function finishApplyLog() {
+  if (!activeLogPath || logFinished) return;
+  logFinished = true;
+  appendLog(`===== apply 结束 ${new Date().toISOString()} =====\n`);
+  console.log = originalConsoleLog;
+  console.error = originalConsoleError;
+  activeLogPath = null;
+}
+
+function mirrorChildOutput(output, isError = false) {
+  if (!output) return;
+  const text = String(output);
+  (isError ? process.stderr : process.stdout).write(text);
+  appendLog(text.endsWith('\n') ? text : `${text}\n`);
+}
+
+function parseArgs(argv) {
+  let targetDir = null;
+  let apply = false;
+  let backup = false;
+
+  for (const arg of argv) {
+    if (arg === '-h' || arg === '--help') return { help: true };
+    if (arg === '--apply') apply = true;
+    else if (arg === '--backup') backup = true;
+    else if (arg.startsWith('-')) throw new Error(`未知参数: ${arg}`);
+    else if (targetDir === null) targetDir = arg;
+    else throw new Error(`只能指定一个目录: ${arg}`);
+  }
+
+  return {
+    help: false,
+    apply,
+    backup,
+    targetDir: path.resolve(targetDir || path.join(__dirname, 'Music')),
+  };
+}
+
+function normalizeTagKey(key) {
+  return key.toLowerCase().replace(/[\s-]+/g, '_');
+}
+
+function normalizePersonValue(value) {
+  if (typeof value !== 'string') return value;
+  return value
+    .replace(/\s+&\s+/g, ' / ')
+    .replace(/,\s+/g, ' / ');
+}
+
+function findAudioFiles(dirPath) {
+  const files = [];
+  for (const entry of fs.readdirSync(dirPath, { withFileTypes: true })) {
+    const entryPath = path.join(dirPath, entry.name);
+    if (entry.isDirectory()) files.push(...findAudioFiles(entryPath));
+    else if (entry.isFile() && AUDIO_EXTENSIONS.has(path.extname(entry.name).toLowerCase())) files.push(entryPath);
+  }
+  return files;
+}
+
+function readTags(filePath) {
+  const result = spawnSync('ffprobe', [
+    '-v', 'error',
+    '-show_entries', 'format_tags',
+    '-of', 'json',
+    filePath,
+  ], { encoding: 'utf8', windowsHide: true });
+  mirrorChildOutput(result.stderr, true);
+  if (result.error) throw result.error;
+  if (result.status !== 0) throw new Error(`ffprobe 退出码: ${result.status}`);
+  return JSON.parse(result.stdout).format?.tags || {};
+}
+
+function collectChanges(tags) {
+  const changes = [];
+  for (const [key, oldValue] of Object.entries(tags)) {
+    if (!PERSON_TAGS.has(normalizeTagKey(key))) continue;
+    const newValue = normalizePersonValue(oldValue);
+    if (newValue !== oldValue) changes.push({ key, oldValue, newValue });
+  }
+  return changes;
+}
+
+function replaceFileAtomically(sourcePath, replacementPath, sourceStat) {
+  const displacedPath = `${sourcePath}.normalize-original-${process.pid}`;
+  if (fs.existsSync(displacedPath)) throw new Error(`保护文件已存在: ${displacedPath}`);
+
+  fs.renameSync(sourcePath, displacedPath);
+  try {
+    fs.renameSync(replacementPath, sourcePath);
+    fs.chmodSync(sourcePath, sourceStat.mode);
+    fs.utimesSync(sourcePath, sourceStat.atime, sourceStat.mtime);
+    fs.unlinkSync(displacedPath);
+  } catch (error) {
+    if (fs.existsSync(sourcePath)) fs.unlinkSync(sourcePath);
+    fs.renameSync(displacedPath, sourcePath);
+    throw error;
+  }
+}
+
+function applyChanges(filePath, changes, createBackup) {
+  const extension = path.extname(filePath);
+  const tempPath = path.join(
+    path.dirname(filePath),
+    `.${path.basename(filePath, extension)}.normalize-${process.pid}-${Date.now()}${extension}`,
+  );
+  const backupPath = `${filePath}.bak`;
+  const sourceStat = fs.statSync(filePath);
+
+  if (fs.existsSync(tempPath)) throw new Error(`临时文件已存在: ${tempPath}`);
+  if (createBackup) fs.copyFileSync(filePath, backupPath, fs.constants.COPYFILE_EXCL);
+
+  const args = [
+    '-v', 'error',
+    '-i', filePath,
+    '-map', '0',
+    '-map_metadata', '0',
+    '-c', 'copy',
+  ];
+  for (const change of changes) args.push('-metadata', `${change.key}=${change.newValue}`);
+  args.push(tempPath);
+
+  try {
+    const result = spawnSync('ffmpeg', args, { encoding: 'utf8', windowsHide: true });
+    mirrorChildOutput(result.stdout);
+    mirrorChildOutput(result.stderr, true);
+    if (result.error) throw result.error;
+    if (result.status !== 0) throw new Error(`ffmpeg 退出码: ${result.status}`);
+    replaceFileAtomically(filePath, tempPath, sourceStat);
+  } catch (error) {
+    if (fs.existsSync(tempPath)) fs.unlinkSync(tempPath);
+    throw error;
+  }
+}
+
+function main() {
+  let options;
+  try {
+    options = parseArgs(process.argv.slice(2));
+  } catch (error) {
+    console.error(`参数错误: ${error.message}`);
+    process.exitCode = 1;
+    return;
+  }
+
+  if (options.help) {
+    printHelp();
+    return;
+  }
+  if (!fs.existsSync(options.targetDir) || !fs.statSync(options.targetDir).isDirectory()) {
+    console.error(`目录不存在: ${options.targetDir}`);
+    process.exitCode = 1;
+    return;
+  }
+  if (options.apply) {
+    try {
+      startApplyLog(options);
+      console.log(`完整日志将追加写入: ${LOG_FILE}`);
+    } catch (error) {
+      console.error(`无法创建日志文件: ${error.message}`);
+      process.exitCode = 1;
+      return;
+    }
+  }
+  if (options.backup && !options.apply) {
+    console.log('提示: 当前是预览模式，--backup 不会创建备份。');
+  }
+
+  let files;
+  try {
+    files = findAudioFiles(options.targetDir);
+  } catch (error) {
+    console.error(`扫描目录失败: ${error.message}`);
+    process.exitCode = 1;
+    return;
+  }
+
+  console.log(`${options.apply ? '修改' : '预览'}模式，扫描目录: ${options.targetDir}`);
+  console.log(`找到 ${files.length} 个音频文件。\n`);
+
+  let matchedFiles = 0;
+  let changedFiles = 0;
+  let failedFiles = 0;
+
+  for (const filePath of files) {
+    try {
+      const changes = collectChanges(readTags(filePath));
+      if (!changes.length) continue;
+      matchedFiles++;
+      console.log(path.relative(options.targetDir, filePath) || path.basename(filePath));
+      for (const change of changes) {
+        console.log(`  ${change.key}: ${change.oldValue} -> ${change.newValue}`);
+      }
+      if (options.apply) {
+        applyChanges(filePath, changes, options.backup);
+        changedFiles++;
+        console.log('  已修改');
+      }
+      console.log('');
+    } catch (error) {
+      failedFiles++;
+      console.error(`${filePath}\n  处理失败: ${error.message}\n`);
+    }
+  }
+
+  if (options.apply) {
+    console.log(`完成：匹配 ${matchedFiles} 个，修改 ${changedFiles} 个，失败 ${failedFiles} 个。`);
+  } else {
+    console.log(`预览完成：${matchedFiles} 个文件需要修改，失败 ${failedFiles} 个。`);
+    if (matchedFiles) console.log('确认无误后加 --apply 执行；如需保留原文件，再加 --backup。');
+  }
+  if (failedFiles) process.exitCode = 1;
+  finishApplyLog();
+}
+
+main();