diff --git a/_docs/api.md b/_docs/api.md
index a7c27925..becdd230 100644
--- a/_docs/api.md
+++ b/_docs/api.md
@@ -478,8 +478,12 @@ playBgm: fn(bgm: string, startTime?: number)
 bgm: 背景音乐的文件名，支持全塔属性中映射前的中文名
 startTime: 跳过前多少秒，不填则不跳过
 
-playSound: fn(sound: string)
+playSound: fn(sound: string, pitch?: number, callback?: fn()) -> number
 播放一个音效
+sound: 音效名；可以使用文件别名。
+pitch: 播放的音调；可选，如果设置则为30-300之间的数值；100为正常音调。
+callback: 可选，播放完毕后执行的回调函数。
+返回：一个数字，可用于core.stopSound的参数来只停止该音效。
 
 registerAnimationFrame: fn(name: string, needPlaying: bool, func?: fn(timestamp: number))
 注册一个 animationFrame
@@ -550,6 +554,11 @@ destX: 鼠标或手指的起拖点横坐标
 destY: 鼠标或手指的起拖点纵坐标
 stepPostfix: 拖动轨迹的数组表示，每项为一步的方向和目标点。
 
+setBgmSpeed: fn(speed: number, usePitch?: bool)
+设置背景音乐的播放速度和音调
+speed: 播放速度，必须为30-300中间的值。100为正常速度。
+usePitch: 是否同时改变音调（部分设备可能不支持）
+
 setBuff: fn(name: string, value: number)
 设置主角某个属性的百分比修正倍率，初始值为1，
 倍率存放在flag: '__'+name+'_buff__' 中
@@ -640,8 +649,8 @@ stopAutomaticRoute: fn()
 stopReplay: fn(force?: bool)
 停止播放
 
-stopSound: fn()
-停止所有SE
+stopSound: fn(id?: number)
+停止播放音效。如果未指定id则停止所有音效，否则只停止指定的音效。
 
 syncLoad: fn()
 从服务器加载存档
diff --git a/_server/CodeMirror/defs.js b/_server/CodeMirror/defs.js
index dd4ee119..c69b4130 100644
--- a/_server/CodeMirror/defs.js
+++ b/_server/CodeMirror/defs.js
@@ -2189,12 +2189,12 @@ var terndefs_f6783a0a_522d_417e_8407_94c67b692e50 = [
           "!type": "fn(name: string, value: ?)"
         },
         "playSound": {
-          "!doc": "播放一个音效",
-          "!type": "fn(sound: string)"
+          "!doc": "播放一个音效<br/>sound: 音效名；可以使用文件别名。<br/>pitch: 播放的音调；可选，如果设置则为30-300之间的数值。<br/>callback: 可选，播放完毕后执行的回调函数。<br/>返回：一个数字，可用于core.stopSound的参数来只停止该音效。",
+          "!type": "fn(sound: string, pitch?: number, callback?: fn()) -> number"
         },
         "stopSound": {
-          "!doc": "停止所有SE", 
-          "!type": "fn()"
+          "!doc": "停止播放音效。如果未指定id则停止所有音效，否则只停止指定的音效。", 
+          "!type": "fn(id?: number)"
         }, 
         "addGameCanvasTranslate": {
           "!doc": "加减画布偏移", 
diff --git a/_server/MotaAction.g4 b/_server/MotaAction.g4
index 3b4ee833..c9d4605f 100644
--- a/_server/MotaAction.g4
+++ b/_server/MotaAction.g4
@@ -823,6 +823,7 @@ action
     |   playSound_1_s
     |   stopSound_s
     |   setVolume_s
+    |   setBgmSpeed_s
     |   win_s
     |   lose_s
     |   restart_s
@@ -2462,32 +2463,42 @@ return code;
 */;
 
 playSound_s
-    :   '播放音效' EvalString '停止之前音效' Bool? Newline
+    :   '播放音效' EvalString '停止之前音效' Bool? '音调' IntString? '等待播放完毕' Bool? Newline
     
 
 /* playSound_s
 tooltip : playSound: 播放音效
 helpUrl : /_docs/#/instruction
-default : ["item.mp3",false]
+default : ["item.mp3",false,"",false]
 colour : this.soundColor
 allSounds : ['EvalString_0']
 material : ["./project/sounds/", "EvalString_0"]
+if (IntString_0) {
+    if (parseInt(IntString_0) < 30 || parseInt(IntString_0) > 300) throw '音调设置只能在30-300之间；100为正常音调。';
+    IntString_0 = ', "pitch": ' + IntString_0;
+} else IntString_0 = '';
 Bool_0 = Bool_0 ? ', "stop": true' : '';
-var code = '{"type": "playSound", "name": "'+EvalString_0+'"'+Bool_0+'},\n';
+Bool_1 = Bool_1 ? ', "sync": true' : '';
+var code = '{"type": "playSound", "name": "'+EvalString_0+'"'+Bool_0+IntString_0+Bool_1+'},\n';
 return code;
 */;
 
 playSound_1_s
-    :   '播放系统音效' NameMap_List '停止之前音效' Bool? Newline
+    :   '播放系统音效' NameMap_List '停止之前音效' Bool? '音调' IntString? '等待播放完毕' Bool? Newline
     
 
 /* playSound_1_s
 tooltip : playSound: 播放系统音效
 helpUrl : /_docs/#/instruction
-default : ["确认",false]
+default : ["确认",false,"",false]
 colour : this.soundColor
+if (IntString_0) {
+    if (parseInt(IntString_0) < 30 || parseInt(IntString_0) > 300) throw '音调设置只能在30-300之间；100为正常音调。';
+    IntString_0 = ', "pitch": ' + IntString_0;
+} else IntString_0 = '';
 Bool_0 = Bool_0 ? ', "stop": true' : '';
-var code = '{"type": "playSound", "name": "'+NameMap_List_0+'"'+Bool_0+'},\n';
+Bool_1 = Bool_1 ? ', "sync": true' : '';
+var code = '{"type": "playSound", "name": "'+NameMap_List_0+'"'+Bool_0+IntString_0+Bool_1+'},\n';
 return code;
 */;
 
@@ -2518,6 +2529,21 @@ var code = '{"type": "setVolume", "value": '+Int_0+IntString_0+async+'},\n';
 return code;
 */;
 
+setBgmSpeed_s
+    :   '设置背景音乐播放速度' Int '同时改变音调' Bool Newline
+    
+
+/* setBgmSpeed_s
+tooltip : setSpeed: 设置背景音乐播放速度
+helpUrl : /_docs/#/instruction
+default : [100, true]
+colour : this.soundColor
+if (Int_0 < 30 || Int_0 > 300) throw '速度只能设置只能在30-300之间；100为正常速度。';
+Bool_0 = Bool_0?', "pitch": true':'';
+var code = '{"type": "setBgmSpeed", "value": '+Int_0+Bool_0+'},\n';
+return code;
+*/;
+
 win_s
     :   '游戏胜利,结局' ':' EvalString? '不计入榜单' Bool '不结束游戏' Bool Newline
     
diff --git a/_server/MotaActionParser.js b/_server/MotaActionParser.js
index 7ba294f9..3b673eaa 100644
--- a/_server/MotaActionParser.js
+++ b/_server/MotaActionParser.js
@@ -642,10 +642,10 @@ ActionParser.prototype.parseAction = function() {
       var knownItems = MotaActionBlocks['NameMap_List'].options.map(function (one) {return one[1];});
       if (knownItems.indexOf(data.name) >= 0) {
         this.next = MotaActionBlocks['playSound_1_s'].xmlText([
-          data.name,data.stop,this.next]);
+          data.name,data.stop,data.pitch||"",data.sync,this.next]);
       } else {
         this.next = MotaActionBlocks['playSound_s'].xmlText([
-          data.name,data.stop,this.next]);
+          data.name,data.stop,data.pitch||"",data.sync,this.next]);
       }
       break;
     case "playBgm":
@@ -676,6 +676,10 @@ ActionParser.prototype.parseAction = function() {
       this.next = MotaActionBlocks['setVolume_s'].xmlText([
         data.value, data.time, data.async||false, this.next]);
       break
+    case "setBgmSpeed":
+      this.next = MotaActionBlocks['setBgmSpeed_s'].xmlText([
+        data.value, data.pitch||false, this.next]);
+      break;
     case "setValue":
       this.next = MotaActionBlocks['setValue_s'].xmlText([
         this.expandIdBlock([data.name]), data["operator"]||'=',
diff --git a/_server/editor_blocklyconfig.js b/_server/editor_blocklyconfig.js
index fea6aaa9..2e9ab074 100644
--- a/_server/editor_blocklyconfig.js
+++ b/_server/editor_blocklyconfig.js
@@ -213,6 +213,7 @@ editor_blocklyconfig=(function(){
       MotaActionBlocks['playSound_1_s'].xmlText(),
       MotaActionBlocks['stopSound_s'].xmlText(),
       MotaActionBlocks['setVolume_s'].xmlText(),
+      MotaActionBlocks['setBgmSpeed_s'].xmlText(),
       MotaActionBlocks['callBook_s'].xmlText(),
       MotaActionBlocks['callSave_s'].xmlText(),
       MotaActionBlocks['autoSave_s'].xmlText(),
diff --git a/libs/control.js b/libs/control.js
index 343404cd..f064cd1b 100644
--- a/libs/control.js
+++ b/libs/control.js
@@ -2695,6 +2695,25 @@ control.prototype._playBgm_play = function (bgm, startTime) {
     core.material.bgms[bgm].play();
     core.musicStatus.playingBgm = bgm;
     core.musicStatus.lastBgm = bgm;
+    core.setBgmSpeed(100);
+}
+
+///// 设置当前背景音乐的播放速度 //////
+control.prototype.setBgmSpeed = function (speed, usePitch) {
+    var bgm = core.musicStatus.playingBgm;
+    if (main.mode!='play' || !core.material.bgms[bgm]) return;
+    bgm = core.material.bgms[bgm];
+    if (speed < 30 || speed > 300) return;
+    bgm.playbackRate = speed / 100;
+    core.musicStatus.bgmSpeed = speed;
+
+    if (bgm.preservesPitch != null) {
+        if (bgm.__preservesPitch == null) bgm.__preservesPitch = bgm.preservesPitch;
+        if (usePitch == null)  bgm.preservesPitch = bgm.__preservesPitch;
+        else if (usePitch) bgm.preservesPitch = false;
+        else bgm.preservesPitch = true;
+        core.musicStatus.bgmUsePitch = usePitch;
+    }
 }
 
 ////// 暂停背景音乐的播放 //////
@@ -2718,8 +2737,13 @@ control.prototype.pauseBgm = function () {
 control.prototype.resumeBgm = function (resumeTime) {
     if (main.mode!='play')return;
     try {
+        var speed = core.musicStatus.bgmSpeed;
+        var usePitch = core.musicStatus.bgmUsePitch;
         core.playBgm(core.musicStatus.playingBgm || core.musicStatus.lastBgm || main.startBgm,
             resumeTime ? core.musicStatus.pauseTime : 0);
+        if (resumeTime) {
+            core.setBgmSpeed(speed, usePitch);
+        }
     }
     catch (e) {
         console.log("无法恢复BGM");
@@ -2748,7 +2772,7 @@ control.prototype.triggerBgm = function () {
 }
 
 ////// 播放音频 //////
-control.prototype.playSound = function (sound) {
+control.prototype.playSound = function (sound, pitch, callback) {
     sound = core.getMappedName(sound);
     if (main.mode!='play' || !core.musicStatus.soundStatus || !core.material.sounds[sound]) return;
     try {
@@ -2757,16 +2781,22 @@ control.prototype.playSound = function (sound) {
             source.buffer = core.material.sounds[sound];
             source.connect(core.musicStatus.gainNode);
             var id = setTimeout(null);
+            if (pitch && pitch >= 30 && pitch <= 300) {
+                source.playbackRate.setValueAtTime(pitch / 100, 0);
+            } 
             source.onended = function () {
                 delete core.musicStatus.playingSounds[id];
+                if (callback) callback();
             }
+            core.musicStatus.playingSounds[id] = source;
             if (source.start) source.start(0);
             else if (source.noteOn) source.noteOn(0);
-            core.musicStatus.playingSounds[id] = source;
+            return id;
         }
         else {
             core.material.sounds[sound].volume = core.musicStatus.userVolume;
             core.material.sounds[sound].play();
+            if (callback) callback();
         }
     }
     catch (e) {
@@ -2776,18 +2806,23 @@ control.prototype.playSound = function (sound) {
 }
 
 ////// 停止所有音频 //////
-control.prototype.stopSound = function () {
-    for (var i in core.musicStatus.playingSounds) {
-        var source = core.musicStatus.playingSounds[i];
-        try {
-            if (source.stop) source.stop();
-            else if (source.noteOff) source.noteOff();
-        }
-        catch (e) {
-            main.log(e);
-        }
+control.prototype.stopSound = function (id) {
+    if (id == null) {
+        Object.keys(core.musicStatus.playingSounds).forEach(function (id) {
+            core.control.stopSound(id);
+        });
+        return;
     }
-    core.musicStatus.playingSounds = {};
+    var source = core.musicStatus.playingSounds[id];
+    if (!source) return;
+    try {
+        if (source.stop) source.stop();
+        else if (source.noteOff) source.noteOff();
+    }
+    catch (e) {
+        main.log(e);
+    }
+    delete core.musicStatus.playingSounds[id];
 }
 
 ////// 检查bgm状态 //////
diff --git a/libs/core.js b/libs/core.js
index 11ee0a3a..4b31fc3e 100644
--- a/libs/core.js
+++ b/libs/core.js
@@ -64,6 +64,8 @@ function core() {
         'playingSounds': {}, // 正在播放的SE
         'userVolume': 1.0, // 用户音量
         'designVolume': 1.0, //设计音量
+        'bgmSpeed': 100, // 背景音乐速度
+        'bgmUsePitch': null, // 是否同时修改音调
         'cachedBgms': [], // 缓存BGM内容
         'cachedBgmCount': 8, // 缓存的bgm数量
     }
diff --git a/libs/events.js b/libs/events.js
index 5eed254f..6e0c2966 100644
--- a/libs/events.js
+++ b/libs/events.js
@@ -1722,8 +1722,12 @@ events.prototype._action_freeBgm = function (data, x, y, prefix) {
 
 events.prototype._action_playSound = function (data, x, y, prefix) {
     if (data.stop) core.stopSound();
-    core.playSound(data.name);
-    core.doAction();
+    if (data.sync) {
+        core.playSound(data.name, data.pitch, core.doAction);
+    } else {
+        core.playSound(data.name, data.pitch);
+        core.doAction();
+    }
 }
 
 events.prototype._action_stopSound = function (data, x, y, prefix) {
@@ -1737,6 +1741,11 @@ events.prototype._action_setVolume = function (data, x, y, prefix) {
     this.__action_doAsyncFunc(data.async, core.setVolume, data.value, data.time || 0);
 }
 
+events.prototype._action_setBgmSpeed = function (data, x, y, prefix) {
+    core.setBgmSpeed(data.value, data.pitch || false);
+    core.doAction();
+}
+
 events.prototype._action_setValue = function (data, x, y, prefix) {
     this.setValue(data.name, data.operator, data.value, prefix);
     if (!data.norefresh) {
diff --git a/runtime.d.ts b/runtime.d.ts
index 2ea4c36e..8f393565 100644
--- a/runtime.d.ts
+++ b/runtime.d.ts
@@ -774,6 +774,9 @@ declare class control {
     /** 恢复背景音乐的播放 */
     resumeBgm(resumeTime?: number): void
 
+    /** 设置背景音乐的播放速度和音调 */
+    setBgmSpeed(speed: number, usePitch?: bool): void
+
     /** 设置音乐图标的显隐状态 */
     setMusicBtn(): void
 
@@ -781,10 +784,10 @@ declare class control {
     triggerBgm(): void
 
     /** 播放一个音效 */
-    playSound(sound: string): void
+    playSound(sound: string, pitch?: number, callback?: () => any): number
 
-    /** 停止所有音频 */
-    stopSound(): void
+    /** 停止（所有）音频 */
+    stopSound(id?: number): void
 
     /** 检查bgm状态 */
     checkBgm(): void