diff --git a/Global/Global.c b/Global/Global.c
index ab7da0e..87d9670 100644
--- a/Global/Global.c
+++ b/Global/Global.c
@@ -101,8 +101,7 @@ int16_t MIC_VOL_MAP[11]= {-9000,-7000,-5000,-3000,-1000,1000,3000,5000,7000,9000
 
 uint8_t TOUCH_AREA_NUM = (sizeof(Touch_Areas)/sizeof(Touch_AreaTypeDef));
 
-const uint8_t Version[3] = {0,2,14}; /* major.minor.patch — 0.2.14: local song mid-play no Stop+Start; power-on reset KEY_ID */
-
+const uint8_t Version[3] = {0,2,14}; /* major.minor.patch — 0.2.14: local song mid-play fix + power-on KEY_ID reset + dual MIDI bank (merge) */
 uint8_t Led = 8;
 bool PressFlag = 0;
 
diff --git a/MyCode/App_Auto.c b/MyCode/App_Auto.c
index 5762bf1..19b8b36 100644
--- a/MyCode/App_Auto.c
+++ b/MyCode/App_Auto.c
@@ -329,9 +329,19 @@ static int App_Auto_MapNoteOn(int channel, int key)
 static void Func_CallBack_ProgramChange(int channel, int program)
 {
     MidiFifoItem_t midimsg;
+    uint8_t ch = (uint8_t)(channel & 0x0F);
     LOG_I("REG", "pc ch%u prog=%d", (unsigned)channel, program);
-    midimsg.msg[0] = 0xc0 | (channel & 0x0F);
-    midimsg.msg[1] = program;
+    /* 双音色库：伴奏一律先切 Bank0（CC0 MSB=0, CC32 LSB=0）再 PC */
+    midimsg.msg[0] = 0xb0 | ch;
+    midimsg.msg[1] = 0x00;              /* CC0 Bank MSB */
+    midimsg.msg[2] = MIDI_BANK_ACCOMP;
+    midimsg.msglen = 3;
+    mymidififo_InQueue(&m_MidiSendFifo,&midimsg);
+    midimsg.msg[1] = 0x20;              /* CC32 Bank LSB */
+    midimsg.msg[2] = 0;
+    mymidififo_InQueue(&m_MidiSendFifo,&midimsg);
+    midimsg.msg[0] = 0xc0 | ch;
+    midimsg.msg[1] = (uint8_t)program;
     midimsg.msg[2] = 0;
     midimsg.msglen = 2;
     mymidififo_InQueue(&m_MidiSendFifo,&midimsg);
diff --git a/UI/UI_Idle.c b/UI/UI_Idle.c
index 6c55895..4045b7c 100644
--- a/UI/UI_Idle.c
+++ b/UI/UI_Idle.c
@@ -85,7 +85,14 @@ extern int8_t delta;
 extern STRING_MIDI USE_MIDI;
 void LoadConfig(void)
 {
-    SendProgramChangeMidiEvent(0,Timbre_index[mGuiData[GUI_TIMBRE_SELECT].Current]);
+    uint8_t ch;
+
+    /* 双音色库：主弦走 Bank1，先选 bank 再 PC */
+    SendProgramWithBankMidiEvent(0, MIDI_BANK_STRING, Timbre_index[mGuiData[GUI_TIMBRE_SELECT].Current]);
+
+    /* 伴奏通道预置 Bank0，避免上电后首个 PC 前误用残留 bank */
+    for (ch = 1; ch <= 15; ch++)
+        SendBankChangeMidiEvent(ch, MIDI_BANK_ACCOMP);
 
     uint8_t val_127 = (faders[0].val * 127) / 10;
     SendVolumeChangeMidiEvent(1,val_127);
diff --git a/UI/UI_global.c b/UI/UI_global.c
index 27cea57..6cb729a 100644
--- a/UI/UI_global.c
+++ b/UI/UI_global.c
@@ -942,7 +942,8 @@ void label_TimbreSelece_ui(const LEBEL_UI *UI, GUI_SWITCH * Group)
 	switch(Group->Id)
 	{
 		case GUI_TIMBRE_SELECT:
-			SendProgramChangeMidiEvent(0,Timbre_index[Group->Current]);
+			/* 双音色库：主弦走 Bank1，先选 bank 再 PC */
+			SendProgramWithBankMidiEvent(0, MIDI_BANK_STRING, Timbre_index[Group->Current]);
 		break;
 		default:
 			break;
diff --git a/midi/midi_send.c b/midi/midi_send.c
index 16016d8..6dce55f 100644
--- a/midi/midi_send.c
+++ b/midi/midi_send.c
@@ -27,10 +27,21 @@ void SendVolumeChangeMidiEvent(uint8_t channel,uint8_t CC)
   SendMidiDataToDreamDSP(midibuff,3);
 }
   
-void SendBankChangeMidiEvent(uint8_t CC)
+/* Bank Select：CC0(MSB)=bank，CC32(LSB)=0。Dream 双音色库：0=伴奏，1=主弦 */
+void SendBankChangeMidiEvent(uint8_t channel, uint8_t bank)
 {
-  uint8_t midibuff[3] = {0xB0 ,0x00, CC };
+  uint8_t midibuff[3] = {0xB0|(channel & 0x0F) ,0x00, bank };
   SendMidiDataToDreamDSP(midibuff,3);
+  midibuff[1] = 0x20;  /* CC32 Bank LSB */
+  midibuff[2] = 0;
+  SendMidiDataToDreamDSP(midibuff,3);
+}
+
+/* 先选 Bank 再 Program Change，避免漏发 Bank Select 落到错误音色库 */
+void SendProgramWithBankMidiEvent(uint8_t channel, uint8_t bank, uint8_t program)
+{
+  SendBankChangeMidiEvent(channel, bank);
+  SendProgramChangeMidiEvent(channel, program);
 }
 
 void SendMidiDataToDreamDSP(uint8_t* buff, uint16_t cnt)
diff --git a/midi/midi_send.h b/midi/midi_send.h
index df1646a..50d835e 100644
--- a/midi/midi_send.h
+++ b/midi/midi_send.h
@@ -2,11 +2,16 @@
 #define __MIDI_SEND_H__
 
 
+/* Dream 音色库 Bank：0=自动伴奏，1=主音色/弦 */
+#define MIDI_BANK_ACCOMP   0
+#define MIDI_BANK_STRING   1
+
 /* MIDI 发送函数 */
 void SendNoteOnMidiEvent(uint8_t Key, uint8_t OnVal);
 void SendNoteOffMidiEvent(uint8_t Key, uint8_t OffVal);
 void SendProgramChangeMidiEvent(uint8_t channel, uint8_t CC);
-void SendBankChangeMidiEvent(uint8_t CC);
+void SendBankChangeMidiEvent(uint8_t channel, uint8_t bank);
+void SendProgramWithBankMidiEvent(uint8_t channel, uint8_t bank, uint8_t program);
 void SendVolumeChangeMidiEvent(uint8_t channel, uint8_t CC);
 void SendMidiDataToDreamDSP(uint8_t* buff, uint16_t cnt);
 void DefaultTask_SendMsg(uint16_t Data1, uint16_t Data2, uint16_t Data3, uint16_t Data4);
diff --git a/midi/midi_tables.c b/midi/midi_tables.c
index 72a35e9..fd9483e 100644
--- a/midi/midi_tables.c
+++ b/midi/midi_tables.c
@@ -220,7 +220,7 @@ const STRING_MIDI *Chord_Midi_Table[7] =
 const STRING_MIDI *OrganChord_Midi_Table[7] = 
 { OrganMIDI_1,OrganMIDI_2,OrganMIDI_3,OrganMIDI_4,OrganMIDI_5,OrganMIDI_6, OrganMIDI_7 };
 
-/* UI槽位0~4 → MIDI Program Change：24尼龙 / 25钢弦 / 27清音 / 30失真 / 33 Finger贝斯 */
+/* UI槽位0~4 → MIDI Program Change（Bank1）：24尼龙 / 25钢弦 / 27清音 / 30失真 / 33电贝司 */
 const uint8_t Timbre_index[5] = {0x18, 0x19, 0x1B, 0x1E, 0x21};
 
 
diff --git a/project/inc/ExtFlash_Tone_Addr.h b/project/inc/ExtFlash_Tone_Addr.h
index 27e7326..d85d49a 100644
--- a/project/inc/ExtFlash_Tone_Addr.h
+++ b/project/inc/ExtFlash_Tone_Addr.h
@@ -4,10 +4,10 @@
 /* Auto-generated by tools/pack_extflash_tone_0903.py — do not hand-edit. */
 /* W25Q128 absolute offsets. Boot logo display uses UI0902_BOOT_LOGO_ADDR. */
 /* Tone resource pack has no in-bin version field; release tag = EXTFLASH_TONE_RES_VER. */
-#define EXTFLASH_TONE_RES_VER           "0915"
+#define EXTFLASH_TONE_RES_VER           "0916"
 #define EXTFLASH_TONE_RES_VER_MAJOR     0
 #define EXTFLASH_TONE_RES_VER_MINOR     9
-#define EXTFLASH_TONE_RES_VER_PATCH     15
+#define EXTFLASH_TONE_RES_VER_PATCH     16
 
 #define EXTFLASH_LOGO_ADDR              0x00000000UL
 #define EXTFLASH_LOGO_SIZE              52080UL
@@ -18,13 +18,13 @@
 #define EXTFLASH_CHARGING_H             190
 
 #define EXTFLASH_BIN1_RHYTHM_ADDR       0x0001B8F0UL
-#define EXTFLASH_BIN1_RHYTHM_SIZE       506071UL
+#define EXTFLASH_BIN1_RHYTHM_SIZE       506746UL
 
 #define EXTFLASH_BIN2_SONG_HAITIAN_ADDR 0x0009D07DUL
 #define EXTFLASH_BIN2_SONG_HAITIAN_SIZE 41914UL
 
 #define EXTFLASH_BIN3_UNIVERSAL_ADDR    0x000A7437UL
-#define EXTFLASH_BIN3_UNIVERSAL_SIZE    33815UL
+#define EXTFLASH_BIN3_UNIVERSAL_SIZE    33945UL
 
 /* Convenience aliases used by UI ADDRESS */
 #define FLASH_ADDR_MODE_NORMAL          EXTFLASH_BIN1_RHYTHM_ADDR   /* 普通 */
@@ -35,8 +35,8 @@
 /* Legacy AutoBand bank — not repacked; may overlap 2.bin — do not enable until remapped */
 #define FLASH_ADDR_AUTOBAND_LEGACY      0x0009EB5FUL
 
-#define EXTFLASH_TONE_PACK_END          0x000AF84EUL
-#define EXTFLASH_TONE_PACK_SIZE         718926UL
+#define EXTFLASH_TONE_PACK_END          0x000AF8D0UL
+#define EXTFLASH_TONE_PACK_SIZE         719056UL
 #define UI0902_RES_BASE_SAFE_GAP        (0x00100000UL - EXTFLASH_TONE_PACK_END)
 
 #endif
diff --git a/protocol/git_user_fw_ver.h b/protocol/git_user_fw_ver.h
index 8d5c54a..abc95e5 100644
--- a/protocol/git_user_fw_ver.h
+++ b/protocol/git_user_fw_ver.h
@@ -1,16 +1,16 @@
 /* Auto-generated by tools/gen_git_user_fw_ver.py — do not edit.
- * git HEAD (dirty): 8a8c7ec377314f1b712d58afbedeb0c631dfaba5
+ * git HEAD (dirty): merge-in-progress
  * branch: develop → develop
- * 01 0C wire: develop_8a8c7e*
+ * 01 0C wire: develop_merge*
  */
 #ifndef GIT_USER_FW_VER_H
 #define GIT_USER_FW_VER_H
 
-#define GIT_COMMIT_ID_FULL   "8a8c7ec377314f1b712d58afbedeb0c631dfaba5"
+#define GIT_COMMIT_ID_FULL   "0000000000000000000000000000000000000000"
 #define GIT_BRANCH_NAME      "develop"
-#define GIT_COMMIT_SHORT6    "8a8c7e"
+#define GIT_COMMIT_SHORT6    "000000"
 #define GIT_DIRTY            (1)
-#define GIT_BUILD_ID         "develop_8a8c7e*"
+#define GIT_BUILD_ID         "develop_000000*"
 #define GIT_BUILD_ID_LEN     15u
 
 #endif /* GIT_USER_FW_VER_H */
diff --git a/tools/pack_extflash_tone_0903.py b/tools/pack_extflash_tone_0903.py
index 4f021f6..22433a0 100644
--- a/tools/pack_extflash_tone_0903.py
+++ b/tools/pack_extflash_tone_0903.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-"""Pack external W25Q128 tone/logo image for K1 (0915).
+"""Pack external W25Q128 tone/logo image for K1 (0916_bank).
 
 Layout (absolute W25Q128 offsets):
   0x00000000  logo.bin      (legacy pad; boot UI uses UI0902 full-screen logo)
@@ -10,10 +10,10 @@ Layout (absolute W25Q128 offsets):
   after 2.bin 3.bin         万能模式（随 2.bin 长度后移；写入 ExtFlash_Tone_Addr.h）
 
 Outputs:
-  tools/out/extflash_tone_0915.bin / .res
-  tools/out/extflash_ALL_tone0915_ui0902.res
+  tools/out/extflash_tone_0916.bin / .res
+  tools/out/extflash_ALL_tone0916_ui0902.res
   project/inc/ExtFlash_Tone_Addr.h
-  Doc/音色文件/0915/FLASH_MAP.txt
+  Doc/音色文件/0916_bank/FLASH_MAP.txt
 """
 from __future__ import annotations
 
@@ -25,7 +25,7 @@ from pathlib import Path
 ROOT = Path(__file__).resolve().parents[1]  # firmware project root
 REPO = ROOT.parent.parent  # 一诺国际吉他
 OUT_DIR = ROOT / "tools" / "out"
-TONE_TAG = "0915"
+TONE_TAG = "0916"
 OUT_BIN = OUT_DIR / f"extflash_tone_{TONE_TAG}.bin"
 OUT_RES = OUT_DIR / f"extflash_tone_{TONE_TAG}.res"
 OUT_ALL_RES = OUT_DIR / f"extflash_ALL_tone{TONE_TAG}_ui0902.res"
@@ -34,11 +34,10 @@ OUT_BIN_LEGACY = OUT_DIR / "extflash_tone_0903.bin"
 OUT_RES_LEGACY = OUT_DIR / "extflash_tone_0903.res"
 OUT_ALL_LEGACY = OUT_DIR / "extflash_ALL_tone0903_ui0902.res"
 OUT_HDR = ROOT / "project" / "inc" / "ExtFlash_Tone_Addr.h"
-OUT_MAP = REPO / "Doc" / "音色文件" / TONE_TAG / "FLASH_MAP.txt"
+TONE_DIR = REPO / "Doc" / "音色文件" / "0916_bank"
+OUT_MAP = TONE_DIR / "FLASH_MAP.txt"
 UI0902_BIN = OUT_DIR / "ui0902_res.bin"
 
-TONE_DIR = REPO / "Doc" / "音色文件" / TONE_TAG
-
 OFF_LOGO = 0x00000000
 OFF_CHARGING = 0x0000CB70
 OFF_BIN1 = 0x0001B8F0
@@ -164,7 +163,7 @@ def main() -> None:
 #define EXTFLASH_TONE_RES_VER           "{TONE_TAG}"
 #define EXTFLASH_TONE_RES_VER_MAJOR     0
 #define EXTFLASH_TONE_RES_VER_MINOR     9
-#define EXTFLASH_TONE_RES_VER_PATCH     15
+#define EXTFLASH_TONE_RES_VER_PATCH     16
 
 #define EXTFLASH_LOGO_ADDR              0x{by_name['LOGO'][1]:08X}UL
 #define EXTFLASH_LOGO_SIZE              {by_name['LOGO'][2]}UL
diff --git a/tools/publish_k1_release.py b/tools/publish_k1_release.py
index a138617..8d4e74e 100644
--- a/tools/publish_k1_release.py
+++ b/tools/publish_k1_release.py
@@ -30,10 +30,10 @@ BOOT_BIN = (
     / "Exe"
     / "AT32F403ARCT7_BOOT.bin"
 )
-TONE_RES_VER = "0915"
+TONE_RES_VER = "0916"
 TONE_BIN = PROJ / "tools" / "out" / f"extflash_tone_{TONE_RES_VER}.bin"
 UI0902_BIN = PROJ / "tools" / "out" / "ui0902_res.bin"
-MAP_TXT = REPO / "Doc" / "音色文件" / TONE_RES_VER / "FLASH_MAP.txt"
+MAP_TXT = REPO / "Doc" / "音色文件" / "0916_bank" / "FLASH_MAP.txt"
 TONE_HDR = PROJ / "project" / "inc" / "ExtFlash_Tone_Addr.h"
 IAP_DIR = REPO / "升级" / "MCU主控升级"
 OUT_ROOT = REPO / "tools" / "out"
@@ -91,7 +91,7 @@ def verify_tone_layout(tone: bytes, check_sources: bool = True) -> None:
     """Refuse to ship ALL.res if logo/charg/1/2/3.bin missing, shifted, or mismatch."""
     dab = b"\xABDAB"
     addrs = read_tone_addrs()
-    tone_dir = REPO / "Doc" / "音色文件" / TONE_RES_VER
+    tone_dir = REPO / "Doc" / "音色文件" / "0916_bank"
     ziliao = None
     for p in REPO.iterdir():
         if p.is_dir() and (p / "logo.bin").is_file() and (p / "Charg.bin").is_file():