diff --git "a/test/e2e/__snapshots__/test_openapi/test_OpenAPI\343\201\256\345\275\242\343\201\214\345\244\211\343\202\217\343\201\243\343\201\246\343\201\204\343\201\252\343\201\204\343\201\223\343\201\250\343\202\222\347\242\272\350\252\215.json" "b/test/e2e/__snapshots__/test_openapi/test_OpenAPI\343\201\256\345\275\242\343\201\214\345\244\211\343\202\217\343\201\243\343\201\246\343\201\204\343\201\252\343\201\204\343\201\223\343\201\250\343\202\222\347\242\272\350\252\215.json"
index c7eea4c58..9994e9e69 100644
--- "a/test/e2e/__snapshots__/test_openapi/test_OpenAPI\343\201\256\345\275\242\343\201\214\345\244\211\343\202\217\343\201\243\343\201\246\343\201\204\343\201\252\343\201\204\343\201\223\343\201\250\343\202\222\347\242\272\350\252\215.json"
+++ "b/test/e2e/__snapshots__/test_openapi/test_OpenAPI\343\201\256\345\275\242\343\201\214\345\244\211\343\202\217\343\201\243\343\201\246\343\201\204\343\201\252\343\201\204\343\201\223\343\201\250\343\202\222\347\242\272\350\252\215.json"
@@ -155,6 +155,22 @@
         "title": "Body_setting_post_setting_post",
         "type": "object"
       },
+      "Body_sing_frame_volume_sing_frame_volume_post": {
+        "properties": {
+          "frame_audio_query": {
+            "$ref": "#/components/schemas/FrameAudioQuery"
+          },
+          "score": {
+            "$ref": "#/components/schemas/Score"
+          }
+        },
+        "required": [
+          "score",
+          "frame_audio_query"
+        ],
+        "title": "Body_sing_frame_volume_sing_frame_volume_post",
+        "type": "object"
+      },
       "CorsPolicyMode": {
         "description": "CORSの許可モード",
         "enum": [
@@ -2331,6 +2347,71 @@
         ]
       }
     },
+    "/sing_frame_volume": {
+      "post": {
+        "operationId": "sing_frame_volume_sing_frame_volume_post",
+        "parameters": [
+          {
+            "in": "query",
+            "name": "speaker",
+            "required": true,
+            "schema": {
+              "title": "Speaker",
+              "type": "integer"
+            }
+          },
+          {
+            "in": "query",
+            "name": "core_version",
+            "required": false,
+            "schema": {
+              "title": "Core Version",
+              "type": "string"
+            }
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/Body_sing_frame_volume_sing_frame_volume_post"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "items": {
+                    "type": "number"
+                  },
+                  "title": "Response Sing Frame Volume Sing Frame Volume Post",
+                  "type": "array"
+                }
+              }
+            },
+            "description": "Successful Response"
+          },
+          "422": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/HTTPValidationError"
+                }
+              }
+            },
+            "description": "Validation Error"
+          }
+        },
+        "summary": "スコア・歌唱音声合成用のクエリからフレームごとの音量を得る",
+        "tags": [
+          "クエリ編集"
+        ]
+      }
+    },
     "/singer_info": {
       "get": {
         "description": "指定されたspeaker_uuidに関する情報をjson形式で返します。\n画像や音声はbase64エンコードされたものが返されます。",
diff --git a/test/e2e/single_api/__snapshots__/test_sing_frame_volume/test_post_sing_frame_volume_200.json b/test/e2e/single_api/__snapshots__/test_sing_frame_volume/test_post_sing_frame_volume_200.json
new file mode 100644
index 000000000..d5b255fbc
--- /dev/null
+++ b/test/e2e/single_api/__snapshots__/test_sing_frame_volume/test_post_sing_frame_volume_200.json
@@ -0,0 +1,167 @@
+[
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.85,
+  0.95,
+  2.63,
+  2.73,
+  2.77,
+  2.73,
+  2.7,
+  2.67,
+  2.67,
+  2.68,
+  2.69,
+  2.72,
+  2.76,
+  2.8,
+  2.84,
+  2.86,
+  2.89,
+  2.92,
+  2.97,
+  3.01,
+  3.05,
+  3.06,
+  3.07,
+  3.07,
+  3.07,
+  3.07,
+  3.07,
+  3.06,
+  3.04,
+  3.03,
+  3.02,
+  3.02,
+  3.03,
+  3.04,
+  3.05,
+  3.05,
+  3.05,
+  3.05,
+  3.05,
+  3.05,
+  3.06,
+  3.07,
+  3.08,
+  3.51,
+  3.51,
+  3.58,
+  3.67,
+  1.6,
+  1.64,
+  1.67,
+  1.68,
+  1.68,
+  1.68,
+  1.68,
+  1.67,
+  1.65,
+  1.64,
+  1.62,
+  1.61,
+  1.61,
+  1.61,
+  1.61,
+  1.62,
+  1.63,
+  1.64,
+  1.65,
+  1.66,
+  1.66,
+  1.66,
+  1.67,
+  1.67,
+  1.68,
+  1.68,
+  1.67,
+  1.67,
+  1.66,
+  1.66,
+  1.66,
+  1.66,
+  1.67,
+  1.67,
+  1.67,
+  1.67,
+  1.67,
+  1.67,
+  1.66,
+  1.63,
+  3.03,
+  3.04,
+  3.06,
+  3.07,
+  3.11,
+  2.63,
+  2.71,
+  2.73,
+  2.76,
+  2.79,
+  2.83,
+  2.85,
+  2.85,
+  2.83,
+  2.8,
+  2.77,
+  2.77,
+  2.78,
+  2.79,
+  2.81,
+  2.82,
+  2.84,
+  2.87,
+  2.9,
+  2.94,
+  2.96,
+  2.97,
+  2.96,
+  2.94,
+  2.91,
+  2.87,
+  2.83,
+  2.79,
+  2.78,
+  2.78,
+  2.79,
+  2.82,
+  2.84,
+  2.87,
+  2.9,
+  2.92,
+  2.93,
+  2.94,
+  2.94,
+  2.92,
+  2.87,
+  2.77,
+  2.7,
+  2.75,
+  2.78,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0,
+  0.0
+]
diff --git a/test/e2e/single_api/test_sing_frame_volume.py b/test/e2e/single_api/test_sing_frame_volume.py
new file mode 100644
index 000000000..2b85faa4a
--- /dev/null
+++ b/test/e2e/single_api/test_sing_frame_volume.py
@@ -0,0 +1,381 @@
+"""
+/sing_frame_audio_query API のテスト
+"""
+
+from test.utility import round_floats
+
+from fastapi.testclient import TestClient
+from syrupy.assertion import SnapshotAssertion
+
+
+def test_post_sing_frame_volume_200(
+    client: TestClient, snapshot_json: SnapshotAssertion
+) -> None:
+    score = {
+        "notes": [
+            {"key": None, "frame_length": 15, "lyric": ""},
+            {"key": 60, "frame_length": 45, "lyric": "ド"},
+            {"key": 62, "frame_length": 45, "lyric": "レ"},
+            {"key": 64, "frame_length": 45, "lyric": "ミ"},
+            {"key": None, "frame_length": 15, "lyric": ""},
+        ]
+    }
+
+    frame_audio_query = {
+        "f0": [
+            203.12020874023438,
+            203.22958374023438,
+            203.18966674804688,
+            203.2109832763672,
+            203.19461059570312,
+            203.1883087158203,
+            203.20797729492188,
+            203.20526123046875,
+            203.19091796875,
+            203.1884002685547,
+            203.28414916992188,
+            203.3013153076172,
+            202.45860290527344,
+            183.76019287109375,
+            204.18850708007812,
+            226.11729431152344,
+            234.71311950683594,
+            237.92971801757812,
+            235.15191650390625,
+            231.90707397460938,
+            229.99266052246094,
+            229.66290283203125,
+            230.2884063720703,
+            231.7293243408203,
+            234.10093688964844,
+            237.48324584960938,
+            241.1653289794922,
+            244.013916015625,
+            246.09280395507812,
+            248.35073852539062,
+            251.46533203125,
+            255.3215789794922,
+            259.22845458984375,
+            262.0407409667969,
+            263.4653015136719,
+            264.0202941894531,
+            264.0643615722656,
+            264.0140075683594,
+            264.18475341796875,
+            264.071533203125,
+            263.0423889160156,
+            261.5002746582031,
+            260.30755615234375,
+            259.74737548828125,
+            259.97265625,
+            260.8736877441406,
+            261.92633056640625,
+            262.47418212890625,
+            262.64044189453125,
+            262.7281188964844,
+            262.550537109375,
+            262.14971923828125,
+            262.1888732910156,
+            262.9635009765625,
+            264.0044250488281,
+            265.0442810058594,
+            265.5814514160156,
+            266.043701171875,
+            270.6605224609375,
+            278.0888366699219,
+            286.00537109375,
+            292.86920166015625,
+            297.3049621582031,
+            299.27734375,
+            300.3929443359375,
+            300.6061706542969,
+            299.57958984375,
+            297.44024658203125,
+            294.6528015136719,
+            291.82952880859375,
+            289.404052734375,
+            287.65704345703125,
+            286.74700927734375,
+            286.7215881347656,
+            287.2806091308594,
+            288.5699462890625,
+            290.4000244140625,
+            292.43536376953125,
+            294.1000061035156,
+            295.3788146972656,
+            296.26678466796875,
+            296.9929504394531,
+            297.8184509277344,
+            298.62176513671875,
+            299.185302734375,
+            299.1925964355469,
+            298.5477294921875,
+            297.5537109375,
+            296.7957458496094,
+            296.4950256347656,
+            296.5893249511719,
+            297.08233642578125,
+            297.6444091796875,
+            298.2401123046875,
+            298.5912780761719,
+            298.34576416015625,
+            297.736083984375,
+            297.81304931640625,
+            297.0906982421875,
+            291.0978088378906,
+            281.9891357421875,
+            282.7239990234375,
+            285.04388427734375,
+            285.44024658203125,
+            289.8936767578125,
+            303.32220458984375,
+            312.589599609375,
+            314.6080322265625,
+            317.6407470703125,
+            321.5991516113281,
+            325.74896240234375,
+            327.905517578125,
+            328.0322265625,
+            326.0955505371094,
+            322.309326171875,
+            319.3800354003906,
+            319.07257080078125,
+            319.984130859375,
+            321.45501708984375,
+            323.28179931640625,
+            325.30828857421875,
+            327.5245361328125,
+            330.62957763671875,
+            334.59619140625,
+            338.2353515625,
+            340.77130126953125,
+            341.728759765625,
+            340.83551025390625,
+            338.66802978515625,
+            335.49774169921875,
+            330.9483642578125,
+            325.6497497558594,
+            321.55267333984375,
+            319.8941345214844,
+            320.3050231933594,
+            322.0650634765625,
+            324.57373046875,
+            327.59454345703125,
+            330.9676208496094,
+            334.1003723144531,
+            336.59857177734375,
+            338.0997314453125,
+            338.8575134277344,
+            338.69305419921875,
+            336.66839599609375,
+            330.25885009765625,
+            319.44140625,
+            311.1017150878906,
+            316.9340515136719,
+            319.87322998046875,
+            305.58660888671875,
+            298.75933837890625,
+            309.8575134277344,
+            314.0906066894531,
+            316.8128662109375,
+            333.0500793457031,
+            355.0403747558594,
+            355.17584228515625,
+            355.1917724609375,
+            355.20037841796875,
+            355.1678771972656,
+            355.1257019042969,
+            355.2730712890625,
+            355.0054931640625,
+            354.0846252441406,
+        ],
+        "volume": [
+            0.0004787147045135498,
+            0.0010405704379081726,
+            0.0014588013291358948,
+            0.0012274235486984253,
+            0.0010905563831329346,
+            0.0009400248527526855,
+            0.0009405165910720825,
+            0.0006652474403381348,
+            0.0002709329128265381,
+            -0.0002336353063583374,
+            -0.0002986416220664978,
+            0.0005924627184867859,
+            0.003974780440330505,
+            0.017938457429409027,
+            0.039812393486499786,
+            0.0595753975212574,
+            0.08433514088392258,
+            0.09954013675451279,
+            0.10054653882980347,
+            0.0972367525100708,
+            0.09018714725971222,
+            0.0851733461022377,
+            0.07580415159463882,
+            0.06871049106121063,
+            0.06137121468782425,
+            0.05629901587963104,
+            0.05338696017861366,
+            0.05235457420349121,
+            0.052907101809978485,
+            0.05187157168984413,
+            0.05293390154838562,
+            0.05417793244123459,
+            0.05544605106115341,
+            0.05646364018321037,
+            0.05738266557455063,
+            0.05892559885978699,
+            0.05947083234786987,
+            0.05872538313269615,
+            0.0584573820233345,
+            0.05720439925789833,
+            0.05803307890892029,
+            0.05679874122142792,
+            0.05562245100736618,
+            0.05525610223412514,
+            0.05318000912666321,
+            0.05259035527706146,
+            0.05080951377749443,
+            0.05003567039966583,
+            0.0496600866317749,
+            0.04906811937689781,
+            0.04923130199313164,
+            0.04877219721674919,
+            0.0484158918261528,
+            0.048542704433202744,
+            0.04962582886219025,
+            0.045066948980093,
+            0.037152379751205444,
+            0.03356718644499779,
+            0.036367204040288925,
+            0.05020733177661896,
+            0.06368612498044968,
+            0.07467876374721527,
+            0.07978153228759766,
+            0.08049686998128891,
+            0.0795092061161995,
+            0.07859177887439728,
+            0.07510609179735184,
+            0.07104776799678802,
+            0.06727584451436996,
+            0.06365916877985,
+            0.06015634536743164,
+            0.058127306401729584,
+            0.05694492161273956,
+            0.05727839097380638,
+            0.05793873220682144,
+            0.06043902784585953,
+            0.06278379261493683,
+            0.06741152703762054,
+            0.06920691579580307,
+            0.07085863500833511,
+            0.0709768608212471,
+            0.07126042246818542,
+            0.07135792076587677,
+            0.07060225307941437,
+            0.0693637952208519,
+            0.06815081089735031,
+            0.06793922185897827,
+            0.06794025748968124,
+            0.06763045489788055,
+            0.06797683238983154,
+            0.0699392557144165,
+            0.07168693840503693,
+            0.07338269054889679,
+            0.07539191842079163,
+            0.07654494792222977,
+            0.07708939164876938,
+            0.07883097976446152,
+            0.08011248707771301,
+            0.0797126516699791,
+            0.07450003921985626,
+            0.06884774565696716,
+            0.0707208514213562,
+            0.08004502952098846,
+            0.09337422251701355,
+            0.1131061464548111,
+            0.13021202385425568,
+            0.14446872472763062,
+            0.14968127012252808,
+            0.15179219841957092,
+            0.14891058206558228,
+            0.1466791033744812,
+            0.14219200611114502,
+            0.1366046965122223,
+            0.12968313694000244,
+            0.12211640924215317,
+            0.11668159067630768,
+            0.11206194758415222,
+            0.10870714485645294,
+            0.10816323757171631,
+            0.11024853587150574,
+            0.11374224722385406,
+            0.12013312429189682,
+            0.12631694972515106,
+            0.1320280134677887,
+            0.13775652647018433,
+            0.14057473838329315,
+            0.14202912151813507,
+            0.13998106122016907,
+            0.1357124000787735,
+            0.12879544496536255,
+            0.11972789466381073,
+            0.10934856534004211,
+            0.10000964999198914,
+            0.09129352122545242,
+            0.08448395133018494,
+            0.07895656675100327,
+            0.07746186852455139,
+            0.07585690915584564,
+            0.07549901306629181,
+            0.0747423842549324,
+            0.07375279814004898,
+            0.0723096951842308,
+            0.06903150677680969,
+            0.06309784948825836,
+            0.05319780111312866,
+            0.043854743242263794,
+            0.03212194889783859,
+            0.020242862403392792,
+            0.010037116706371307,
+            0.003522723913192749,
+            0.001071922481060028,
+            0.00034518539905548096,
+            0.0006061941385269165,
+            0.0007827728986740112,
+            0.0006604194641113281,
+            0.0008484125137329102,
+            0.0013152658939361572,
+            0.00047776103019714355,
+            0.00029630959033966064,
+            0.0005781650543212891,
+            0.00028308480978012085,
+            0.00037220120429992676,
+            -8.973479270935059e-05,
+            0.0009073689579963684,
+            -0.001959472894668579,
+        ],
+        "phonemes": [
+            {"phoneme": "pau", "frame_length": 13},
+            {"phoneme": "d", "frame_length": 2},
+            {"phoneme": "o", "frame_length": 41},
+            {"phoneme": "r", "frame_length": 4},
+            {"phoneme": "e", "frame_length": 40},
+            {"phoneme": "m", "frame_length": 5},
+            {"phoneme": "i", "frame_length": 45},
+            {"phoneme": "pau", "frame_length": 15},
+        ],
+        "volumeScale": 1.0,
+        "outputSamplingRate": 24000,
+        "outputStereo": False,
+    }
+
+    response = client.post(
+        "/sing_frame_volume",
+        params={"speaker": 0},
+        json={"score": score, "frame_audio_query": frame_audio_query},
+    )
+    print(response.text)
+    assert response.status_code == 200
+    assert snapshot_json == round_floats(response.json(), 2)
diff --git a/voicevox_engine/app/routers/tts_pipeline.py b/voicevox_engine/app/routers/tts_pipeline.py
index 740bb817f..06c696f28 100644
--- a/voicevox_engine/app/routers/tts_pipeline.py
+++ b/voicevox_engine/app/routers/tts_pipeline.py
@@ -347,6 +347,23 @@ def sing_frame_audio_query(
             outputStereo=False,
         )
 
+    @router.post(
+        "/sing_frame_volume",
+        response_model=list[float],
+        tags=["クエリ編集"],
+        summary="スコア・歌唱音声合成用のクエリからフレームごとの音量を得る",
+    )
+    def sing_frame_volume(
+        score: Score,
+        frame_audio_query: FrameAudioQuery,
+        style_id: Annotated[StyleId, Query(alias="speaker")],
+        core_version: str | None = None,
+    ) -> list[float]:
+        engine = get_engine(core_version)
+        return engine.create_sing_volume_from_phoneme_and_f0(
+            score, frame_audio_query.phonemes, frame_audio_query.f0, style_id
+        )
+
     @router.post(
         "/frame_synthesis",
         response_class=FileResponse,
diff --git a/voicevox_engine/tts_pipeline/tts_engine.py b/voicevox_engine/tts_pipeline/tts_engine.py
index e9d2ed759..d3155da3d 100644
--- a/voicevox_engine/tts_pipeline/tts_engine.py
+++ b/voicevox_engine/tts_pipeline/tts_engine.py
@@ -9,7 +9,15 @@
 from ..core.core_adapter import CoreAdapter
 from ..core.core_wrapper import CoreWrapper
 from ..metas.Metas import StyleId
-from ..model import AccentPhrase, AudioQuery, FrameAudioQuery, FramePhoneme, Mora, Score
+from ..model import (
+    AccentPhrase,
+    AudioQuery,
+    FrameAudioQuery,
+    FramePhoneme,
+    Mora,
+    Note,
+    Score,
+)
 from .kana_converter import parse_kana
 from .mora_mapping import mora_kana_to_mora_phonemes, mora_phonemes_to_mora_kana
 from .phoneme import Phoneme
@@ -286,6 +294,104 @@ def calc_phoneme_lengths(
     return phoneme_durations_array
 
 
+def notes_to_keys_and_phonemes(
+    notes: list[Note],
+) -> tuple[
+    NDArray[np.int64],
+    NDArray[np.int64],
+    NDArray[np.int64],
+    NDArray[np.int64],
+    NDArray[np.int64],
+]:
+    """
+    ノート単位の長さ・モーラ情報や、音素列・音素ごとのキー列を作成する
+    Parameters
+    ----------
+    notes : list[Note]
+        ノート列
+    Returns
+    -------
+    note_lengths : NDArray[np.int64]
+        ノートの長さ列
+    note_consonants : NDArray[np.int64]
+        ノートの子音ID列
+    note_vowels : NDArray[np.int64]
+        ノートの母音ID列
+    phonemes : NDArray[np.int64]
+        音素列
+    phoneme_keys : NDArray[np.int64]
+        音素ごとのキー列
+    """
+
+    note_lengths: list[int] = []
+    note_consonants: list[int] = []
+    note_vowels: list[int] = []
+    phonemes: list[int] = []
+    phoneme_keys: list[int] = []
+
+    for note in notes:
+        if note.lyric == "":
+            if note.key is not None:
+                raise HTTPException(
+                    status_code=400,
+                    detail="lyricが空文字列の場合、keyはnullである必要があります。",
+                )
+            note_lengths.append(note.frame_length)
+            note_consonants.append(-1)
+            note_vowels.append(0)  # pau
+            phonemes.append(0)  # pau
+            phoneme_keys.append(-1)
+        else:
+            if note.key is None:
+                raise HTTPException(
+                    status_code=400,
+                    detail="keyがnullの場合、lyricは空文字列である必要があります。",
+                )
+
+            # TODO: 1ノートに複数のモーラがある場合の処理
+            mora_phonemes = mora_kana_to_mora_phonemes.get(
+                note.lyric  # type: ignore
+            ) or mora_kana_to_mora_phonemes.get(
+                _hira_to_kana(note.lyric)  # type: ignore
+            )
+            if mora_phonemes is None:
+                raise HTTPException(
+                    status_code=400,
+                    detail=f"lyricが不正です: {note.lyric}",
+                )
+
+            consonant, vowel = mora_phonemes
+            if consonant is None:
+                consonant_id = -1
+            else:
+                consonant_id = Phoneme(consonant).id
+            vowel_id = Phoneme(vowel).id
+
+            note_lengths.append(note.frame_length)
+            note_consonants.append(consonant_id)
+            note_vowels.append(vowel_id)
+            if consonant_id != -1:
+                phonemes.append(consonant_id)
+                phoneme_keys.append(note.key)
+            phonemes.append(vowel_id)
+            phoneme_keys.append(note.key)
+
+    # 各データをnumpy配列に変換する
+    note_lengths_array = np.array(note_lengths, dtype=np.int64)
+    note_consonants_array = np.array(note_consonants, dtype=np.int64)
+    note_vowels_array = np.array(note_vowels, dtype=np.int64)
+    phonemes_array = np.array(phonemes, dtype=np.int64)
+    phoneme_keys_array = np.array(phoneme_keys, dtype=np.int64)
+
+    return (
+        note_lengths_array,
+        note_consonants_array,
+        note_vowels_array,
+        phonemes_array,
+        phoneme_keys_array,
+    )
+
+
 def frame_query_to_sf_decoder_feature(
     query: FrameAudioQuery,
 ) -> tuple[NDArray[np.int64], NDArray[np.float32], NDArray[np.float32]]:
@@ -467,66 +573,13 @@ def create_sing_phoneme_and_f0_and_volume(
         """歌声合成用のスコア・スタイルIDに基づいてフレームごとの音素・音高・音量を生成する"""
         notes = score.notes
 
-        # Scoreを分解し、ノート単位のデータ、音素単位のデータを作成する
-        note_lengths: list[int] = []
-        note_consonants: list[int] = []
-        note_vowels: list[int] = []
-        phonemes: list[int] = []
-        phoneme_keys: list[int] = []
-
-        for note in notes:
-            if note.lyric == "":
-                if note.key is not None:
-                    raise HTTPException(
-                        status_code=400,
-                        detail="lyricが空文字列の場合、keyはnullである必要があります。",
-                    )
-                note_lengths.append(note.frame_length)
-                note_consonants.append(-1)
-                note_vowels.append(0)  # pau
-                phonemes.append(0)  # pau
-                phoneme_keys.append(-1)
-            else:
-                if note.key is None:
-                    raise HTTPException(
-                        status_code=400,
-                        detail="keyがnullの場合、lyricは空文字列である必要があります。",
-                    )
-
-                # TODO: 1ノートに複数のモーラがある場合の処理
-                mora_phonemes = mora_kana_to_mora_phonemes.get(
-                    note.lyric  # type: ignore
-                ) or mora_kana_to_mora_phonemes.get(
-                    _hira_to_kana(note.lyric)  # type: ignore
-                )
-                if mora_phonemes is None:
-                    raise HTTPException(
-                        status_code=400,
-                        detail=f"lyricが不正です: {note.lyric}",
-                    )
-
-                consonant, vowel = mora_phonemes
-                if consonant is None:
-                    consonant_id = -1
-                else:
-                    consonant_id = Phoneme(consonant).id
-                vowel_id = Phoneme(vowel).id
-
-                note_lengths.append(note.frame_length)
-                note_consonants.append(consonant_id)
-                note_vowels.append(vowel_id)
-                if consonant_id != -1:
-                    phonemes.append(consonant_id)
-                    phoneme_keys.append(note.key)
-                phonemes.append(vowel_id)
-                phoneme_keys.append(note.key)
-
-        # 各データをnumpy配列に変換する
-        note_lengths_array = np.array(note_lengths, dtype=np.int64)
-        note_consonants_array = np.array(note_consonants, dtype=np.int64)
-        note_vowels_array = np.array(note_vowels, dtype=np.int64)
-        phonemes_array = np.array(phonemes, dtype=np.int64)
-        phoneme_keys_array = np.array(phoneme_keys, dtype=np.int64)
+        (
+            note_lengths_array,
+            note_consonants_array,
+            note_vowels_array,
+            phonemes_array,
+            phoneme_keys_array,
+        ) = notes_to_keys_and_phonemes(notes)
 
         # コアを用いて子音長を生成する
         consonant_lengths = self._core.safe_predict_sing_consonant_length_forward(
@@ -556,11 +609,64 @@ def create_sing_phoneme_and_f0_and_volume(
                 phoneme=Phoneme._PHONEME_LIST[phoneme_id],
                 frame_length=phoneme_duration,
             )
-            for phoneme_id, phoneme_duration in zip(phonemes, phoneme_lengths)
+            for phoneme_id, phoneme_duration in zip(phonemes_array, phoneme_lengths)
         ]
 
         return phoneme_data_list, f0s.tolist(), volumes.tolist()
 
+    def create_sing_volume_from_phoneme_and_f0(
+        self,
+        score: Score,
+        phonemes: list[FramePhoneme],
+        f0s: list[float],
+        style_id: StyleId,
+    ) -> list[float]:
+        """歌声合成用の音素・音高・スタイルIDに基づいて音量を生成する"""
+        notes = score.notes
+
+        (
+            _,
+            _,
+            _,
+            phonemes_array_from_notes,
+            phoneme_keys_array,
+        ) = notes_to_keys_and_phonemes(notes)
+
+        phonemes_array = np.array(
+            [Phoneme(p.phoneme).id for p in phonemes], dtype=np.int64
+        )
+        phoneme_lengths = np.array([p.frame_length for p in phonemes], dtype=np.int64)
+        f0_array = np.array(f0s, dtype=np.float32)
+
+        # notesから生成した音素系列と、FrameAudioQueryが持つ音素系列が一致しているか確認
+        # この確認によって、phoneme_keys_arrayが使用可能かを間接的に確認する
+        try:
+            all_equals = np.all(phonemes_array == phonemes_array_from_notes)
+        except ValueError:
+            # 長さが異なる場合はValueErrorが発生するので、Falseとする
+            # mypyを通すためにnp.bool_でラップする
+            all_equals = np.bool_(False)
+
+        if not all_equals:
+            raise HTTPException(
+                status_code=400,
+                detail="Scoreから抽出した音素列とFrameAudioQueryから抽出した音素列が一致しません。",
+            )
+
+        # 時間スケールを変更する（音素 → フレーム）
+        frame_phonemes = np.repeat(phonemes_array, phoneme_lengths)
+        frame_keys = np.repeat(phoneme_keys_array, phoneme_lengths)
+
+        # コアを用いて音量を生成する
+        volumes = self._core.safe_predict_sing_volume_forward(
+            frame_phonemes, frame_keys, f0_array, style_id
+        )
+
+        # mypyの型チェックを通すために明示的に型を付ける
+        volume_list: list[float] = volumes.tolist()
+
+        return volume_list
+
     def frame_synthsize_wave(
         self,
         query: FrameAudioQuery,