diff --git a/src/components/Talk/AudioInfo.vue b/src/components/Talk/AudioInfo.vue
index 1d76ffd9b2..7f329ef1e2 100644
--- a/src/components/Talk/AudioInfo.vue
+++ b/src/components/Talk/AudioInfo.vue
@@ -308,6 +308,7 @@ import {
   MorphingInfo,
   Preset,
   PresetKey,
+  PresetSliderKey,
   Voice,
 } from "@/type/preload";
 import {
@@ -348,14 +349,12 @@ const selectedAudioKeys = computed(() =>
     : [props.activeAudioKey],
 );
 
-type ParameterKey = keyof Omit<Preset, "name" | "morphingInfo">; // NOTE: パラメーターの種類はPresetのキーと同じ
-
 /** パラメーターを制御するための元情報リスト */
 type ParameterConfig = {
   label: string;
   sliderProps: Omit<PreviewSliderHelperProps, "onChange">;
   onChange: PreviewSliderHelperProps["onChange"]; // NOTE: onChangeだけ使い回すので分離している
-  key: ParameterKey;
+  key: PresetSliderKey;
 };
 const parameterConfigs = computed<ParameterConfig[]>(() => [
   {
@@ -364,11 +363,11 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
       modelValue: () => query.value?.speedScale ?? null,
       disable: () =>
         uiLocked.value || !supportedFeatures.value?.adjustSpeedScale,
-      max: SLIDER_PARAMETERS.SPEED.max,
-      min: SLIDER_PARAMETERS.SPEED.min,
-      step: SLIDER_PARAMETERS.SPEED.step,
-      scrollStep: SLIDER_PARAMETERS.SPEED.scrollStep,
-      scrollMinStep: SLIDER_PARAMETERS.SPEED.scrollMinStep,
+      max: SLIDER_PARAMETERS.speedScale.max,
+      min: SLIDER_PARAMETERS.speedScale.min,
+      step: SLIDER_PARAMETERS.speedScale.step,
+      scrollStep: SLIDER_PARAMETERS.speedScale.scrollStep,
+      scrollMinStep: SLIDER_PARAMETERS.speedScale.scrollMinStep,
     },
     onChange: (speedScale: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_SPEED_SCALE({
@@ -383,10 +382,10 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
       modelValue: () => query.value?.pitchScale ?? null,
       disable: () =>
         uiLocked.value || !supportedFeatures.value?.adjustPitchScale,
-      max: SLIDER_PARAMETERS.PITCH.max,
-      min: SLIDER_PARAMETERS.PITCH.min,
-      step: SLIDER_PARAMETERS.PITCH.step,
-      scrollStep: SLIDER_PARAMETERS.PITCH.scrollStep,
+      max: SLIDER_PARAMETERS.pitchScale.max,
+      min: SLIDER_PARAMETERS.pitchScale.min,
+      step: SLIDER_PARAMETERS.pitchScale.step,
+      scrollStep: SLIDER_PARAMETERS.pitchScale.scrollStep,
     },
     onChange: (pitchScale: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_PITCH_SCALE({
@@ -401,11 +400,11 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
       modelValue: () => query.value?.intonationScale ?? null,
       disable: () =>
         uiLocked.value || !supportedFeatures.value?.adjustIntonationScale,
-      max: SLIDER_PARAMETERS.INTONATION.max,
-      min: SLIDER_PARAMETERS.INTONATION.min,
-      step: SLIDER_PARAMETERS.INTONATION.step,
-      scrollStep: SLIDER_PARAMETERS.INTONATION.scrollStep,
-      scrollMinStep: SLIDER_PARAMETERS.INTONATION.scrollMinStep,
+      max: SLIDER_PARAMETERS.intonationScale.max,
+      min: SLIDER_PARAMETERS.intonationScale.min,
+      step: SLIDER_PARAMETERS.intonationScale.step,
+      scrollStep: SLIDER_PARAMETERS.intonationScale.scrollStep,
+      scrollMinStep: SLIDER_PARAMETERS.intonationScale.scrollMinStep,
     },
     onChange: (intonationScale: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_INTONATION_SCALE({
@@ -420,11 +419,11 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
       modelValue: () => query.value?.volumeScale ?? null,
       disable: () =>
         uiLocked.value || !supportedFeatures.value?.adjustVolumeScale,
-      max: SLIDER_PARAMETERS.VOLUME.max,
-      min: SLIDER_PARAMETERS.VOLUME.min,
-      step: SLIDER_PARAMETERS.VOLUME.step,
-      scrollStep: SLIDER_PARAMETERS.VOLUME.scrollStep,
-      scrollMinStep: SLIDER_PARAMETERS.VOLUME.scrollMinStep,
+      max: SLIDER_PARAMETERS.volumeScale.max,
+      min: SLIDER_PARAMETERS.volumeScale.min,
+      step: SLIDER_PARAMETERS.volumeScale.step,
+      scrollStep: SLIDER_PARAMETERS.volumeScale.scrollStep,
+      scrollMinStep: SLIDER_PARAMETERS.volumeScale.scrollMinStep,
     },
     onChange: (volumeScale: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_VOLUME_SCALE({
@@ -439,11 +438,11 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
       modelValue: () => query.value?.pauseLengthScale ?? null,
       disable: () =>
         uiLocked.value || !supportedFeatures.value?.adjustPauseLength,
-      max: SLIDER_PARAMETERS.PAUSE_LENGTH_SCALE.max,
-      min: SLIDER_PARAMETERS.PAUSE_LENGTH_SCALE.min,
-      step: SLIDER_PARAMETERS.PAUSE_LENGTH_SCALE.step,
-      scrollStep: SLIDER_PARAMETERS.PAUSE_LENGTH_SCALE.scrollStep,
-      scrollMinStep: SLIDER_PARAMETERS.PAUSE_LENGTH_SCALE.scrollMinStep,
+      max: SLIDER_PARAMETERS.pauseLengthScale.max,
+      min: SLIDER_PARAMETERS.pauseLengthScale.min,
+      step: SLIDER_PARAMETERS.pauseLengthScale.step,
+      scrollStep: SLIDER_PARAMETERS.pauseLengthScale.scrollStep,
+      scrollMinStep: SLIDER_PARAMETERS.pauseLengthScale.scrollMinStep,
     },
     onChange: (pauseLengthScale: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_PAUSE_LENGTH_SCALE({
@@ -457,11 +456,11 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
     sliderProps: {
       modelValue: () => query.value?.prePhonemeLength ?? null,
       disable: () => uiLocked.value,
-      max: SLIDER_PARAMETERS.PRE_PHONEME_LENGTH.max,
-      min: SLIDER_PARAMETERS.PRE_PHONEME_LENGTH.min,
-      step: SLIDER_PARAMETERS.PRE_PHONEME_LENGTH.step,
-      scrollStep: SLIDER_PARAMETERS.PRE_PHONEME_LENGTH.scrollStep,
-      scrollMinStep: SLIDER_PARAMETERS.PRE_PHONEME_LENGTH.scrollMinStep,
+      max: SLIDER_PARAMETERS.prePhonemeLength.max,
+      min: SLIDER_PARAMETERS.prePhonemeLength.min,
+      step: SLIDER_PARAMETERS.prePhonemeLength.step,
+      scrollStep: SLIDER_PARAMETERS.prePhonemeLength.scrollStep,
+      scrollMinStep: SLIDER_PARAMETERS.prePhonemeLength.scrollMinStep,
     },
     onChange: (prePhonemeLength: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_PRE_PHONEME_LENGTH({
@@ -475,11 +474,11 @@ const parameterConfigs = computed<ParameterConfig[]>(() => [
     sliderProps: {
       modelValue: () => query.value?.postPhonemeLength ?? null,
       disable: () => uiLocked.value,
-      max: SLIDER_PARAMETERS.POST_PHONEME_LENGTH.max,
-      min: SLIDER_PARAMETERS.POST_PHONEME_LENGTH.min,
-      step: SLIDER_PARAMETERS.POST_PHONEME_LENGTH.step,
-      scrollStep: SLIDER_PARAMETERS.POST_PHONEME_LENGTH.scrollStep,
-      scrollMinStep: SLIDER_PARAMETERS.POST_PHONEME_LENGTH.scrollMinStep,
+      max: SLIDER_PARAMETERS.postPhonemeLength.max,
+      min: SLIDER_PARAMETERS.postPhonemeLength.min,
+      step: SLIDER_PARAMETERS.postPhonemeLength.step,
+      scrollStep: SLIDER_PARAMETERS.postPhonemeLength.scrollStep,
+      scrollMinStep: SLIDER_PARAMETERS.postPhonemeLength.scrollMinStep,
     },
     onChange: (postPhonemeLength: number) =>
       store.actions.COMMAND_MULTI_SET_AUDIO_POST_PHONEME_LENGTH({
@@ -495,7 +494,7 @@ type Parameter = {
   label: string;
   slider: PreviewSliderHelper;
   onChange: PreviewSliderHelperProps["onChange"];
-  key: ParameterKey;
+  key: PresetSliderKey;
 };
 const parameters = computed<Parameter[]>(() =>
   parameterConfigs.value.map((parameterConfig) => ({
@@ -665,11 +664,11 @@ const morphingRateSlider = previewSliderHelper({
   modelValue: () => audioItem.value.morphingInfo?.rate ?? null,
   disable: () => uiLocked.value,
   onChange: setMorphingRate,
-  max: SLIDER_PARAMETERS.MORPHING_RATE.max,
-  min: SLIDER_PARAMETERS.MORPHING_RATE.min,
-  step: SLIDER_PARAMETERS.MORPHING_RATE.step,
-  scrollStep: SLIDER_PARAMETERS.MORPHING_RATE.scrollStep,
-  scrollMinStep: SLIDER_PARAMETERS.MORPHING_RATE.scrollMinStep,
+  max: SLIDER_PARAMETERS.morphingRate.max,
+  min: SLIDER_PARAMETERS.morphingRate.min,
+  step: SLIDER_PARAMETERS.morphingRate.step,
+  scrollStep: SLIDER_PARAMETERS.morphingRate.scrollStep,
+  scrollMinStep: SLIDER_PARAMETERS.morphingRate.scrollMinStep,
 });
 
 // プリセット
diff --git a/src/store/utility.ts b/src/store/utility.ts
index 5f0ac52677..3334fa44fd 100644
--- a/src/store/utility.ts
+++ b/src/store/utility.ts
@@ -1,6 +1,7 @@
 import * as diff from "fast-array-diff";
 import {
   CharacterInfo,
+  PresetSliderKey,
   StyleInfo,
   StyleType,
   ToolbarButtonTagType,
@@ -40,14 +41,23 @@ export function sanitizeFileName(fileName: string): string {
   return fileName.replace(sanitizer, "");
 }
 
+type SliderParameter = {
+  max: () => number;
+  min: () => number;
+  step: () => number;
+  scrollStep: () => number;
+  scrollMinStep?: () => number;
+};
+
 /**
  * AudioInfoコンポーネントに表示されるパラメータ
+ * TODO: src/domain/talk.ts辺りに切り出す
  */
-export const SLIDER_PARAMETERS = {
+export const SLIDER_PARAMETERS: Record<PresetSliderKey, SliderParameter> = {
   /**
    * 話速パラメータの定義
    */
-  SPEED: {
+  speedScale: {
     max: () => 2,
     min: () => 0.5,
     step: () => 0.01,
@@ -57,7 +67,7 @@ export const SLIDER_PARAMETERS = {
   /**
    * 音高パラメータの定義
    */
-  PITCH: {
+  pitchScale: {
     max: () => 0.15,
     min: () => -0.15,
     step: () => 0.01,
@@ -66,7 +76,7 @@ export const SLIDER_PARAMETERS = {
   /**
    *  抑揚パラメータの定義
    */
-  INTONATION: {
+  intonationScale: {
     max: () => 2,
     min: () => 0,
     step: () => 0.01,
@@ -76,7 +86,7 @@ export const SLIDER_PARAMETERS = {
   /**
    *  音量パラメータの定義
    */
-  VOLUME: {
+  volumeScale: {
     max: () => 2,
     min: () => 0,
     step: () => 0.01,
@@ -84,19 +94,19 @@ export const SLIDER_PARAMETERS = {
     scrollMinStep: () => 0.01,
   },
   /**
-   *  開始無音パラメータの定義
+   *  文内無音(倍率)パラメータの定義
    */
-  PRE_PHONEME_LENGTH: {
-    max: () => 1.5,
+  pauseLengthScale: {
+    max: () => 2,
     min: () => 0,
     step: () => 0.01,
     scrollStep: () => 0.1,
     scrollMinStep: () => 0.01,
   },
   /**
-   *  終了無音パラメータの定義
+   *  開始無音パラメータの定義
    */
-  POST_PHONEME_LENGTH: {
+  prePhonemeLength: {
     max: () => 1.5,
     min: () => 0,
     step: () => 0.01,
@@ -104,10 +114,10 @@ export const SLIDER_PARAMETERS = {
     scrollMinStep: () => 0.01,
   },
   /**
-   *  文内無音(倍率)パラメータの定義
+   *  終了無音パラメータの定義
    */
-  PAUSE_LENGTH_SCALE: {
-    max: () => 2,
+  postPhonemeLength: {
+    max: () => 1.5,
     min: () => 0,
     step: () => 0.01,
     scrollStep: () => 0.1,
@@ -116,7 +126,7 @@ export const SLIDER_PARAMETERS = {
   /**
    *  モーフィングレートパラメータの定義
    */
-  MORPHING_RATE: {
+  morphingRate: {
     max: () => 1,
     min: () => 0,
     step: () => 0.01,
diff --git a/src/type/preload.ts b/src/type/preload.ts
index 7c53a25b0e..24e4afc361 100644
--- a/src/type/preload.ts
+++ b/src/type/preload.ts
@@ -271,6 +271,9 @@ export type Preset = {
   postPhonemeLength: number;
   morphingInfo?: MorphingInfo;
 };
+export type PresetSliderKey =
+  | keyof Omit<Preset, "name" | "morphingInfo">
+  | "morphingRate";
 
 export type MorphingInfo = {
   rate: number;