add preserve pitch option (#972)

src/i18n/locales/en.json

@@ -705,6 +705,8 @@
         "volumeWidth_description": "the width of the volume slider",
         "webAudio": "use web audio",
         "webAudio_description": "use web audio. this enables advanced features like replaygain. disable if you experience otherwise",
+        "preservePitch": "preserve pitch",
+        "preservePitch_description": "preserves pitch when modifying playback speed",
         "windowBarStyle": "window bar style",
         "windowBarStyle_description": "select the style of the window bar",
         "zoom": "zoom percentage",

src/renderer/components/audio-player/index.tsx

@@ -120,6 +120,7 @@ export const AudioPlayer = forwardRef<AudioPlayerRef, AudioPlayerProps>((props,
     const audioDeviceId = useSettingsStore((state) => state.playback.audioDeviceId);
     const playback = useSettingsStore((state) => state.playback.mpvProperties);
     const shouldUseWebAudio = useSettingsStore((state) => state.playback.webAudio);
+    const preservesPitch = useSettingsStore((state) => state.playback.preservePitch);
     const { resetSampleRate } = useSettingsStoreActions();
     const playbackSpeed = useSpeed();
     const { transcode } = usePlaybackSettings();
@@ -230,21 +231,23 @@ export const AudioPlayer = forwardRef<AudioPlayerRef, AudioPlayerProps>((props,
                 // calling play() is not necessarily a safe option (https://developer.chrome.com/blog/play-request-was-interrupted)
                 // In practice, this failure is only likely to happen when using the 0-second wav:
                 // play() + play() in rapid succession will cause problems as the frist one ends the track.
-                player1Ref.current
-                    ?.getInternalPlayer()
-                    ?.play()
-                    .catch(() => {});
+                const internalPlayer = player1Ref.current?.getInternalPlayer();
+                if (internalPlayer) {
+                    internalPlayer.preservesPitch = preservesPitch;
+                    internalPlayer.play().catch(() => {});
+                }
             } else {
-                player2Ref.current
-                    ?.getInternalPlayer()
-                    ?.play()
-                    .catch(() => {});
+                const internalPlayer = player2Ref.current?.getInternalPlayer();
+                if (internalPlayer) {
+                    internalPlayer.preservesPitch = preservesPitch;
+                    internalPlayer.play().catch(() => {});
+                }
             }
         } else {
             player1Ref.current?.getInternalPlayer()?.pause();
             player2Ref.current?.getInternalPlayer()?.pause();
         }
-    }, [currentPlayer, status]);
+    }, [currentPlayer, status, preservesPitch]);
 
     const handleCrossfade1 = useCallback(
         (e: AudioPlayerProgress) => {

src/renderer/features/settings/components/playback/audio-settings.tsx

@@ -155,6 +155,26 @@ export const AudioSettings = ({ hasFancyAudio }: { hasFancyAudio: boolean }) =>
                 postProcess: 'sentenceCase',
             }),
         },
+        {
+            control: (
+                <Switch
+                    defaultChecked={settings.preservePitch}
+                    onChange={(e) => {
+                        setSettings({
+                            playback: { ...settings, preservePitch: e.currentTarget.checked },
+                        });
+                    }}
+                />
+            ),
+            description: t('setting.preservePitch', {
+                context: 'description',
+                postProcess: 'sentenceCase',
+            }),
+            isHidden: settings.type !== PlaybackType.WEB,
+            title: t('setting.preservePitch', {
+                postProcess: 'sentenceCase',
+            }),
+        },
         {
             control: (
                 <Slider

src/renderer/store/settings.store.ts

@@ -281,6 +281,7 @@ export interface SettingsState {
         mpvExtraParameters: string[];
         mpvProperties: MpvSettings;
         muted: boolean;
+        preservePitch: boolean;
         scrobble: {
             enabled: boolean;
             scrobbleAtDuration: number;
@@ -473,6 +474,7 @@ const initialState: SettingsState = {
             replayGainPreampDB: 0,
         },
         muted: false,
+        preservePitch: true,
         scrobble: {
             enabled: true,
             scrobbleAtDuration: 240,