Added a configurable Opus bitrate for audio transcription

app/MindWork AI Studio/Settings/DataModel/DataApp.cs

@@ -112,6 +112,11 @@ public sealed class DataApp(Expression<Func<Data, DataApp>>? configSelection = n
     /// </summary>
     public string UseTranscriptionProvider { get; set; } = ManagedConfiguration.Register(configSelection, n => n.UseTranscriptionProvider, string.Empty);
 
+    /// <summary>
+    /// The Opus bitrate used when normalizing uploaded audio/video for transcription.
+    /// </summary>
+    public TranscriptionOpusBitrate OpusBitrate { get; set; } = ManagedConfiguration.Register(configSelection, n => n.OpusBitrate, TranscriptionOpusBitrate.KBPS_128);
+
     /// <summary>
     /// The global keyboard shortcut for toggling voice recording.
     /// Uses Tauri's shortcut format, e.g., "CmdOrControl+1" (Cmd+1 on macOS, Ctrl+1 on Windows/Linux).

app/MindWork AI Studio/Settings/DataModel/TranscriptionOpusBitrate.cs

@@ -0,0 +1,9 @@
+namespace AIStudio.Settings.DataModel;
+
+public enum TranscriptionOpusBitrate
+{
+    KBPS_32,
+    KBPS_64,
+    KBPS_128,
+    KBPS_256,
+}

app/MindWork AI Studio/Settings/DataModel/TranscriptionOpusBitrateExtensions.cs

@@ -0,0 +1,26 @@
+using AIStudio.Tools.PluginSystem;
+
+namespace AIStudio.Settings.DataModel;
+
+public static class TranscriptionOpusBitrateExtensions
+{
+    private static string TB(string fallbackEN) => I18N.I.T(fallbackEN, typeof(TranscriptionOpusBitrateExtensions).Namespace, nameof(TranscriptionOpusBitrateExtensions));
+
+    public static string GetName(this TranscriptionOpusBitrate bitrate) => bitrate switch
+    {
+        TranscriptionOpusBitrate.KBPS_32 => TB("32 kbps (smallest upload, lowest accuracy)"),
+        TranscriptionOpusBitrate.KBPS_64 => TB("64 kbps"),
+        TranscriptionOpusBitrate.KBPS_128 => TB("128 kbps (recommended)"),
+        TranscriptionOpusBitrate.KBPS_256 => TB("256 kbps (largest upload, highest accuracy)"),
+        _ => TB("Unknown"),
+    };
+
+    public static uint GetBitsPerSecond(this TranscriptionOpusBitrate bitrate) => bitrate switch
+    {
+        TranscriptionOpusBitrate.KBPS_32 => 32_000,
+        TranscriptionOpusBitrate.KBPS_64 => 64_000,
+        TranscriptionOpusBitrate.KBPS_128 => 128_000,
+        TranscriptionOpusBitrate.KBPS_256 => 256_000,
+        _ => 32_000,
+    };
+}