diff --git a/Sources/MusicAssistantCore/Domain/SongProject.swift b/Sources/MusicAssistantCore/Domain/SongProject.swift
index 41de062..ae86459 100644
--- a/Sources/MusicAssistantCore/Domain/SongProject.swift
+++ b/Sources/MusicAssistantCore/Domain/SongProject.swift
@@ -154,6 +154,38 @@ public extension SongProject {
         dialects.removeAll { $0.id == dialectID }
     }
 
+    mutating func setBPMManually(_ value: Int) {
+        bpm = ManualAutoValue(mode: .manual, value: value)
+    }
+
+    mutating func setBPMAutomatic() {
+        bpm = ManualAutoValue(mode: .auto)
+    }
+
+    mutating func setKeyManually(_ value: String) {
+        key = ManualAutoValue(mode: .manual, value: value)
+    }
+
+    mutating func setKeyAutomatic() {
+        key = ManualAutoValue(mode: .auto)
+    }
+
+    mutating func setScaleManually(_ value: String) {
+        scale = ManualAutoValue(mode: .manual, value: value)
+    }
+
+    mutating func setScaleAutomatic() {
+        scale = ManualAutoValue(mode: .auto)
+    }
+
+    mutating func setMaqamManually(_ value: String) {
+        maqam = ManualAutoValue(mode: .manual, value: value)
+    }
+
+    mutating func setMaqamAutomatic() {
+        maqam = ManualAutoValue(mode: .auto)
+    }
+
     var selectedInstrumentTracks: [InstrumentTrack] {
         instruments.filter(\.selected)
     }
diff --git a/Tests/MusicAssistantCoreTests/SongProjectModelTests.swift b/Tests/MusicAssistantCoreTests/SongProjectModelTests.swift
index 787b920..e96570a 100644
--- a/Tests/MusicAssistantCoreTests/SongProjectModelTests.swift
+++ b/Tests/MusicAssistantCoreTests/SongProjectModelTests.swift
@@ -279,4 +279,32 @@ final class SongProjectModelTests: XCTestCase {
         XCTAssertEqual(project.dialects(forLanguageID: arabic.id), [])
         XCTAssertEqual(project.languageIDs, ["english"])
     }
+
+    func testMusicalParametersSupportManualAndAutoModes() {
+        var project = SongProject(
+            id: "project-8",
+            title: "Musical Parameters",
+            idea: "Control tempo and harmony"
+        )
+
+        project.setBPMManually(104)
+        project.setKeyManually("D")
+        project.setScaleAutomatic()
+        project.setMaqamManually("Bayati")
+
+        XCTAssertEqual(project.bpm, ManualAutoValue(mode: .manual, value: 104))
+        XCTAssertEqual(project.key, ManualAutoValue(mode: .manual, value: "D"))
+        XCTAssertEqual(project.scale, ManualAutoValue(mode: .auto))
+        XCTAssertEqual(project.maqam, ManualAutoValue(mode: .manual, value: "Bayati"))
+
+        project.setBPMAutomatic()
+        project.setKeyAutomatic()
+        project.setScaleManually("minor")
+        project.setMaqamAutomatic()
+
+        XCTAssertEqual(project.bpm, ManualAutoValue(mode: .auto))
+        XCTAssertEqual(project.key, ManualAutoValue(mode: .auto))
+        XCTAssertEqual(project.scale, ManualAutoValue(mode: .manual, value: "minor"))
+        XCTAssertEqual(project.maqam, ManualAutoValue(mode: .auto))
+    }
 }
diff --git a/docs/TASKS.md b/docs/TASKS.md
index 51d64f3..d47972c 100644
--- a/docs/TASKS.md
+++ b/docs/TASKS.md
@@ -26,7 +26,7 @@ requirement is missing and blocks implementation, record it in
 -   [x] Model instruments, variants, roles and placements.
 -   [x] Model multiple vocalists and section assignments.
 -   [x] Model language/dialect and Arabic pronunciation settings.
--   [ ] Model BPM, key, scale and maqam with Manual/Auto state.
+-   [x] Model BPM, key, scale and maqam with Manual/Auto state.
 -   [ ] Model emotional arc and production directions.
 -   [ ] Add serialization tests.