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feat: Virtual loopback audio device for lossless inter-app routing #310

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d5e330b
feat: add virtual loopback audio device for lossless inter-app routing
cpupanic May 25, 2026
125ca95
Enhance FineTune Loopback Driver and Add Diagnostic Script
cpupanic May 26, 2026
94f0f94
feat: Add Audio Debugging Panel and Loopback Controls
cpupanic May 28, 2026
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150 changes: 142 additions & 8 deletions FineTune.xcodeproj/project.pbxproj
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,10 @@
79B1000B2F35000000000002 /* IOBluetooth.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 79B1000A2F35000000000001 /* IOBluetooth.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
79C80E5A2F12FF510021442B /* SnapshotTesting in Frameworks */ = {isa = PBXBuildFile; productRef = 79SNAP0012F0600000008D52A /* SnapshotTesting */; };
79FLUID0012F0600000008D52 /* FluidMenuBarExtra in Frameworks */ = {isa = PBXBuildFile; productRef = 79FLUID0022F0600000008D52 /* FluidMenuBarExtra */; };
79LB00012F50000000000001 /* FTLoopbackDriver.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 79LB00022F50000000000002 /* FTLoopbackDriver.cpp */; };
79LB00032F50000000000003 /* FineTuneLoopback.driver in Copy Loopback Driver */ = {isa = PBXBuildFile; fileRef = 79LB00042F50000000000004 /* FineTuneLoopback.driver */; };
79LB00202F50000000000020 /* CoreAudio.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 79LB00212F50000000000021 /* CoreAudio.framework */; };
79LB00222F50000000000022 /* CoreFoundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 79LB00232F50000000000023 /* CoreFoundation.framework */; };
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/* End PBXBuildFile section */

Expand All @@ -31,14 +35,42 @@
remoteGlobalIDString = 79A607AE2F05C9E00008D52A;
remoteInfo = FineTune;
};
79LB00052F50000000000005 /* PBXContainerItemProxy */ = {
isa = PBXContainerItemProxy;
containerPortal = 79A607A72F05C9E00008D52A /* Project object */;
proxyType = 1;
remoteGlobalIDString = 79LB00062F50000000000006;
remoteInfo = FineTuneLoopback;
};
/* End PBXContainerItemProxy section */

/* Begin PBXCopyFilesBuildPhase section */
79LB000B2F5000000000000B /* Copy Loopback Driver */ = {
isa = PBXCopyFilesBuildPhase;
buildActionMask = 2147483647;
dstPath = "";
dstSubfolderSpec = 7;
files = (
79LB00032F50000000000003 /* FineTuneLoopback.driver in Copy Loopback Driver */,
);
name = "Copy Loopback Driver";
runOnlyForDeploymentPostprocessing = 0;
};
/* End PBXCopyFilesBuildPhase section */

/* Begin PBXFileReference section */
7988AE512F1CC55900E6D086 /* fineTuneIcon.icon */ = {isa = PBXFileReference; lastKnownFileType = folder.iconcomposer.icon; path = fineTuneIcon.icon; sourceTree = "<group>"; };
79A607AF2F05C9E00008D52A /* FineTune.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = FineTune.app; sourceTree = BUILT_PRODUCTS_DIR; };
79A607BC2F05C9E10008D52A /* FineTuneTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = FineTuneTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
79A607C62F05C9E10008D52A /* FineTuneUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = FineTuneUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
79B1000A2F35000000000001 /* IOBluetooth.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = IOBluetooth.framework; path = System/Library/Frameworks/IOBluetooth.framework; sourceTree = SDKROOT; };
79LB00022F50000000000002 /* FTLoopbackDriver.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = FTLoopbackDriver.cpp; sourceTree = "<group>"; };
79LB00042F50000000000004 /* FineTuneLoopback.driver */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = FineTuneLoopback.driver; sourceTree = BUILT_PRODUCTS_DIR; };
79LB00072F50000000000007 /* FTLoopbackDriver.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = FTLoopbackDriver.h; sourceTree = "<group>"; };
79LB00082F50000000000008 /* SharedTypes.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SharedTypes.h; sourceTree = "<group>"; };
79LB00092F50000000000009 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
79LB00212F50000000000021 /* CoreAudio.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreAudio.framework; path = System/Library/Frameworks/CoreAudio.framework; sourceTree = SDKROOT; };
79LB00232F50000000000023 /* CoreFoundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreFoundation.framework; path = System/Library/Frameworks/CoreFoundation.framework; sourceTree = SDKROOT; };
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/* Begin PBXFileSystemSynchronizedRootGroup section */
Expand Down Expand Up @@ -87,13 +119,24 @@
);
runOnlyForDeploymentPostprocessing = 0;
};
79LB000F2F5000000000000F /* Frameworks */ = {
isa = PBXFrameworksBuildPhase;
buildActionMask = 2147483647;
files = (
79LB00202F50000000000020 /* CoreAudio.framework in Frameworks */,
79LB00222F50000000000022 /* CoreFoundation.framework in Frameworks */,
);
runOnlyForDeploymentPostprocessing = 0;
};
/* End PBXFrameworksBuildPhase section */

/* Begin PBXGroup section */
795C94762F4FF3BC004F0492 /* Recovered References */ = {
isa = PBXGroup;
children = (
79B1000A2F35000000000001 /* IOBluetooth.framework */,
79LB00212F50000000000021 /* CoreAudio.framework */,
79LB00232F50000000000023 /* CoreFoundation.framework */,
);
name = "Recovered References";
sourceTree = "<group>";
Expand All @@ -102,6 +145,7 @@
isa = PBXGroup;
children = (
79A607B12F05C9E00008D52A /* FineTune */,
79LB000A2F5000000000000A /* FineTuneLoopback */,
79A607BF2F05C9E10008D52A /* FineTuneTests */,
79A607C92F05C9E10008D52A /* FineTuneUITests */,
79A607B02F05C9E00008D52A /* Products */,
Expand All @@ -116,10 +160,22 @@
79A607AF2F05C9E00008D52A /* FineTune.app */,
79A607BC2F05C9E10008D52A /* FineTuneTests.xctest */,
79A607C62F05C9E10008D52A /* FineTuneUITests.xctest */,
79LB00042F50000000000004 /* FineTuneLoopback.driver */,
);
name = Products;
sourceTree = "<group>";
};
79LB000A2F5000000000000A /* FineTuneLoopback */ = {
isa = PBXGroup;
children = (
79LB00022F50000000000002 /* FTLoopbackDriver.cpp */,
79LB00072F50000000000007 /* FTLoopbackDriver.h */,
79LB00082F50000000000008 /* SharedTypes.h */,
79LB00092F50000000000009 /* Info.plist */,
);
path = FineTuneLoopback;
sourceTree = "<group>";
};
/* End PBXGroup section */

/* Begin PBXNativeTarget section */
Expand All @@ -130,10 +186,12 @@
79A607AB2F05C9E00008D52A /* Sources */,
79A607AC2F05C9E00008D52A /* Frameworks */,
79A607AD2F05C9E00008D52A /* Resources */,
79LB000B2F5000000000000B /* Copy Loopback Driver */,
);
buildRules = (
);
dependencies = (
79LB000C2F5000000000000C /* PBXTargetDependency */,
);
fileSystemSynchronizedGroups = (
79A607B12F05C9E00008D52A /* FineTune */,
Expand Down Expand Up @@ -194,6 +252,22 @@
productReference = 79A607C62F05C9E10008D52A /* FineTuneUITests.xctest */;
productType = "com.apple.product-type.bundle.ui-testing";
};
79LB00062F50000000000006 /* FineTuneLoopback */ = {
isa = PBXNativeTarget;
buildConfigurationList = 79LB000D2F5000000000000D /* Build configuration list for PBXNativeTarget "FineTuneLoopback" */;
buildPhases = (
79LB000E2F5000000000000E /* Sources */,
79LB000F2F5000000000000F /* Frameworks */,
);
buildRules = (
);
dependencies = (
);
name = FineTuneLoopback;
productName = FineTuneLoopback;
productReference = 79LB00042F50000000000004 /* FineTuneLoopback.driver */;
productType = "com.apple.product-type.bundle";
};
/* End PBXNativeTarget section */

/* Begin PBXProject section */
Expand All @@ -215,6 +289,9 @@
CreatedOnToolsVersion = 26.1.1;
TestTargetID = 79A607AE2F05C9E00008D52A;
};
79LB00062F50000000000006 = {
CreatedOnToolsVersion = 26.1.1;
};
};
};
buildConfigurationList = 79A607AA2F05C9E00008D52A /* Build configuration list for PBXProject "FineTune" */;
Expand All @@ -238,6 +315,7 @@
projectRoot = "";
targets = (
79A607AE2F05C9E00008D52A /* FineTune */,
79LB00062F50000000000006 /* FineTuneLoopback */,
79A607BB2F05C9E10008D52A /* FineTuneTests */,
79A607C52F05C9E10008D52A /* FineTuneUITests */,
);
Expand Down Expand Up @@ -291,6 +369,14 @@
);
runOnlyForDeploymentPostprocessing = 0;
};
79LB000E2F5000000000000E /* Sources */ = {
isa = PBXSourcesBuildPhase;
buildActionMask = 2147483647;
files = (
79LB00012F50000000000001 /* FTLoopbackDriver.cpp in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};
/* End PBXSourcesBuildPhase section */

/* Begin PBXTargetDependency section */
Expand All @@ -304,6 +390,11 @@
target = 79A607AE2F05C9E00008D52A /* FineTune */;
targetProxy = 79A607C72F05C9E10008D52A /* PBXContainerItemProxy */;
};
79LB000C2F5000000000000C /* PBXTargetDependency */ = {
isa = PBXTargetDependency;
target = 79LB00062F50000000000006 /* FineTuneLoopback */;
targetProxy = 79LB00052F50000000000005 /* PBXContainerItemProxy */;
};
/* End PBXTargetDependency section */

/* Begin XCBuildConfiguration section */
Expand Down Expand Up @@ -433,12 +524,11 @@
ASSETCATALOG_COMPILER_APPICON_NAME = fineTuneIcon;
ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
CODE_SIGN_ENTITLEMENTS = FineTune/FineTune.entitlements;
"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Developer ID Application";
CODE_SIGN_STYLE = Manual;
CODE_SIGN_IDENTITY = "Apple Development";
CODE_SIGN_STYLE = Automatic;
COMBINE_HIDPI_IMAGES = YES;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = "";
"DEVELOPMENT_TEAM[sdk=macosx*]" = "";
DEVELOPMENT_TEAM = T9MUAV83Z3;
ENABLE_APP_SANDBOX = NO;
ENABLE_HARDENED_RUNTIME = YES;
ENABLE_PREVIEWS = YES;
Expand All @@ -461,6 +551,7 @@
SWIFT_APPROACHABLE_CONCURRENCY = YES;
SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
SWIFT_EMIT_LOC_STRINGS = YES;
SWIFT_OBJC_BRIDGING_HEADER = "FineTune/FineTune-Bridging-Header.h";
SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
SWIFT_VERSION = 5.0;
};
Expand All @@ -472,12 +563,11 @@
ASSETCATALOG_COMPILER_APPICON_NAME = fineTuneIcon;
ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
CODE_SIGN_ENTITLEMENTS = FineTune/FineTune.entitlements;
"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Developer ID Application";
CODE_SIGN_STYLE = Manual;
CODE_SIGN_IDENTITY = "Apple Development";
CODE_SIGN_STYLE = Automatic;
COMBINE_HIDPI_IMAGES = YES;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = "";
"DEVELOPMENT_TEAM[sdk=macosx*]" = "";
DEVELOPMENT_TEAM = T9MUAV83Z3;
ENABLE_APP_SANDBOX = NO;
ENABLE_HARDENED_RUNTIME = YES;
ENABLE_PREVIEWS = YES;
Expand All @@ -500,6 +590,7 @@
SWIFT_APPROACHABLE_CONCURRENCY = YES;
SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
SWIFT_EMIT_LOC_STRINGS = YES;
SWIFT_OBJC_BRIDGING_HEADER = "FineTune/FineTune-Bridging-Header.h";
SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
SWIFT_VERSION = 5.0;
};
Expand Down Expand Up @@ -585,6 +676,40 @@
};
name = Release;
};
79LB00102F50000000000010 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = "";
GENERATE_INFOPLIST_FILE = NO;
HEADER_SEARCH_PATHS = "$(SRCROOT)/FineTuneLoopback";
INFOPLIST_FILE = FineTuneLoopback/Info.plist;
MACOSX_DEPLOYMENT_TARGET = 14.0;
PRODUCT_BUNDLE_IDENTIFIER = com.finetuneapp.FineTuneLoopback;
PRODUCT_NAME = "$(TARGET_NAME)";
WRAPPER_EXTENSION = driver;
};
name = Debug;
};
79LB00112F50000000000011 /* Release */ = {
isa = XCBuildConfiguration;
buildSettings = {
CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = "";
GENERATE_INFOPLIST_FILE = NO;
HEADER_SEARCH_PATHS = "$(SRCROOT)/FineTuneLoopback";
INFOPLIST_FILE = FineTuneLoopback/Info.plist;
MACOSX_DEPLOYMENT_TARGET = 14.0;
PRODUCT_BUNDLE_IDENTIFIER = com.finetuneapp.FineTuneLoopback;
PRODUCT_NAME = "$(TARGET_NAME)";
WRAPPER_EXTENSION = driver;
};
name = Release;
};
/* End XCBuildConfiguration section */

/* Begin XCConfigurationList section */
Expand Down Expand Up @@ -624,6 +749,15 @@
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
79LB000D2F5000000000000D /* Build configuration list for PBXNativeTarget "FineTuneLoopback" */ = {
isa = XCConfigurationList;
buildConfigurations = (
79LB00102F50000000000010 /* Debug */,
79LB00112F50000000000011 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
/* End XCConfigurationList section */

/* Begin XCRemoteSwiftPackageReference section */
Expand Down
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