some sample rate mismatch and playthrough fixes

native/app/Podfile

@@ -11,7 +11,7 @@ target 'eqMac' do
     
     # Pods for eqMac
     pod 'AudioKit', '4.9.5'
-    pod 'AMCoreAudio', '~> 3.2.1'
+    pod 'AMCoreAudio', '~> 3.3.1'
     pod 'Criollo', '~> 0.5’
     pod 'WebViewJavascriptBridge', '~> 6.0'
     pod 'ReSwift'

native/app/Podfile.lock

@@ -1,5 +1,5 @@
 PODS:
-  - AMCoreAudio (3.2.1)
+  - AMCoreAudio (3.3.1)
   - AudioKit (4.9.5):
     - AudioKit/Core (= 4.9.5)
     - AudioKit/UI (= 4.9.5)
@@ -24,7 +24,7 @@ PODS:
   - Zip (1.1.0)
 
 DEPENDENCIES:
-  - AMCoreAudio (~> 3.2.1)
+  - AMCoreAudio (~> 3.3.1)
   - AudioKit (= 4.9.5)
   - Criollo (~> 0.5)
   - EmitterKit (~> 5.2)
@@ -67,7 +67,7 @@ CHECKOUT OPTIONS:
     :git: https://github.com/sveinbjornt/STPrivilegedTask.git
 
 SPEC CHECKSUMS:
-  AMCoreAudio: 7fa6b718dc93acc29f849d60c3ad680ae1bf07b5
+  AMCoreAudio: 6bf97d548d02ebb75b56c1cbf6b1f87bcfdeb748
   AudioKit: ccf4e39c89ed6e5cbbce5fef58d819db39446437
   CocoaAsyncSocket: 694058e7c0ed05a9e217d1b3c7ded962f4180845
   Criollo: 617173837c296ca4248b0b058f36ce9b91e5c25b
@@ -83,6 +83,6 @@ SPEC CHECKSUMS:
   WebViewJavascriptBridge: 7f5bc4d3581e672e8f32bd0f812d54bc69bb8e29
   Zip: 8877eede3dda76bcac281225c20e71c25270774c
 
-PODFILE CHECKSUM: af9609c8cb57f7a692fe492dc72205a4e2ea5b4b
+PODFILE CHECKSUM: e17cf26c243566da606db59c356b057283ec8836
 
 COCOAPODS: 1.9.1

native/app/Source/AppDelegate.swift

@@ -14,13 +14,6 @@ import ServiceManagement
 class AppDelegate: NSObject, NSApplicationDelegate {
   func applicationDidFinishLaunching(_ aNotification: Notification) {
     Application.start()
-//    print(Driver.latency)
-//    Driver.latency = 1000
-//    print(Driver.latency)
-//
-//    print(Driver.safetyOffset)
-//    Driver.safetyOffset = 1000
-//    print(Driver.safetyOffset)
   }
   
   func applicationWillTerminate(_ aNotification: Notification) {

native/app/Source/Application.swift

@@ -275,6 +275,11 @@ class Application {
   
   private static func createAudioPipeline () {
     Sources() { sources in
+      let outputSampleRate = selectedDevice.actualSampleRate()!
+      let driverSampleRates = Driver.sampleRates
+      let closestSampleRate = driverSampleRates.min( by: { abs($0 - outputSampleRate) < abs($1 - outputSampleRate) } )!
+      Driver.device!.setNominalSampleRate(closestSampleRate)
+  
       self.sources = sources
       effects = Effects()
       volume = Volume()

native/app/Source/Audio/Engine.swift

@@ -79,7 +79,7 @@ class Engine {
   
   private func setupBuffer () {
     let framesPerSample = Driver.device!.bufferFrameSize(direction: .playback)
-    ringBuffer = CARingBuffer<Float>(numberOfChannels: 2, capacityFrames: UInt32(framesPerSample * 1024 * 16))
+    ringBuffer = CARingBuffer<Float>(numberOfChannels: 2, capacityFrames: UInt32(framesPerSample * 512))
   }
   
   private func attach () {
@@ -89,8 +89,8 @@ class Engine {
   }
   
   private func attachSource () {
-    format = AVAudioFormat(commonFormat: .pcmFormatFloat32, sampleRate: 44_100, channels: 2, interleaved: false)
     sources.system.setInputDevice(engine: engine)
+    format = engine.inputNode.inputFormat(forBus: 0)
   }
   
   private func attachEffects () {

native/app/Source/Audio/Outputs/Output.swift

@@ -37,22 +37,8 @@ class Output {
     let abl = UnsafeMutableAudioBufferListPointer(ioData)!
     let output = Unmanaged<Output>.fromOpaque(inRefCon).takeUnretainedValue()
     let engine: Engine! = output.engine!
-    var inTS = AudioTimeStamp()
-    var outTS = AudioTimeStamp()
     let inputDevice = Driver.device!
 
-    if AudioDeviceGetCurrentTime(inputDevice.id, &inTS) != noErr {
-      makeBufferSilent(abl)
-      return noErr
-    }
-
-    if AudioDeviceGetCurrentTime(output.device.id, &outTS) != noErr {
-      makeBufferSilent(abl)
-      return noErr
-    }
-
-    output.varispeed.rate = Float(inTS.mRateScalar / outTS.mRateScalar)
-
     let sampleTime = inTimeStamp.pointee.mSampleTime
     if output.firstOutputTime < 0 {
       output.firstOutputTime = sampleTime
@@ -93,6 +79,7 @@ class Output {
   var device: AudioDevice!
   var engine: Engine!
   var outputEngine = AVAudioEngine()
+  var format: AVAudioFormat!
   var player = AVAudioPlayerNode()
   var varispeed = AVAudioUnitVarispeed()
   let deviceChanged = EmitterKit.Event<AudioDevice>()
@@ -109,10 +96,14 @@ class Output {
     
     outputEngine.setOutputDevice(device)
 
+    format = outputEngine.outputNode.outputFormat(forBus: 0)
+    varispeed.rate = Float(Driver.device!.actualSampleRate()! / device.actualSampleRate()!)
+
+    Console.log("Varispeed Rate: \(varispeed.rate)")
     outputEngine.attach(player)
     outputEngine.attach(varispeed)
-    outputEngine.connect(player, to: varispeed, format: nil)
-    outputEngine.connect(varispeed, to: outputEngine.mainMixerNode, format: nil)
+    outputEngine.connect(player, to: varispeed, format: format)
+    outputEngine.connect(varispeed, to: outputEngine.mainMixerNode, format: format)
 
     self.setRenderCallback()
     

native/app/Source/Audio/Sources/System/Driver.swift

@@ -53,6 +53,26 @@ class Driver {
     }
   }
   
+  static var sampleRates: [Double] {
+    return [
+      8_000,
+      11_025,
+      12_000,
+      16_000,
+      22_050,
+      24_000,
+      32_000,
+      44_100,
+      48_000,
+      64_000,
+      88_200,
+      96_000,
+      128_000,
+      176_400,
+      192_000
+    ]
+  }
+  
   static func getDeviceIsShown (device: DriverDevice) -> Bool {
     if Driver.device != nil { return true }
     if let pluginId = self.pluginId {