diff --git a/Gemfile b/Gemfile
index 4c8e15317..6ceb93d37 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,4 +3,5 @@ source 'https://rubygems.org'
 gem 'cocoapods'
 gem 'fastlane'
 gem 'jazzy'
+gem 'synx'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 93b6c469b..b830f6c7c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,6 +32,7 @@ GEM
       aws-eventstream (~> 1, >= 1.0.2)
     babosa (1.0.4)
     claide (1.0.3)
+    clamp (0.6.5)
     cocoapods (1.10.1)
       addressable (~> 2.6)
       claide (>= 1.0.2, < 2.0)
@@ -71,6 +72,7 @@ GEM
     cocoapods-try (1.2.0)
     colored (1.2)
     colored2 (3.1.2)
+    colorize (0.8.1)
     commander (4.6.0)
       highline (~> 2.0.0)
     concurrent-ruby (1.1.9)
@@ -247,6 +249,10 @@ GEM
       CFPropertyList
       naturally
     sqlite3 (1.4.2)
+    synx (0.2.1)
+      clamp (~> 0.6)
+      colorize (~> 0.7)
+      xcodeproj (~> 1.0)
     terminal-notifier (2.0.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
@@ -288,6 +294,7 @@ DEPENDENCIES
   cocoapods
   fastlane
   jazzy
+  synx
 
 BUNDLED WITH
    2.1.2
diff --git a/Sources/Util/MachUtil.swift b/Sources/Util/MachUtil.swift
deleted file mode 100644
index b47213916..000000000
--- a/Sources/Util/MachUtil.swift
+++ /dev/null
@@ -1,21 +0,0 @@
-import Foundation
-
-public struct MachUtil {
-    public static let nanosPerUsec: UInt64 = 1000
-    public static let nanosPerMsec: UInt64 = 1000 * 1000
-    public static let nanosPerSec: UInt64 = 1000 * 1000 * 1000
-
-    private static var timebase: mach_timebase_info_data_t = {
-        var timebase = mach_timebase_info_data_t()
-        mach_timebase_info(&timebase)
-        return timebase
-    }()
-
-    public static func nanosToAbs(_ nanos: UInt64) -> UInt64 {
-        nanos * UInt64(timebase.denom) / UInt64(timebase.numer)
-    }
-
-    public static func absToNanos(_ abs: UInt64) -> UInt64 {
-        abs * UInt64(timebase.numer) / UInt64(timebase.denom)
-    }
-}
diff --git a/Sources/Util/TimerDriver.swift b/Sources/Util/TimerDriver.swift
deleted file mode 100644
index 4946776ad..000000000
--- a/Sources/Util/TimerDriver.swift
+++ /dev/null
@@ -1,75 +0,0 @@
-import Foundation
-
-public protocol TimerDriverDelegate: AnyObject {
-    func tick(_ driver: TimerDriver)
-}
-
-// MARK: -
-public class TimerDriver {
-    public var interval: UInt64 = MachUtil.nanosToAbs(10 * MachUtil.nanosPerMsec)
-
-    var queue: DispatchQueue?
-    weak var delegate: TimerDriverDelegate?
-
-    private var runloop: RunLoop?
-    private var nextFire: UInt64 = 0
-    private var timer: Timer? {
-        didSet {
-            oldValue?.invalidate()
-            timer.map {
-                RunLoop.current.add($0, forMode: RunLoop.Mode.common)
-            }
-        }
-    }
-
-    public func setDelegate(_ delegate: TimerDriverDelegate, withQueue: DispatchQueue? = nil) {
-        self.delegate = delegate
-        self.queue = withQueue
-    }
-
-    @objc
-    private func on(timer: Timer) {
-        guard nextFire <= mach_absolute_time() else {
-            return
-        }
-        if let queue: DispatchQueue = queue {
-            queue.sync {
-                self.delegate?.tick(self)
-            }
-        } else {
-            delegate?.tick(self)
-        }
-        nextFire += interval
-    }
-}
-
-extension TimerDriver: Running {
-    // MARK: Running
-    public var isRunning: Atomic<Bool> {
-        .init(runloop != nil)
-    }
-
-    public func startRunning() {
-        DispatchQueue.global(qos: .userInteractive).async {
-            guard self.runloop == nil else {
-                return
-            }
-            self.timer = Timer(
-                timeInterval: 0.0001, target: self, selector: #selector(self.on), userInfo: nil, repeats: true
-            )
-            self.nextFire = mach_absolute_time() + self.interval
-            self.delegate?.tick(self)
-            self.runloop = .current
-            self.runloop?.run()
-        }
-    }
-
-    public func stopRunning() {
-        guard let runloop: RunLoop = runloop else {
-            return
-        }
-        timer = nil
-        CFRunLoopStop(runloop.getCFRunLoop())
-        self.runloop = nil
-    }
-}
diff --git a/Tests/RTSP/SessionDescriptionTests.swift b/Tests/RTSP/SessionDescriptionTests.swift
deleted file mode 100644
index 8a6cc45f7..000000000
--- a/Tests/RTSP/SessionDescriptionTests.swift
+++ /dev/null
@@ -1,32 +0,0 @@
-import Foundation
-import XCTest
-
-@testable import HaishinKit
-
-final class SessionDescriptionTests: XCTestCase {
-    static let contents: String =
-    "v=0\n" +
-    "o=- 486606654 486606654 IN IP4 127.0.0.1\n" +
-    "s=sample.mp4\n" +
-    "c=IN IP4 0.0.0.0\n" +
-    "t=0 0\n" +
-    "a=sdplang:en\n" +
-    "a=range:npt=0- 634.633\n" +
-    "a=control:*\n" +
-    "m=audio 0 RTP/AVP 96\n" +
-    "a=rtpmap:96 mpeg4-generic/48000/2\n" +
-    "a=fmtp:96 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=119056e500\n" +
-    "a=control:trackID=1\n" +
-    "m=video 0 RTP/AVP 97\n" +
-    "a=rtpmap:97 H264/90000\n" +
-    "a=fmtp:97 packetization-mode=1;profile-level-id=42C015;sprop-parameter-sets=Z0LAFdoCAJbARAAAAwAEAAADAPA8WLqA,aM4yyA==\n" +
-    "a=cliprect:0,0,288,512\n" +
-    "a=framesize:97 512-288\n" +
-    "a=framerate:30.0\n" +
-    "a=control:trackID=2"
-
-    func testString() {
-        var session: SessionDescription = SessionDescription()
-        session.description = SessionDescriptionTests.contents
-    }
-}