diff --git a/Sources/PlayerRecorder.swift b/Sources/PlayerRecorder.swift
index 5bf0dd7..e24f747 100644
--- a/Sources/PlayerRecorder.swift
+++ b/Sources/PlayerRecorder.swift
@@ -375,9 +375,10 @@ final class PlayerRecorder: NSObject {
             return
         }
         
-        // 创建 AudioMix
+        // 使用 kCMPersistentTrackID_Invalid 匹配所有音频轨道
+        // HLS variant 切换会导致 trackID 变化（如 2→10），绑死具体 ID 会失效
         let inputParams = AVMutableAudioMixInputParameters()
-        inputParams.trackID = audioTrackID
+        inputParams.trackID = kCMPersistentTrackID_Invalid
         inputParams.audioTapProcessor = tapRef
         
         let audioMix = AVMutableAudioMix()
@@ -393,7 +394,7 @@ final class PlayerRecorder: NSObject {
         }
         print("[Recorder:DIAG] === installAudioTap DONE ===")
         
-        ctx.mixTrackID = audioTrackID
+        ctx.mixTrackID = kCMPersistentTrackID_Invalid
         
         // 写诊断日志
         var diagLog = "=== installAudioTap Log ===\n"
@@ -403,7 +404,8 @@ final class PlayerRecorder: NSObject {
         for (i, t) in itemTracks.enumerated() {
             diagLog += "  itemTrack[\(i)]: trackID=\(t.assetTrack?.trackID ?? -1) mediaType=\(t.assetTrack?.mediaType.rawValue ?? "?") enabled=\(t.isEnabled)\n"
         }
-        diagLog += "Audio trackID used: \(audioTrackID)\n"
+        diagLog += "Audio trackID used: kCMPersistentTrackID_Invalid (wildcard, matches all)\n"
+        diagLog += "Discovered audio trackID: \(audioTrackID)\n"
         diagLog += "TapCreate status: \(tapStatus)\n"
         diagLog += "audioMix set: \(verifyMix != nil)\n"
         writeDiagLog(diagLog)