pulseaudio echo canceling after device cahnge

pulse-sink-change

@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+import asyncio
+import signal
+from contextlib import suppress
+import pulsectl_asyncio
+import time
+import subprocess
+
+#import pulsectl
+#print('Event types:', pulsectl.PulseEventTypeEnum)
+#print('Event facilities:', pulsectl.PulseEventFacilityEnum)
+#print('Event masks:', pulsectl.PulseEventMaskEnum)
+
+last_reload = 0
+
+async def listen():
+    async with pulsectl_asyncio.PulseAsync('event-printer') as pulse:
+        async for event in pulse.subscribe_events('all'):
+            global last_reload
+            if (event.facility == "sink_input" and event.index == 20 or event.facility == "server" and event.index == -1) and event.t == "change" and time.time() - last_reload >= 2:
+                last_reload = time.time()
+                subprocess.call(["pacmd", ".include", "/etc/pulse/default.pa.d/10-noise-cancellation.pa"])
+
+async def main():
+    # Run listen() coroutine in task to allow cancelling it
+    listen_task = asyncio.create_task(listen())
+
+    # register signal handlers to cancel listener when program is asked to terminate
+    for sig in (signal.SIGTERM, signal.SIGHUP, signal.SIGINT):
+        loop.add_signal_handler(sig, listen_task.cancel)
+    # Alternatively, the PulseAudio event subscription can be ended by breaking/returning from the `async for` loop
+
+    with suppress(asyncio.CancelledError):
+        await listen_task
+
+# Run event loop until main_task finishes
+loop = asyncio.get_event_loop()
+loop.run_until_complete(main())