...

app.py

@@ -4,15 +4,11 @@ import time
 from flask import Flask, abort, request, jsonify, g, url_for
 import jwt
 from pipewire_python import link
-from pipewire_python.controller import Controller
 
 inputs = link.list_inputs()
 outputs = link.list_outputs()
 source = outputs[-1]
 sink = inputs[-1]
-audio_controller = Controller()
-interface = audio_controller.get_list_interfaces(type_interfaces="Client",filtered_by_type=True,)
-stream=interface[0]
 
 # initialization
 app = Flask(__name__)
@@ -63,7 +59,7 @@ def disconnect():
 
 @app.route('/api/volume/<float:vol>')
 def set_volume(vol):
-    stream.set_config(volume=vol)
+    source.set_config(volume=vol)
     return jsonify({'data': 'volume set'})
 
 if __name__ == '__main__':