You do not need to download a separate “controller” file from third-party sites. Only use the official app stores or Sonos.com to avoid malware.
Sonos retired the old “Sonos Controller” name years ago. The modern replacement is simply the Sonos app . sonos controller download
Got an old system? Reply with your speaker model and I’ll tell you which app to use. 🎵 You do not need to download a separate