diff --git a/modules/features/teamsbot/service.py b/modules/features/teamsbot/service.py
index fa468ff2..7969a701 100644
--- a/modules/features/teamsbot/service.py
+++ b/modules/features/teamsbot/service.py
@@ -417,6 +417,8 @@ class TeamsbotService:
                 audioContent=audioBytes,
                 language=self.config.language or "de-DE",
                 sampleRate=effectiveSampleRate,
+                channels=1,
+                skipFallbacks=True,
             )
 
             if sttResult and sttResult.get("success") and sttResult.get("text"):