diff --git a/audio-knife/src/main.rs b/audio-knife/src/main.rs
index 15bf1719..db84c819 100644
--- a/audio-knife/src/main.rs
+++ b/audio-knife/src/main.rs
@@ -373,7 +373,7 @@ impl SessionState {
             }
         };
 
-        let conversation_span = info_span!("", cid = %short_conversation_id);
+        let conversation_span = info_span!("conversation", cid = %short_conversation_id);
         // We enter here, so that ContextSwitch picks the span up via `Span::current()`.
         let entered_conversation_span = conversation_span.enter();
 
diff --git a/services/azure/src/transcribe.rs b/services/azure/src/transcribe.rs
index 1d5104f7..d41d0077 100644
--- a/services/azure/src/transcribe.rs
+++ b/services/azure/src/transcribe.rs
@@ -3,7 +3,7 @@ use async_stream::stream;
 use async_trait::async_trait;
 use futures::StreamExt;
 use serde::Deserialize;
-use tracing::{error, info};
+use tracing::{debug, error, info};
 
 use azure_speech::recognizer::{self, Event};
 
@@ -128,17 +128,27 @@ impl Service for AzureTranscribe {
 
         while let Some(event) = stream.next().await {
             match event? {
-                Event::SessionStarted(_)
-                | Event::SessionEnded(_)
-                | Event::StartDetected(_, _)
-                | Event::EndDetected(_, _) => {}
+                Event::SessionStarted(_) | Event::SessionEnded(_) => {}
+                // StartDetected and EndDetected seem to be received only once per session. They are
+                // not usable for turn detection.
+                Event::StartDetected(request_id, offset) => {
+                    debug!(?request_id, offset, "Start of speech detected (ignored)");
+                }
+                Event::EndDetected(request_id, offset) => {
+                    debug!(?request_id, offset, "End of speech detected (ignored)");
+                }
                 Event::Recognizing(_, recognized, _, _, _) => {
                     output_recognized_text(&output, recognized, false, include_detected_language)?
                 }
                 Event::Recognized(_, recognized, _, _, _) => {
                     output_recognized_text(&output, recognized, true, include_detected_language)?
                 }
-                Event::UnMatch(_, _, _, _) => {}
+                Event::UnMatch(request_id, offset, duration, raw_message) => {
+                    debug!(
+                        ?request_id,
+                        offset, duration, raw_message, "Speech not recognized (ignored)"
+                    );
+                }
             }
         }
 
diff --git a/services/deepgram/src/transcribe.rs b/services/deepgram/src/transcribe.rs
index 8b047187..c97ac1e7 100644
--- a/services/deepgram/src/transcribe.rs
+++ b/services/deepgram/src/transcribe.rs
@@ -1,4 +1,4 @@
-use std::io;
+use std::{io, result};
 
 use anyhow::{Context, Result, anyhow, bail};
 use async_trait::async_trait;
@@ -103,7 +103,7 @@ impl Service for DeepgramTranscribe {
         let deepgram = Deepgram::with_base_url_and_api_key(endpoint.as_str(), params.api_key)?;
 
         let (mut input, output) = conversation.start()?;
-        let (mut audio_tx, audio_rx) = mpsc::channel::<std::result::Result<Bytes, io::Error>>(8);
+        let (mut audio_tx, audio_rx) = mpsc::channel::<result::Result<Bytes, io::Error>>(8);
 
         let mut stream = deepgram
             .transcription()