diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0a817b1..5b79bb7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,10 +49,10 @@ jobs:
       # bind/advertised address split + port range). If a legitimate
       # change is needed, update the pinned blob hashes below in the same
       # PR — loud and reviewable by design.
-      - name: Seam gate — loop_driver + rtc_session byte-identical to slice-3
+      - name: Seam gate — loop_driver frozen (slice-3) + rtc_session pinned (slice-5)
         run: |
           EXPECTED_LOOP_DRIVER='744bf314edf7f4925c8bb3bd0f5176dbc88f8113'
-          EXPECTED_RTC_SESSION='76bbcf8c85be0041abda1bcc3390b299fcef3d6f'
+          EXPECTED_RTC_SESSION='f47d63b9a2883d37066a93c9daa0e2cf8816bec4'
           GOT_LOOP_DRIVER=$(git hash-object crates/rutster-media/src/loop_driver.rs)
           GOT_RTC_SESSION=$(git hash-object crates/rutster-media/src/rtc_session.rs)
           if [ "$GOT_LOOP_DRIVER" != "$EXPECTED_LOOP_DRIVER" ]; then
diff --git a/crates/rutster-media/src/rtc_session.rs b/crates/rutster-media/src/rtc_session.rs
index 76bbcf8..f47d63b 100644
--- a/crates/rutster-media/src/rtc_session.rs
+++ b/crates/rutster-media/src/rtc_session.rs
@@ -130,8 +130,8 @@ pub struct RtcSession {
     pub(crate) pipe: Box<dyn AudioPipe + Send>,
     /// Local UDP socket str0m sends `Transmit` packets out on and
     /// receives `Input::Receive` packets from. Bound to an ephemeral
-    /// port at construction; the local candidate passed to str0m at
-    /// offer-accept time uses this address.
+    /// port at construction. The SDP candidate passed to the peer uses
+    /// the separate `advertised_addr` field, not this socket's address.
     pub(crate) socket: std::net::UdpSocket,
     /// Local socket address — cached because `local_addr()` is a syscall.
     pub(crate) local_addr: SocketAddr,
diff --git a/crates/rutster/src/media_thread.rs b/crates/rutster/src/media_thread.rs
index a50adcd..4fc7ec8 100644
--- a/crates/rutster/src/media_thread.rs
+++ b/crates/rutster/src/media_thread.rs
@@ -64,8 +64,8 @@ impl Default for MediaThreadOpts {
 #[derive(Debug)]
 pub enum MediaCmd {
     /// Construct a fresh RtcSession, store it under a new ChannelId, reply.
-    /// The thread constructs RtcSession::new() (keeps all RtcSession
-    /// construction on the thread that owns it).
+    /// The thread constructs RtcSession::new_with_config(&opts.media_cfg)
+    /// (keeps all RtcSession construction on the thread that owns it).
     Register {
         tap_url: url::Url,
         reply: oneshot::Sender<Result<ChannelId, String>>,