diff --git a/libs/ardour/ltc_slave.cc b/libs/ardour/ltc_slave.cc
index 664e774342..292426ed04 100644
--- a/libs/ardour/ltc_slave.cc
+++ b/libs/ardour/ltc_slave.cc
@@ -165,7 +165,10 @@ LTC_Slave::detect_ltc_fps(int frameno, bool df)
 				did_reset_tc_format = true;
 			}
 			if (cur_timecode != tc_format) {
-				warning << _("Session and LTC framerate mismatch.") << endmsg;
+				warning << string_compose(_("Session framerate adjusted from %1 TO: LTC's %2."),
+						Timecode::timecode_format_name(cur_timecode),
+						Timecode::timecode_format_name(tc_format))
+					<< endmsg;
 			}
 			session.config.set_timecode_format (tc_format);
 		} else {
@@ -174,7 +177,10 @@ LTC_Slave::detect_ltc_fps(int frameno, bool df)
 			if (a3e_timecode != cur_timecode) printed_timecode_warning = false;
 
 			if (cur_timecode != tc_format && ! printed_timecode_warning) {
-				warning << _("Session and LTC framerate mismatch.") << endmsg;
+				warning << string_compose(_("Session and LTC framerate mismatch: LTC:%1 Session:%2."),
+						Timecode::timecode_format_name(tc_format),
+						Timecode::timecode_format_name(cur_timecode))
+					<< endmsg;
 				printed_timecode_warning = true;
 			}
 		}
diff --git a/libs/ardour/mtc_slave.cc b/libs/ardour/mtc_slave.cc
index e08c14890c..4696f1e936 100644
--- a/libs/ardour/mtc_slave.cc
+++ b/libs/ardour/mtc_slave.cc
@@ -344,7 +344,10 @@ MTC_Slave::update_mtc_time (const byte *msg, bool was_full, framepos_t now)
 				did_reset_tc_format = true;
 			}
 			if (cur_timecode != tc_format) {
-				warning << _("Session and MTC framerate mismatch.") << endmsg;
+				warning << string_compose(_("Session framerate adjusted from %1 TO: MTC's %2."),
+						Timecode::timecode_format_name(cur_timecode),
+						Timecode::timecode_format_name(tc_format))
+					<< endmsg;
 			}
 			session.config.set_timecode_format (tc_format);
 		} else {
@@ -353,7 +356,10 @@ MTC_Slave::update_mtc_time (const byte *msg, bool was_full, framepos_t now)
 			if (a3e_timecode != cur_timecode) printed_timecode_warning = false;
 
 			if (cur_timecode != tc_format && ! printed_timecode_warning) {
-				warning << _("Session and MTC framerate mismatch.") << endmsg;
+				warning << string_compose(_("Session and MTC framerate mismatch: MTC:%1 Ardour:%2."),
+						Timecode::timecode_format_name(tc_format),
+						Timecode::timecode_format_name(cur_timecode))
+					<< endmsg;
 				printed_timecode_warning = true;
 			}
 		}
@@ -538,6 +544,7 @@ MTC_Slave::speed_and_position (double& speed, framepos_t& pos)
 {
 	framepos_t now = session.engine().frame_time_at_cycle_start();
 	framepos_t sess_pos = session.transport_frame(); // corresponds to now
+	//sess_pos -= session.engine().frames_since_cycle_start();
 
 	SafeTime last;
 	framecnt_t elapsed;