diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index e9b0b1f..6dc7d87 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -567,6 +567,7 @@ AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
        if (read_from_sources (_sources, _length, mixdown_buffer, position, to_read, chan_n) != to_read) {
                return 0;
        }
+       DEBUG_TRACE (DEBUG::AudioPlayback, string_compose("\tMixdown buffer start value %1\n", mixdown_buffer[0]));
 
        /* APPLY REGULAR GAIN CURVES AND SCALING TO mixdown_buffer */
 
@@ -670,6 +671,8 @@ AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
                        _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
                }
 
+               DEBUG_TRACE (DEBUG::AudioPlayback, string_compose("\tGain buffer start value %1, buffer start value %2\n", gain_buffer[0], buf[0]));
+
                /* Mix our newly-read data with whatever was already there,
                   with the fade out applied to our data.
                */