diff --git a/Tests/sound.sh b/Tests/sound.sh
index fd08289..133fefb 100755
--- a/Tests/sound.sh
+++ b/Tests/sound.sh
@@ -940,9 +940,14 @@ open('$BUILD/still.pad','wb').write(b'\x00' * 20000)"
         --disk "$ROOT/Tests/build/disks/cosmos.img" --ram-disk 2048 \
         "$BUILD/cosmos.bin" > "$BUILD/splash.out" 2>&1 || true
 
-    # The tune is six seconds of ticks. What is checked is that music is still playing well
-    # after a splash that failed to load would have given up: the silent path holds the logo
-    # for ninety frames, a second and a half, and then the game starts.
+    # What is checked is that music is still playing well after a splash that failed to load
+    # would have given up: the silent path holds the logo for ninety frames, a second and a
+    # half, and then the game starts. So the late window is at three seconds, twice that.
+    #
+    # NOT LATER, because the tune stops sounding before it ends. Its last sequence on every
+    # voice is a rest, which is what holds the logo up while the voices decay - so a window
+    # past three and three quarter seconds is measuring the silence the score asks for and
+    # would fail on a tune that played perfectly.
     read -r EARLY LATE <<EOT
 $(python3 - "$BUILD/splash.raw" <<'PY2'
 import struct, sys
@@ -955,13 +960,13 @@ v = struct.unpack("<%dh" % n, d)
 def rms(a, b):
     w = v[a:b]
     return int((sum(x*x for x in w) / len(w)) ** 0.5) if w else 0
-print("%d %d" % (rms(48000, 96000), rms(192000, 240000)))
+print("%d %d" % (rms(48000, 96000), rms(144000, 168000)))
 PY2
 )
 EOT
     [ "${EARLY:-0}" -gt 500 ] && [ "${LATE:-0}" -gt 500 ] \
-        && result ok "a game plays its own music" "still sounding at four seconds, so it is the tune and not the silent hold" \
-        || result no "a game plays its own music" "RMS was $EARLY at one second and $LATE at four"
+        && result ok "a game plays its own music" "still sounding at three seconds, so it is the tune and not the silent hold" \
+        || result no "a game plays its own music" "RMS was $EARLY at one second and $LATE at three"
 fi
 
 echo