diff --git a/gtk2_ardour/quantize_dialog.cc b/gtk2_ardour/quantize_dialog.cc
index 7e3f2a1aba..0b723893c0 100644
--- a/gtk2_ardour/quantize_dialog.cc
+++ b/gtk2_ardour/quantize_dialog.cc
@@ -77,7 +77,7 @@ QuantizeDialog::QuantizeDialog (PublicEditor& e)
 	, strength_adjustment (100.0, 0.0, 100.0, 1.0, 10.0)
 	, strength_spinner (strength_adjustment)
 	, strength_label (_("Strength"))
-	, swing_adjustment (100.0, -130.0, 130.0, 1.0, 10.0)
+	, swing_adjustment (100.0, -250.0, 250.0, 1.0, 10.0)
 	, swing_spinner (swing_adjustment)
 	, swing_button (_("Swing"))
 	, threshold_adjustment (0.0, -Temporal::ticks_per_beat, Temporal::ticks_per_beat, 1.0, 10.0)
diff --git a/libs/ardour/quantize.cc b/libs/ardour/quantize.cc
index 56fa063e8b..75aa1ad4c0 100644
--- a/libs/ardour/quantize.cc
+++ b/libs/ardour/quantize.cc
@@ -47,7 +47,7 @@ Quantize::Quantize (bool snap_start, bool snap_end,
 	, _start_grid(start_grid)
 	, _end_grid(end_grid)
 	, _strength (strength/100.0)
-	, _swing (swing/100.0)
+	, _swing (swing)
 	, _threshold (threshold)
 {
 }
@@ -95,7 +95,7 @@ swing_position (Temporal::Beats pos, Temporal::Beats grid, double swing_strength
 		swung_previous_grid_position = Beats();
 	}
 
-	const ratio_t r (200 * swing_strength, 300);
+	const ratio_t r (swing_strength, 300);
 
 	if (swing_previous_grid_position) {
 		swung_previous_grid_position = swung_previous_grid_position + (grid * r);