tweak spectrum color schema

diff --git a/gtk2_ardour/export_report.cc b/gtk2_ardour/export_report.cc
index 81b94222720be660c21562445d7c71ac5ad12c98..efc9fe9b5bc48af8f1c873260755dbea8e6faa37 100644 (file)
--- a/gtk2_ardour/export_report.cc
+++ b/gtk2_ardour/export_report.cc
@@ -584,7 +584,7 @@ ExportReport::ExportReport (Session* session, StatusPtr s)
                        for (size_t x = 0 ; x < width; ++x) {
                                for (size_t y = 0 ; y < height; ++y) {
                                        const float pk = p->spectrum[x][y];
-                                       ArdourCanvas::Color c = ArdourCanvas::hsva_to_color (252 - 260 * pk, .9, .3 + pk * .4);
+                                       ArdourCanvas::Color c = ArdourCanvas::hsva_to_color (252 - 260 * pk, .9, sqrt(pk));
                                        ArdourCanvas::set_source_rgba (cr, c);
                                        cr->rectangle (m_l + x - .5, y - .5, 1, 1);
                                        cr->fill ();