diff --git a/core/utils/waveform.py b/core/utils/waveform.py
index 5e2c0e2..636936f 100644
--- a/core/utils/waveform.py
+++ b/core/utils/waveform.py
@@ -16,7 +16,7 @@ def generate_waveform(input_file, output_file):
                 print "Starting waveform generation"
                 #print "%s -m -l -i %s -o -b 000000 %s" % (settings.DSS_WAVE_PATH, working_file, output_file)
                 #subprocess.call([settings.DSS_WAVE_PATH, "-t", "-m", "-l", "-i", working_file, "-o", output_file])
-                ret = subprocess.call(["/usr/local/bin/wav2png", "-w", "800", "-h", "120", "-o", output_file, working_file], stderr=subprocess.PIPE, stdout=subprocess.PIPE)
+                ret = subprocess.call(["/usr/local/bin/wav2png", "--foreground-color", "00000000", "--background-color", "2e4562ff", "-w", "800", "-h", "120", "-o", output_file, working_file], stderr=subprocess.PIPE, stdout=subprocess.PIPE)
                 if os.path.isfile(output_file):
                     os.remove(working_file)
                     print "Generated waveform"
diff --git a/spa/management/commands/deletefailed.py b/spa/management/commands/deletefailed.py
index 6c70b29..609509e 100644
--- a/spa/management/commands/deletefailed.py
+++ b/spa/management/commands/deletefailed.py
@@ -4,7 +4,7 @@ from spa.models import Mix
 
 class Command(NoArgsCommand):
     def handle(self, *args, **options):
-        candidates = Mix.objects.filter(waveform_generated=True)
+        candidates = Mix.objects.filter(waveform_generated=False)
         for mix in candidates:
             print "Deleting: %s" % mix.title
-            #candidates.delete()
\ No newline at end of file
+            mix.delete()
diff --git a/static/css/com.podnoms.player.css b/static/css/com.podnoms.player.css
index 03197bb..9b35be0 100644
--- a/static/css/com.podnoms.player.css
+++ b/static/css/com.podnoms.player.css
@@ -98,9 +98,14 @@ div.player-body ul.player-controls a {
     z-index: 9999;
 }
 
+.waveform{
+  background-color: #404040
+}
+
 .waveform img {
     width: 100%;
     height: 90px;
+    opacity: 0.4;
 }
 
 .download-progress-overlay {