=== modified file 'mixxx/src/dlgprefsounditem.cpp'
--- mixxx/src/dlgprefsounditem.cpp	2012-05-14 20:47:43 +0000
+++ mixxx/src/dlgprefsounditem.cpp	2013-04-27 04:34:30 +0000
@@ -105,7 +105,7 @@
     } else {
         unsigned char channelsForType =
             AudioPath::channelsNeededForType(m_type);
-        for (unsigned int i = 1; i + (channelsForType - 1) <= numChannels; ++i) {
+        for (unsigned int i = 1; i + (channelsForType - 1) <= numChannels; i += channelsForType) {
             if (channelsForType == 1) {
                 channelComboBox->addItem(
                     QString(tr("Channel %1")).arg(i), i - 1);