}
private void startMeters()
{
final Server s = superCollider.getServer();
final ServerOptions so = superCollider.getServerOptions();
final int numOutputBusChannels;
final int[] channels;
final Group mg = superCollider.getMasterGroup();
if( (s == null) || (oCfg == null) || (mg == null) ) return;
channels = new int[ oCfg.mapping.length ];
numOutputBusChannels = so.getNumOutputBusChannels();
for( int ch = 0; ch < channels.length; ch++ ) {
if( oCfg.mapping[ ch ] < numOutputBusChannels ) {
channels[ ch ] = oCfg.mapping[ ch ];
} else {
channels[ ch ] = -1;