try {
EchoBuffer buffer = new EchoBuffer(echoConf);
buffers.put(cm.getSourceId(), buffer);
MixDescriptor md = new MixDescriptor(buffer, 1.0d);
cm.getMixManager().addMix(md);
// start writing after we start reading, to ensure that the
// buffer wraps around once to give the appropriate delay
cm.getMemberReceiver().addForwardMember(buffer);