context.moduleMap.put( KEY_PRODC, prodc );
prodc.outLength = context.getTimeSpan().getLength();
prodc.progLen = prodc.outLength;
prodc.progOff = 0;
// prodc.spc = new NumberSpace( 0.0, 1.0, 0.0 );
prodc.source = new RenderSource( source );
prodc.source.trajBlockBuf = new float[ source.numTrns ][ source.numRcv ][ 0 ];
prodc.bufSize = 0;
if( prodc.consumer != null ) {
success = prodc.consumer.consumerBegin( context, prodc.source );