swirec_ppr_active
                                                    Activates phonetic pruning.
| 
                                                                     Value  | 
                                                                
                                                                     Boolean  | 
                                                            
| 
                                                                     Default  | 
                                                                
                                                                     0  | 
                                                            
| 
                                                                     How to set  | 
                                                                
                                                                     Set in the browser, using the Vendor-Specific-Parameters header in a RECOGNIZE or SET-PARAMS method.  | 
                                                            
| 
                                                                     Usage  | 
                                                                
                                                                     Rarely used  | 
                                                            
Phonetic pruning is a technique to control CPU through an initial “fast” search. It is particularly useful with large vocabularies. As in the other techniques, this algorithm potentially trades off accuracy and CPU so a customer needs to perform careful experimentation before deployment.