| Module | Name | Default | Description |
| UPDATEMEANS | F | Update means | |
| HCOMPV | SAVEBINARY | F | Load/Save in binary format |
| MINVARFLOOR | 0.0 | Minimum variance floor | |
| NSTREAMS | 1 | Number of streams | |
| SAVEASVQ | F | Save only the VQ indices | |
| HCOPY | SOURCEFORMAT | HTK | File format of source |
| TARGETFORMAT | HTK | File format of target | |
| SOURCEKIND | ANON | Parameter kind of source | |
| TARGETKIND | ANON | Parameter kind of target | |
| SAVEBINARY | F | Load/Save in binary format | |
|
HEREST | BINARYACFORMAT | T | Load/Save accumulators in binary format |
|
| HSKIPSTART | -1 | Start of skip over region (debugging only) |
| HSKIPEND | -1 | End of skip over region (debugging only) | |
| HHED | TREEMERGE | T | After tree splitting, merge leaves |
| TIEDMIXNAME | TM | Tied mixture base name | |
| HPARSE | V1COMPAT | F | Enable compatibility with HTK V1.X |
| REFLEVEL | 0 | Label level to be used as reference | |
| TESTLEVEL | 0 | Label level to be scored | |
| STRIPCONTEXT | F | Strip triphone contexts | |
| HRESULTS | IGNORECASE | F | If enabled, converts labels to uppercase |
| NISTSCORE | F | Use NIST fomatting | |
| PHRASELABEL | SENT | Label for phrase level statistics | |
| PHONELABEL | WORD | Label for word level statistics | |
| SPEAKERMASK | NULL | If set then report on a per speaker basis | |
| HVITE | RECOUTPREFIX | NULL | Prefix for direct audio output name |
| RECOUTSUFFIX | NULL | Suffix for direct audio output name | |
| HLSTATS | DISCOUNT | 0.5 | Discount constant for backoff bigrams |
| HLIST | AUDIOSIG | 0 | Audio signal numberfor remote control |
| SOURCERATE | 0.0 | Sample rate of source in 100ns units | |
| TRACE | 0 | Trace setting |