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# File Types

HPE IDOL Speech Server produces and uses files with the following file name extensions.

Note: If FFmpeg support is enabled, HPE IDOL Speech Server also accepts a wide range of media file formats when it uses the `wav` module to read from files.

`AFP` | Audio Fingerprint feature file
`AM` | Acoustic model file
`AST` | Speaker ID classifier set
`ATD` | Audio template development file
`ATF` | Audio template file
`ATS` | Audio template set file
`ATV` | Audio template feature vector file
`DCT.SZ` | Pronunciation dictionary file
`DIAG` | Diagnostics file
`DNN` | Deep Neural Network acoustic modeling file
`FMD` | Phoneme time track file
`FXX` | Audio Fingerprint database index file
`IAN` | Input acoustic channel normalization file
`LCF` | Language classifier file
`LIF` | Language identification feature file
`LIST` | List file
`LOG` | Log file
`NET` | Phrase search supplementary file
`NET.DPT` | Phrase search supplementary file
`OTD` | Obfuscated training data file
`PDT.SZ` | Word confidence supplementary file
`PGF` | Pronunciation generation file
`PHI.SZ` | Acoustic model language key files
`PHN.SZ` | Acoustic model language key files
`PLM` | Word confidence supplementary file
`PRB` | Word confidence supplementary file
`SID` | Segmenter model file
`SIG` | Signal processing description file
`SPK` | Individual speaker ID model file
`SPO` | Speaker ID optimization file
`SPT` | Speaker training file
`TKI` | Audio Fingerprint database index file
`TLM` | Language model file
`TTX` | Audio Fingerprint database index file
`TXT` | Text file
`USM` | Universal Speech Model file
`VOC` | Vocabulary list file
`WAV` | WAV audio file
`WDS` | Valid word list file (supplied in language pack)
`XML` | XML file

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