Confidence value in nbest list is not normalized to 1.0?

I was wondering how to interpret the "confidence" value?
Usual values I get are between ~50 to >500 and it looks like >300 is ok.

Here is my setup:
- Vosk v0.3.30
- Small EN and DE models (v0.15)
- Streaming audio chunks in 16Khz mono
- [Test files](https://github.com/SEPIA-Framework/sepia-stt-server/tree/dev/src/www/test-audio)

You can reproduce my results using the [BETA version of the SEPIA STT Server](https://github.com/SEPIA-Framework/sepia-stt-server/tree/dev) (there are Docker containers for all platforms):

```
12:30:17 - {"type":"result","msg_id":7,"code":200,"transcript":" one two three four five","isFinal":true,"confidence":529.317749,"features":{}}
...
12:30:20 - {"type":"result","msg_id":14,"code":200,"transcript":" six seven eight nine ten","isFinal":true,"confidence":557.565491,"features":{}}
```

The 'confidence' you see in my results is taken directly from 'FinalResult'.