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 Depending on the sound file format used, more or less disk space can  be used by the system. In general, more disk space used equals better  sound quality and vice versa.
  Our tests - standard conversation: | file type | size | time |  | gsm | 99kb | 00:01:04 |  | wav | 957kb | 00:01:06 |  | wav49 | 97kb | 00:01:02 |  | ogg | 237kb | 00:01:04 |  
 
  Our tests - silent tone:
 | File type | Size | Time |  | gsm | 0.32kb | 00:01:00 |  | wav | 3.0kb | 00:01:00 |  | wav49 | 0.32kb | 00:01:00 |  
  
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