I'm able to get a reasonable level of accuracy with 8khz audio files. Now I want to try a higher sample rate, if I can.
Looking at the acoustic models available on this page, they list:
en-us-8khz.tar.gz
en-us-semi-full.tar.gz
en-us-semi.tar.gz
en-us.tar.gz
The one that says 8khz is obviously the one for the 8khz sample rate, but what about the other three? What sample rates do they match?
If I use a 16khz audio file, which of these acoustic models do I need to use?
And in the absense of the sample rate being in the file name, how do I figure out the sample rate of an acoustic model?
You can open the file feat.params in model folder and look for -upperf
parameter. In 8khz model -upperf
is usually 3500 or 4000. For 16khz model -upperf
is more than 4000, usually 6800.