Adjustable pitch range

The accuracy of the new pitch is bad, because the range of pitch is between 0x - 2.00x. I think if the pitch range can be adjustable (e. g. between 0.75x - 1.25x) the accuracy will increase.
My suggested "predetermined" configurations are:
- Maximum Pitch: 0.00x-2.00x
- High Pitch: 0.25x-1.75x
- Medium Pitch: 0.50x-1.50x
- Precise Pitch: 0.75x-1.25x
P. D. : Sorry for my poor english, I'm spanish
My suggested "predetermined" configurations are:
- Maximum Pitch: 0.00x-2.00x
- High Pitch: 0.25x-1.75x
- Medium Pitch: 0.50x-1.50x
- Precise Pitch: 0.75x-1.25x
P. D. : Sorry for my poor english, I'm spanish