need BitVoicer11 library

can u please provide me BitVoicer11 library
or how to solve this problem

sketch_feb02a:14: error: ‘BitVoicerSerial’ does not name a type
sketch_feb02a.ino: In function ‘void loop()’:
sketch_feb02a:28: error: ‘bitVoicer’ was not declared in this scope

or how to solve this problem

Less than 10 seconds with Google and I had an answer.