Synthetic narrowband data generation for narrowband automatic speech recognition systems

A method, in an information handling system comprising a processor and a memory, for generating synthetic telephony narrowband data from a broadband audio data file for training an automatic speech recognition model, the method comprising:

• monitoring, by the system, a first repository to detect a new broadband audio data file;
• upon detecting the new broadband audio data file, initiating, by the system, a telephony call that is placed using a pre-configured telephone provider to a designated phone number that can be received and/or monitored by the system;
• playing, by the system, the new broadband audio data file for transmission in the telephony call;
• receiving, by the system, the telephony call at the designated phone number to capture audio data generated by transmitting the new broadband audio data file in the telephony call;
• recording, by the system, the audio data as a synthetic telephony narrowband data file corresponding to the new broadband audio data file project;
• and
• storing, by the system, the synthetic telephony narrowband data file as an entry in a second repository;
• and
• terminating, by the system, the telephony call placed by the pre-configured telephone provider.