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A Ruby library for consuming the AT&T Speech API for speech to text.

branch: master
README.md

att_speech

Build Status

A Ruby library for consuming the AT&T Speech API for speech to text. API details may be found here.

Installation

gem install att_speech

Usage

require 'att_speech'

att_speech = ATTSpeech.new({ :api_key    => ENV['ATT_SPEECH_KEY'],
                             :secret_key => ENV['ATT_SPEECH_SECRET'],
                             :scope      => 'SPEECH' })

# Read the audio file contents
file_contents = File.read(File.expand_path(File.dirname(File.dirname(__FILE__))) + "/bostonSeltics.wav")

# Blocking operation
p att_speech.speech_to_text(file_contents, type='audio/wav')

# Non-blocking operation with a future, if you have a longer file that requires more processing time
sleep 2
future = att_speech.future(:speech_to_text, file_contents, type='audio/wav')
p future.value

# Non-blocking operation that will call a block when the transcrption is returned
# Note: Remember, this is a concurrent operation so don't pass self and avoid mutable objects in the block
# from the calling context, better to have discreet actions contained in the block, such as inserting in a
# datastore
sleep 2
supervisor = ATTSpeech.supervise({ :api_key    => ENV['ATT_SPEECH_KEY'],
                                   :secret_key => ENV['ATT_SPEECH_SECRET'],
                                   :scope      => 'SPEECH' })
supervisor.future.speech_to_text(file_contents)
# do other stuff here
sleep 5
transcription = supervisor.value # returns immediately if the operation is complete, otherwise blocks until the value is ready

def write_wav_file(audio_bytes)
  file_name = "ret_audio-#{Time.now.strftime('%Y%m%d-%H%M%S')}.wav"
  full_file_name = File.expand_path(File.join(File.dirname(File.dirname(__FILE__)), 'examples', file_name))
  audio_file = File.open(full_file_name, "w")
  audio_file << audio_bytes
  audio_file.close
end

att_text = ATTSpeech.new({ :api_key    => ENV['ATT_SPEECH_KEY'],
                           :secret_key => ENV['ATT_SPEECH_SECRET'],
                           :scope      => 'TTS' })

# Read the text file contents
tfp = File.expand_path(File.join(File.dirname(File.dirname(__FILE__)), 'examples', 'helloWorld.txt'))
txt_contents = File.read(tfp)

audio = att_text.text_to_speech(txt_contents)
write_wav_file(audio)

# Non-blocking operation with a future, if you have a longer file that requires more processing time
sleep 2
future = att_text.future(:text_to_speech, "This is a hello world.", type='text/plain')
write_wav_file(future.value)

Copyright

Copyright (c) 2013 Jason Goecke. Copyright (c) 2014 Ben Klang. See LICENSE.txt for further details.

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