Audio Annotation

Audio annotation services work is to make the audio files natural to machines through NLP or voice-based recognition system. It is the process of annotating the sound of our audio files from various sources to make it intelligible for machines through natural language processing or natural language understanding based machine learning or AI model developments. It plays an important role in the development of chatbots, virtual assistants and other NLP technology. 

Speech Recognition with Sound Annotation  

The sound or other communication between humans can be made recognizable to machines to understand and communicate in the same manner. Hence, Sunix provides the audio annotation for such needs using the most advanced annotation system with highly experienced annotators.  

Following are a few techniques of annotation: 

  • Speech to Text Transcription: Transcription of speech into text is an important part of the development of NLP models. This technique involves converting recorded speech into text, marking both words and sounds that the person pronounces. In this technique, it is also important to use correct punctuation. 
  • Audio Categorization: Thanks to this technique, machines can distinguish voice and sound characteristics. This type of audio labeling is important for the development of virtual assistants, as the AI model recognizes who is performing the voice command. 
  • Natural Language remark: Natural language utterance is about annotating human speech to classify minute details such as semantics, dialects, context, intonation, and so on. Therefore, natural language utterance is an important part of training virtual assistants and chatbots. 
  • Speech Labeling: Data annotators separate the required sounds from a given recording and label them with keywords. This technique helps in the development of chatbots that handle a specific, repetitive task. 
  • Music Classification: Data annotators can mark genres or instruments in this kind of audio annotation. Music classification is very useful for organizing music libraries and improving user recommendations. 


Business houses around the world need software tech firms who specialize in audio annotation. It is possible to use third party providers that offer open source and closed source audio annotation tools. Open-source audio annotation tools are free and since the codes are available to everyone, it can be customized to meet your organization’s needs. However, closed source tools have a team available to help set up to use the software as per your business needs. Only there is a service fee required to do the following operations. 


Audio annotation has progressed into many industries where customers are immediately demanding digitized and fast customer service.  

Due to this business houses have developed an option where customers could submit their complaints, take a virtual tour to get brief knowledge about specific products are called chatbots.  

Chatbots are nowadays very effective for customer relationship management in the majority of business houses as they are fast and useful.  These big data conversations are recorded on a daily basis in order to understand the customer’s preferences / habits.  

By recording these big data conversations, the annotators start the time stamping process so that ML process becomes easier and the final output becomes clearer.