Audio is available from various sources like recordings of meetings, newscast, telephonic conversations, etc. In this era of information technology, with the technological progress, more and more digital audio, video, and images are being captured and stored day by day. The amount of audio data is increasing exponentially on the web and other information storehouses. In order to efficiently use this huge multimedia data, there should be an effective search technique. © 2019, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.