Your company has stored a large number of audio files of phone calls made to your customer call center in an on-premises database. Each audio file is in wav format and is approximately 5 minutes long. You have been tasked with analyzing these audio files to determine customer sentiment. To achieve this, you plan to use Google's Speech-to-Text API to convert audio to text and then use a sentiment analysis tool to evaluate the transcriptions for customer sentiment. You need to choose the most efficient and scalable approach for this task. What should you do?