There are 2 audio file size limits for NVivo Transcription that are based on the method used to transcribe: If using the web service at transcription.mynvivo.com, the limit is 4 hours of audio duration/4GB of data. If using NVivo Transcription within the NVivo software, the limit is much smaller, at 2hrs of audio duration/2GB of data. If you have a large file, the best option is to transcribe using the web service.