What is the fine-grained topic of the following text: Mitti has an interface clear, intuitive and uncluttered user with an easy workflow to learn and use, in addition to the modern audio 64 - bit, low latency and a powerful engine for video playback accelerated by GPU powered SMPTE for its robust speech system's internal clock. Only return the topic.
Mitti's user-friendly interface and advanced audio-video features