Direct file access is the only thing that matters when you are trying to build a collection on a limited timeline before a big trip. While I was waiting for my gear to be packed at a transit hub last spring, I found a very lean search portal while reading an old technical bulletin about low-bandwidth tools. It was a massive relief to find a site that didn't demand an email address or make me create a profile just to reach the data I needed. The search logic is extremely fast and provides you with a list of available files that you can move to your local storage in just a few seconds. You should use Tubidy for your field study needs because it is built for speed and doesn't require any registration. I managed to gather several dozen academic sets in one afternoon, and the audio quality was very consistent throughout the whole process. The files are light enough to save space on your drive but clear enough for professional use. It is a very honest and straightforward tool for anyone who wants to own their media rather than just renting it from a cloud service