I think this would be a great idea. Recordings that have been indexed in the center of the page have tags. Therefore, let’s use those existing tags as search filters. The only thing holding this up that I could think of is that the tags might all be manually entered so that there isn’t an exact pattern or taxonomy present. So if such info was added as a filter the site operator would possibly have to go back through to every single tag and update them one-by-one…
Great feature to ask for, would really improve search strength!
Regards,
BigMike