If you ever wanted to see and hear a complete space flight, YouTube user LunarModule5 has you covered: One of his hobbies is to compile together actual audio and video of missions, combined with simulator produced visuals and some minor editing into complete, comprehensive overviews of entire flights. Mercury-Atlas 6 is one such mission.
The actual flight was around 5 hours long and while edits make this video set slightly shorter, it’s still many hours of content, so if you are going to watch it, you might do well to take it in stages.
That being said, it’s about everything you could want and then some. Enjoy!