Random Thought

Memories are subtle. I think a thought about the past and details are lost or non-existent. When I hold a photo the memory is more clear than when looking at a digital photo. Is there a tangible link to memory as it relates to tactile feelings? The photo itself is not the memory but only an paper record of the time. I find it is the same with music. Listening to older tunes evokes memories. But seeing a video created, not even from the era, evokes a different type of memory.