Some of the most important items that could be recorded for making up durable or lasting items for family histories could include tape recordings or recorded oral recitations of history. This process connects to the most ancient system of recording mementos by memorizing all the details and reciting them when needed. Today, these are done by machines but still depends on human memory.
There are a lot of clans and histories behind them which have been compiled through the ages. Creating audio memories for families is part of the modern process for all sorts of folks today. They could be specific for the making of genealogies or family trees and things that are usually needed to keep clan memory alive through generations.
Making these today may be done by a set of experts who are trained to record clearly and precisely into recording instruments. They might also have use of a sound booth which is processed through electronic controls which mix sound qualities in harmonious balance. So what is recorded is going to last on the recording device in which your family story will finally reside.
This audio process works just the same as those recorded readings of famous works of fiction or non fiction. The primary element is the narrative, and to keep this clear and always interesting, their might be voice talents employed. Usually, it only takes one of this kind of expert to create a highly listenable item for the ages.
A voice talents knows how to enunciate words precisely so there is no possibility of misunderstanding anything. Most people talk with some kind of slurring of speech or some shortcuts which may sound different to the ears of others. Also, the recording may be something that should be useful for the distant future, and language may have changed before then.
So the most important part of this audio record should be the simplest and clearest sort of narrative voice. Also, it might be accompanied by translations into several languages or some visual rendering of the narrative. There should also be regular updates when usage changes over time, although this is more the work of historians.
Families though will often have a designated historian and this position can be handed down through the ages. The continuity of any line is often reliant on the recorded histories of clans, so that the later generations learn of their ancestors well. And learning from them is always something which is highly influential and will guide the future.
Later generations will certainly appreciate an audio recording of any kind. Also, it might come with a specific machine for use, since the recording and playback materials of today, no matter how advanced, will be primitive in the future. For the longest term usefulness, you should prepare well.
The performance though could be relevant to near future generations. And usually these will think to remake the records when circumstances demand it. It is now usually about technology which applies to the process and folks will know what to do with these when the time comes.