Hypothetically, someone could be attracted only to the sound of other peopleās voices and not physical appearances. They would struggle with how to identify because they are attracted to others (so they are probably not asexual) but they also aren't attracted to physical appearances or gender-based attributes so they might not feel comfortable saying they are gay, bisexual, straight, etc. This would cause them a lot of confusion about how to identify in a world that's so focused on physical appearances. Someone like that would be entirely grateful to stubble upon the term audiosexual and would feel like they are no longer alone in feeling this way. If enough people identified with the term, they could have their own nice little community like the Aces have.
For me though, I use it as a micro-label to partially explain how I experience attraction.