PJ2 - I've already highlighted some steps to achieve CVRM in practice.
Remember too that voice analysis software is routinely used for security purposes and the steadily expanding speed of computers also help. If you work in a Shell refinery communications is recorded and available for training and quality purposes using technology used in call centres. Aviation is not that special.
Courage is needed to overcome the resistance to change that is holding back an advance in safety that certainly concerns the NTSB.