The 1st thing that put me on to the issue of convergence was - each time I tried out the Sonarworks product, every measurement was not the same. i.e whatever method Sonarworks was using is not consistent, i.e because of human intervention, it was impossible to repeat the measurement in exactly the same way twice.

Considering that the speaker had not moved position, why should a measurement system give me perceptively and objectively different results each time I measure. Hmmmm.. No convergence in this method.

So this caused me to pause any further efforts I had, in developing a deterministic method using openly and freely available DRC, because I had not arrived at convergence, so there was no point in publishing any method where I had not put in the effort to achieve convergence - Convergence being - hey - do exactly this and achieve a fantastic result, and I call that method OK1's DRC Method version 1. Simple things like, exactly what level of smoothness should be applied to the determination of the correction, what level of SPL in the room should I be aiming at, for this size of room, too many variables that I had not fully resolved.

Tools like Acourate have many claims, including endorsement by Bob Katz, no disrespect to him, but in the music industry, endorsements are not worth that much, take them with a pinch of salt, cos you are never informed when Bob Katz has moved on from a tool he previously endorsed, to a tool you never ever hear about cos that is a tool that gives him competitive advantage and he is never going to share all his secrets with you! Then there is Dirac, ARC by IK Multimedia, and more. There really was no way to do a proper demo of Acourate, which is a bit of a pity. Can't recall there is a demo of ARC, or any other commercial DRC tools, except Sonarworks.

TBC in next post