There could be some moron functions too like air velocity at the reflex port, horn gain, volume control position vs time, peak electrical and acoustic output as well as the compression factor.
All of this data of course could be manipulated to influence sales. Just imagine some software measuring the spectrum of your favorite music and then telling you that your $50K back loaded horn speakers do not have enough dynamic range...........
The log reader needs to be a stereo gear format piece of equipment.
Yup, this could be in a compact device for $50, $500, $5,000, $50,000.
Whenever I feel blue, I start breathing again.
I think that we need some standard interfaces on our playback gear to log operating parameters. Temperature, Gm, current, voltage. On loudspeakers maybe temperature/impedance, for digital playback I would like to see jitter, correction, transcoding error when resampling. If this is a device, then relative phase between channels, maybe highest and lowest frequency reproduced - or as a spectral plot. Maybe boot cycle parameters too. Timers for things like tubes and phone cartridges would also be useful!