via Bakis:
"via Rex Probe himself:
'about the new NTO & PCOs:
The VC FM index on the NTO is now linear with no base line pitch shift
The SYNC inputs work much better, with the points of tuning between the master & slave optimized. The sync 'grab' is now much 'deeper' into the harmonics.
The portamento section of the NTO is much smoother with lower harmonic distortion and better linearity.
Because of many improvements to the circuit associated with the SINE output, the sonic purity is greatly improved and with it the swept sine into the FM inputs
sounds great!
All the waveform outs on both the NTO & PCO have much improved sonic characters. Lower harmonic distortion, lower intermodulation distortion, lower phase noise, improved bandwidth linearity and improved jitter -- all without compromising their analog (phat) tonal richness!'"