Talks - drafted in English by Hisayoshi Nakatsuka, ZYX Co., Ltd., Japan
Music and The Human Ear
Non-linear Behavior of the Ear
Human Hearing - Amplitude Sensitivity Part 1
Human Hearing - Phase Distortion Audibility Part 2
Human Hearing - Distortion Audibility Part 3
Multidimensional Audio (Henning Moller, Bruel & Kjaer)
Nonlinear Audio Distortion
Audio Distortion Measurements
How To Graph Distortion Measurements
Rega VTA by Roy Gandy
Exposing the VTA myth? By Geoff Husband
Behind the curtain Nibiru MC RIAA phono preamplifier additional information
The original idea that made me think about audio topology in a radicaly different
way from the mainstream was the reading of The Be Yamamura Interview published
1996 on Cyberfi.
We obtained the first useful results in year 2000 and only a year ago we could say with confidence “This is it!”
The audio circuit is a break through in analog audio equipment as it is using a proprietary current domain class A circuit without capacitors in circuit and without any form of negative feedback applied. Low parts count, short signal path, the best
possible components used, tight tollerances and very important layout design as well as consideration of every detail, even the ones considered irrisory and usualy overlooked, play a big role in complete outcome. It must be underlined that phono
stages have to process and amplify the most tiny signals involved in a reproduction
system. If we try to make a simple calculation it will be a lot easier to understand as
to why it is so difficult to make an outstanding MC phono stage and why it is sensitive to mechanical vibrations trough coupling even extreme measures to prevent this are taken.
If we take an average MC cartridge with 0.5mV output on full modulation which is 10cm/s and pretend a good response on small signals such as hall reflections and other low levell information we must assure impeccable behaviour to at least 60dB
lower, translated to voltage it is 0.0005mV! I can assure you that this is a realy tiny
signal and should be treated as such. The other aspect that should be considered is
the noise floor of the stage. If noise floor is not by a 20dB lower than the smallest signal we can not expect high quality low levell details.
The same consideration is to be done regarding the influence of structural and airborn vibrations on sound. We know that all parts form resistors and capacitors
to transistors, even wires are sensitive to vibrations. We stuggled to make the Nibiru as inert as possible in this regard.