Hi George,
I searched and can't find that source, it was a late night. But I did just receive more pre-arrival information from Technics. Now this is on the Jeno engine Low Jitter section so not sure if it what you are looking for, my rep says he will contact the factory for me if not. From Technics...
JENO stands for Jitter Elimination and Noise Shaping Optimization
Digital signals of various music sources come in with various sampling frequencies such as
36KHz/44.1KHz/48KHz/96KHz/192KHz. Therefore, before processing, these signals have to be
upsampled to a sampling frequency that is the least common multiple of the input/output sampling
frequency, and then decimated at the output sampling rate again. Since this oversampling signal
processing accuracy determines the performance and sound quality of the entire amplifier, it is
necessary to ensure maximum accuracy.
The digital audio signal input signal is first input to the “Low Jitter Sample Rate Converter”, and the
sampling frequency of the sound source input at various sampling frequencies is converted to a single
PWM drive frequency (768KHz).
In order to perform PWM drive with high accuracy, the signal must have no time fluctuation. Therefore,
a PWM signal is generated from a highly accurate clock signal obtained by the crystal oscillator. On
the other hand, the input signal contains jitter due to the influence of the transfer path, etc., and is
asynchronous with the output. In order to synchronize the input signal clock with the internal
processing clock of the amplifier, a highly precise Sample Rate Converter is required to have the
function of converting the sampling frequency(“over”-sampling) while removing the input jitter.
Cheers, John
