The Well-Tempered Computer, an introduction to computer audio

Friday, April 1, 2011

Morello USB-SPDIF 24bit/192khz Enabler


The first tubed USB to S/PDIF converter in the world? 

Based on Lukasz Fikus' digi-lampizator design, and very similar in concept to the Lampizator Transport but this one is a USB converter.


The tubed output stage operates differently to the solid state logic one. The Tube stage operates as linear class and amplifier and does not "saturate".  The normal logic IC based output buffer circuitry operates in "saturation" meaning it is slower to react to signal changes. The Tube stage also has much less input capacitance than CMOS logic IC's, so the rise-time of the signal is faster.

The technical result is a signal output that is cleaner and closer to the theoretically "ideal" SPDIF Signal.

As a result the DAC's SPDIF receiver can recover the signal and clock with less jitter, in technical terms. This in turn generally produces a better, more natural and non-fatiguing sound.
  • SPDIF out connects via 75 ohm BNC/RCA or TOSLINK to your DAC
  • ASIO drivers, bypassing the Windows playback system
  • Not compatible with Mac native drivers
  • This uses the Musiland 24bit/192khz module core functions, however fitted in its own chassis and extensively reworked with these enhancements to the power supply and digital signal path
  • Independent regulated/filtered linear power supply module - USB power is disabled
  • Circuit reconfigured: output level increased to industry standard for reliable signal lock
  • Signal critical capacitors changed to higher quality OSCONS
  • Ultimate clock with 0.5ppm TCXO and low noise power supply for lowest jitter