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LampizatOr- The Horizon DAC Manual
USB playback
USB data uses an internal converter module to
convert the "packet" data into a steady i2S stream.
Our asynchronous converter has internal RAM and
two own clocks and own power supply and own
power transformer secondary winding. It has
optoisolation between the computer and the DAC
section, it has two separate own transformer
windings and two separate PSU units on floating
grounds.
The USB module requires a driver for Windows to
recognize it. MAC OS and LINUX work without any
need for extra drivers.
To download the Windows driver go to
www.jlsounds.com
http://www.jlsounds.com/drivers.html
Our USB converter is capable of working with 32 bit files with 768 kHz signal
frequency.
Only USB2 rated cables will work. The USB standard printer cable will not work
optimally.
USB cables with ferrite filters (the "thingie" on the cable ) will not work.
From JL website:
"Asynchronous USB to I2S interface
I2SoverUSB v.III board is especially designed for asynchronous audio transfer. It can
transmits PCM and both DSD512 native and DSD256 DoP audio data. This board
provides bit-perfect playback at sampling rates from 44.1 kHz up to 768 kHz with up to
32 bit resolution.
i2SoverUSB v.III uses reclock to reduce jitter significantly. I2S, S/PDIF outputs,
oscillators and reclock are galvanically isolated from XMOS processor and USB
ground. The galvanic isolation eliminates common noise originated by the computer.
There is an galvanically isolated external master clock input. The board is equipped
with NDK NZ2520SDA ultra low phase noise oscillator 45.158MHz and 49.152MHz.
LP5900 ultra-low noise linear voltage regulators are used. "
21
of
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and the drivera are there:
! 2 1
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