M2TECH Vaughan - Manual (Page 26)

VAUGHAN
384
k H z /32bit digital-TO-ANALOG CONVERTER
REVISION 1PrA – MAY 2012
Copyright © 2012, M2Tech Srl
26
M2Tech
www.m2tech.biz
10. Cleaning the unit
The VAUGHAN should be cleaned with a soft, damp cloth. Do not use alcohol or other
cleaning liquids to avoid damaging the unit.
11. Tips on using the USB input
Depending on the PC or Mac being used, it is necessary to first connect and then power
up the VAUGHAN or first power up and then connect the VAUGHAN. Please try both ways to
see which one fits best to your computer.
Some care must also be used when switching from USB to other inputs and back. In fact,
the VAUGHAN’s USB interface is shut down whenever the selected input is other than USB,
to reduce the noise which can be coupled by the interface to other parts of the circuit when
it’s not used.
It’s strongly recommended to stop the player on the computer before switching to another
input or when putting the VAUGHAN in standby, to avoid unwanted behaviour from the
computer, like system crash or freezing.
12. Tips on using the I
2
S input
The VAUGHAN’s I
2
S input can be used with digital sources provided with I
2
S output, to
make an almost jitter-free connection which is better than a normal S/PDIF or AES/EBU
connection. This input is galvanically isolated to reduce noise coupling.
This I
2
S input accepts raw I
2
S data on an RJ-45 socket, compliant to LVCMOS or TTL
level (3.3V). Pinout is as follows (pins are listed from left to right):
2,4,6,8) Ground
1) SDATA
3) LRCK
5) SCLK
7) MCLK
Master clock high quality (low jitter) is mandatory in order to obtain the best performance
when using this input. In fact, due to the internal circuit structure, the LRCK is NOT used to
clock the DAC IC’s.
13. External clock input
The external clock input accepts both word clocks and master clocks (please refer to
technical specifications, Section 17 on Page 30, for details on the accepted frequencies).
A master clock is a high frequency clock (usually 22.5792MHz or 24.576MHz which the
unit uses directly to feed all audio digital circuits. A word clock is a sync clock with the