17
MindPrint
®
T.R.I.O.
Synchronization
Affording flexible connections to digital studio
environments, T.R.I.O™’s digital interface features a three-
way selector providing all the options you need to configure
a digital setup.
9.4 44,1/48:
This button (in combination with the neighboring „x2“ button) determines
the sampling rate for T.R.I.O™ in stand-alone mode.
Position 1 selects 44.1 kHz.
When set to position 2, T.R.I.O™ runs on 48 kHz.
9.5 x1/x2 (= Double Sampling Rate)
When this button is set to position 1, the device operates on the frequency
determined by the neighboring 44.1/48 button’s setting. In position 2, the
device works with double the sampling rate defined by the 44.1/48 button;
that is 88.2 kHz or 96 kHz.
9.6 MASTER/SLAVE
In position 1, T.R.I.O.™ is the MASTER, and runs on the internally selected
sampling frequency. To ensure proper synchronization, the connected DAW
must be configured as „slave“ or „external“.
In position 2 (=SLAVE), T.R.I.O.™ automatically slaves to an incoming digital
signal once it has determined that this signal is viable. The device runs in
sync with the DAW’s sampling rate. The SYNC LED lights to indicate it is
receiving a viable digital signal.
9.7 USB
Connection:
On the back of the TRIO USB™ on the digital module,
a USB socket is found on the “B” version. A USB
connection cable (1.8 m, A/B connector) is included in
the TRIO USB™ delivery.
Software:
So that TRIO USB™ can communicate with your computer, you need to
install the enclosed driver software. That way, the TRIO USB™ will definitely
be correctly identified and all recording options are available. You will find a
detailed description of the driver software and its installation on the CD-ROM
provided and it can also be downloaded from www.mindprint.com. Please visit
the website regularly to read up on driver updates.
SYNCHRONIZATION
Once digital audio devices are connected, their internal clock
frequencies must be synchronized. To this end, one device acts as the
master, dictating the sampling rate and bit rate to the rest, which are
called slaves in this type of configuration. Symptoms such as popping
noises during recording are typical indications that devices aren’t in
sync and that settings require review.
SAMPLING RATE
The sampling rate is the frequency at which digital audio signals
are measured (sampled) at discrete points in time. In the case of an
audio CD, this is 44,100 times per second, which equals a frequency
of 44.1 KHz. As a rule, the higher the selected sampling rate, the
„better“ the audio signal quality; that is, the more accurately the
original analog signal is rendered.
Note that higher sampling rates require proportionately more memory.
x
As both TRIO and the DAW can work in MASTER mode, audible
interferences might occur because both units use their own
frequency. An indication for this is e.g. when the DAW playback
signal sounds dull and muddy. In case of doubt please double
check the sync settings of both units and make sure there is one
MASTER and one SLAVE.
y
T.R.I.O™’s digital interface processes audio at a resolution of up to
96 kHz / 24 bits.
y
Today, USB on the computer is as natural as the pin socket on the
mixer. Since first generation USB audio interfaces showed obvious
quality deficiencies and performance problems compared to
established formats such as S/P-DIF or ADAT, unfortunately USB does
not have the best reputation for audio quality. From today’s view,
however, these doubts are unfounded – technology has developed
considerably and USB as audio format is established.
y
USB stands for Universal Serial Bus, it comes from the computing
world and refers to an interface, which is based on a star topology.
The transfer takes place via a 4-core cable; the 4-pin USB socket is
available in two versions: the “flat” standard Type A version (hub
socket) and the almost square Type B variation (terminal socket).
The maximum cable length of a USB connection should not exceed
5 metres. One of the main advantages of USB is the hot plugging
ability, which makes it possible to remove or add devices while the
system is running without having to reboot the computer.
x
The fewer USB devices that are connected to your DAW, the better
the interface works. TRIO should not to be operated by a USB Hub or
behind another USB device such as a printer or terminal. Your TRIO
needs its own USB connection to the computer to ensure correct
operation.
y
USB 1.1 is used by many manufacturers and is absolutely
sufficient for stereo use. The USB 1.1 interface (Full Speed USB)
is fully compatible with the USB 2 format (High Speed USB) and
consequently equipped for the future. With USB 1.1 bandwidth full
duplex operation is possible (record while playing) – a system-
dependent limitation only takes places in the high resolution
24bit/96kHz mode. The possible input/output configurations can be
selected in the driver menu.
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