Grace m108 User manual

m108 microphone preamplifier / ADC
Owner's Manual – Revision C / September 27, 2016
Gra e Design, Lyons, CO / 1.303.823.8100
www.gra edesign. om / info@gra edesign. om

Contents
1 Wel ome.............................................................................................................................................................................. 2
2 Important Safety Information...................................................................................................................................... 3
3 Overview and Features.................................................................................................................................................. 4
4 Installation.......................................................................................................................................................................... 6
5 Basi Operation.............................................................................................................................................................. 10
6 Using the m108 Mixer.................................................................................................................................................. 15
7 Navigating and Using the Setup Menu................................................................................................................. 17
8 Remote Control.............................................................................................................................................................. 27
9 Dante Option Module.................................................................................................................................................. 29
10 Control Room Output................................................................................................................................................ 34
11 USB Setup...................................................................................................................................................................... 34
12 Firmware Upgrades.................................................................................................................................................... 35
13 Spe ifi ations............................................................................................................................................................... 38
14 Blo k Diagram.............................................................................................................................................................. 42
15 Cable Diagrams............................................................................................................................................................ 43
16 Warranty Information................................................................................................................................................ 44
17 Manual Revision History........................................................................................................................................... 45
1 Welcome
Thanks for pur hasing the m108 mi preamplifier. It has been painstakingly designed and built to pro-
vide you with a beautiful sounding, onfigurable and reliable mi preamp / ADC / interfa e. We worked
very hard to ensure that anyone with modest audio produ tion and engineering abilities an turn it on,
plug in a mi rophone, onne t it to a workstation and re ord. But of ourse, it also has a very deep and
useful feature set of whi h all users should edu ate themselves. Not only will this enable you to operate
the m108 more effi iently, but will free you up to fo us on the musi and the re ording. So please famil-
iarize yourself with the setup and operational details ontained in this manual. And as always with this or
any other Gra e Design produ ts, please don't hesitate to rea h out if you have any questions. We are
available by telephone Monday – Friday, 9AM to 5PM MST, or by email at info@gra edesign. om. Also,
other information in luding te hni al do uments and firmware an always be found on our website –
www.gra edesign. om. Thanks for reading and enjoy your m108!
m108 Owner's Manual page 2

2 Important Safety Information
2.1 GENERAL
• Indoor use only
• Ordinary Prote tion: This equipment should not be exposed to dripping or splashing.
• Avoid pla ing obje ts filled with liquids, su h as vases or glasses, on this equipment.
• Class I Equipment (grounded type)
• Ele tri al rating: 90-240V~ 50-60Hz 10W
• Mains supply voltage flu tuations are not to ex eed ±10% of the nominal supply voltage.
• Pollution Degree 2
• Installation (Over voltage) Category II for transient overvoltages.
• Maximum Relative Humidity: <80%
• Operation temperature range: 10 °C to 40 °C
• Storage and transportation temperature range –40 °C to 70 °C
• Maximum altitude: 3000m (9843 ft)
• Equipment suitable for ontinuous operation
2.2 SAFETY MARKING SYMBOLS
This symbol, lo ated on the equipment and in this manual, refers to important instru tions.
Read this manual thoroughly before operating this equipment.
This symbol, lo ated on the equipment and in this manual, indi ates the potential for ele tri al
sho k hazard.
2.3 SERVICE INFORMATION
The Gra e Design m108 ontains no user servi eable omponents. Conta t Gra e Design for repair and
upgrade information. In the event that your Gra e Design m108 needs to be returned to the fa tory,
onta t us for a return authorization number.
m108 Owner's Manual page 3

3 Overview and Features
3.1 Features
• 8 hannels of transparent, musi al mi preamplifi ation
• Wide gain range: -6 to 69dB
• 8 hannels of balan ed analog preamp outputs
• Ribbon mi mode
• 8 hannel digital outputs via AES, ADAT (SMUX), USB Class 2, and Dante™
• External Word lo k in and out
• Referen e DAC and headphone amplifier for low-laten y monitoring of preamp hannels, USB play-
ba k from a omputer, or Dante™ audio streams.
• Channel 1 & 2 balan ed HI-Z instrument inputs on front panel
• High ontrast, wide viewing angle OLED display for all system parameters and setup menu
• Combination RS 485/422 serial / MIDI ports for ontrol from existing m802 RCU or ProTools™
• m108 Controller App for Ma OS and Windows omputers
• RJ45 Ethernet port with web server for network ontrol using standard web browser
• Expansion slot for optional Audinate / Dante™ network audio ard
• Cooling fan for reliable operation in the harshest environments
• Built in 100-240VAC universal AC power supply
• 5 year transferable warranty
• Made in the USA
m108 Owner's Manual page 4

3.2 Front Panel Conne tions and Controls
1. Hi-Z balan ed inputs, CH 1 and 2
2. 1/4” Headphone Ja k
3. En oder: headphone / Control Room output level ontrol and MUTE, press and hold to enter mixer
ontrol
4. 48V phantom power swit h / mixer hannel mute
5. Phase reverse swit h / mixer hannel solo / press and hold to enable ribbon mode
6. PEAK CLR / press and hold to enter setup menu
7. GROUP / mixer hannel pan ontrol
8. OLED display s reen - all system parameters and setup menu
9. EDIT en oder, navigates and ontrols all system fun tions
10. Power swit h
3.3 Rear Panel Conne tions
1. IEC 90 - 250VAC power input
2. Ethernet Control Port
3. Serial Control DB9: RS485 / RS 422 - MIDI IN / MIDI OUT
4. Option ard slot
5. Word Clo k BNC IN / THROUGH / OUT
6. ADAT Lightpipe output
7. USB 2.0 audio interfa e
8. Analog Out DB25 (Tas am pinout)
9. AES3 Digital Out DB25 (Tas am pinout)
10. Mi rophone Inputs XLR
m108 Owner's Manual page 5
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4 Installation
4.1 Unboxing your m108
YOU m108 BOX WILL CONTAIN
• The m108 preamp
• 6’ AC power able whi h onne ts to the1m08's universal power supply
• A bag with rubber feet and ra k s rews
• A USB type A to type B able
• The owner’s manual and warranty registration ard
OPEN AND INSPECT YOU BOX
Please take are when removing the m108 from its OEM pa kaging. Our pa kaging is designed with ‘Kor-
rvu©’ suspension inserts, whi h provide the best prote tion from the dubious underworld of freight
handling – so save your pa kaging material. Inner boxes will ontain all the items listed above. If you
think you are missing anything, give your dealer or us a all and we’ll get you taken are of right away.
EGISTE YOU UNIT
We strongly urge you to fill out your warranty registration ard. The m108 is overed by a 5 year transfer-
able warranty. Registering your unit will help us onta t you if there are important updates and simpli-
fies warranty servi e. So please take a few minutes to omplete and send in the en losed ard, or simply
fill out the warranty registration form on our website. We always keep your information private. Thank
you!
4.2 Conne ting the m108
POWE CONNECTIONS
The m108 has a built-in universal power supply whi h a epts line voltages of 90 to 240VAC. We
in lude a power able spe ified for the ountry where it was ordered, so it should be supplied or-
re tly. If not, please onta t your dealer or distributor for help. For safety, it is re ommended that
the AC power able be onne ted to a grounded outlet.
AUDIO CONNECTIONS
Mi rophone Inputs: Female XLR, pin 2 positive, pin 3 negative and pin 1 ground. 48V phantom power is
supplied on pins 2 and 3. With a gain range from -6dB to 69dB these inputs an be used for any type of
mi rophone or as line level inputs.
Analog Balan ed Line Outputs: DB25 Tas am pinout (See CABLE DIAGRAMS hapter 13). These outputs
are always a tive. ADC full s ale (0dBFS) is referen ed to a signal level of +24dBu
AES3 Digital Outputs: DB25 Tas am pinout (See CABLE DIAGRAMS hapter 13) These outputs are a tive
when the ADC is on.
m108 Owner's Manual page 6

ADAT Lightpipe Outputs: Opti al Ja ks provide 8 hannels of audio data on ea h (at 44.1kHz and
48kHz). At 88.2kHz and 96kHz the ADAT S-MUX is enabled and hannels 1-4 are transmitted on ADAT
output 1, while hannels 5-8 are transmitted on ADAT output 2. 176.4kHz and 192kHz sample rates are
not supported over the ADAT interfa e. These outputs are a tive when the ADC is on.
USB Class 2 Audio Interfa e: USB Type B 8 hannel audio output to host omputer and 2 hannel input
from host omputer. Use a standard USB type A -to- type B able (in luded with your m108). The type A
onne tor is to be plugged in to the HOST omputer and the type B onne tor to the m108 input. PCM
44.1kHz – 192kHz/24 bit is supported. Please refer to USB audio setup on Chapter 11. This ja k is also
used for m108 firmware upgrades.
Option Card Dante ™ Module: This option provides the m108 with a Dante interfa e. Two gigabit ether-
net ports are provided for redundant Dante networks. The Dante interfa e provides 8 hannels of out-
puts and inputs at sample rates up to 192kHz to other Dante enabled devi es. Detailed instru tions for
operation are in hapter 8.
Option Card Control Room Outputs: 1/4" TRS Ja ks. Tip positive, Ring negative, and Sleeve ground. Pro-
vides a single pair of balan ed stereo analog speaker outputs, whi h onne t to your stereo monitor sys-
tem (power amp or powered speakers). Conne tions are made with standard balan ed TRS ables. The
output volume of this output is ontrolled by the Headphone volume ontrol on the front panel.
WORDCLOCK IN: BNC 75Ω or 47kΩ (setup menu sele ted). The m108 an a ept a standard 5V/75Ω
Word Clo k signal from an external lo k generating unit. This might be a stand-alone lo k sour e or
via, for example, the Word Clo k output from your digital audio workstation. The m108 lo ks to the in-
oming word lo k with an ultra low jitter PLL. The PLL has a fast lo k mode whi h rapidly a quires lo k
and then swit hes to a high jitter reje tions mode with a loop bandwidth of 0.5Hz. This provides ex ep-
tional jitter reje tion for the ADC and DAC sample lo ks. In the event of a dropout or loss of in oming
word lo k signal, the intelligent PLL will remain at the last known valid frequen y. When the signal is re-
stored the PLL will smoothly re-a quire lo k.
WORDCLOCK OUT: BNC 75Ω. The Word Clo k output allows the user to syn hronize other digital audio
equipment to the m108. When the menu setting " lo k output" is set to external, this onne tor output
is a buffered opy of the signal on the word lo k IN ja k. This mode is useful for "daisy haining" multiple
m108s together in a system. When " lo k output" is set to internal this onne tor outputs a buffered
opy of the internal m108 word lo k. The output is buffered and is designed to drive a 75Ω line.
REMOTE – RS485 / RS422: DB9. This is a galvani ally isolated serial port for ontrolling the m108. With
updated firmware, the m802RCU an ontrol the m108 allowing m108 preamplifiers to be added to an
existing m802 system. For wiring diagrams, see hapter 13.
MIDI IN – MIDI OUT: DB9. The m108 an be ontrolled dire tly from AVID ProTools® HD, via these ja ks
and ompatible AVID I/O hardware. For wiring instru tions, able diagrams, hapter 13.
ETHERNET: RJ45. This is a standard 100 Base-T Ethernet interfa e and is used to onne t the m108 to a
TCP/IP network for the purpose of ontrol via the m108. The m108 ontains a web server with whi h al-
lows for web browser based ontrol.
m108 Owner's Manual page 7

4.3 Thermal Management
The m108 ontains a large amount of ir uitry in to a very ompa t 1U hassis. Under normal operating
onditions the m108 will dissipate 20-25W of power depending on user settings. To prote t the m108
from ex essively high internal temperatures, and to ensure long term reliability, it is equipped with a
40mm variable speed fan. Whether or not this fan turns on is dependent on several variables. These are:
ambient temperature, whether there is air movement around the m108, and if the m108 is mounted in
onta t with other heat generating equipment.
The variable speed fan to omes on to ool the internal ir uits if the main ir uit board temperature
rises above 45ºC (113ºF). The fan has four speed ranges whi h are triggered by the following p b tem-
perature points:
1. 45ºC (113ºF)
2. 49ºC (120ºF)
3. 52ºC (125ºF)
4. 55ºC (131ºF)
If the m108 is mounted without spa e above and below and it is adja ent to heat generating devi es
then the internal temperature an rise above 45ºC and the fan will ome on.
If the m108 is being used in an area where fan noise is undesirable it is re ommended that the m108 be
mounted su h that is has spa e below and above the hassis and where the ambient temperature does
not ex eed 30ºC (86ºF). If multiple m108s are to be mounted in a ra k en losure it is best if there be a
spa e between ea h unit.
m108 Owner's Manual page 8

If ra k spa e does not allow for this then the m108s an me mounted with a spa e in between every two
units. In this onfiguration ea h preamplifier has one top or bottom surfa e exposed to ambient air.
If it is ne essary to mount multiple m108s in a ra k without spa es in between them there should be
for ed air ventilation in the ra k abinet to ensure adequate ooling. This type of mounting is not
re ommen ed unless the ra k is lo ated in a limate ontrolled environment, i.e. not outside in the hot
sun.
m108 Owner's Manual page 9

5 Basic Operation
5.1 The EDIT En oder
This is a rotary push-button en oder whi h is used to navigate and ontrol system parameters. In the
main Preamplifier Control mode and Mixer Control mode it sele ts preamplifier hannels and adjusts pa-
rameters. This en oder is also used for ontrolling the mixer fun tions and navigating the setup menu.
5.2 The VOL / MUTE (mix)
This push-button en oder is used to ontrol the level of the headphone and ontrol room outputs (if CR
option ard is installed). Turing the knob lo kwise in reases the level in 1dB steps. A single press will
mute the outputs. Pressing it again will un-mute the outputs.
When the headphone level hange is ena ted, a temporary pop-out window appears on the left side of
the display (if the urrent display mode is set to display headphone status, this window will already be
displayed). This window shows the headphone sour e and level. When level adjustment is omplete, the
fly-out window automati ally disappears. Pressing and holding this knob will enter the m108 mixer.
5.3 The Front Panel Hardware Swit hes
The labeling onvention for these swit hes is as follows:
UPPE CASE - Preamplifier mode function
lowercase - Mixer mode function
(parenthesis) - Push-Hold function
The four hardware swit hes between the VOL / MUTE knob and the OLED display ena t the following
fun tions:
• 48V/mute: pressing this swit h will turn on the phantom power supply for a sele ted mi preamp
hannel. In mixer mode this swit h is used to mute the sele ted mixer hannel.
• Ø (ribbon mode) / solo: pressing this swit h will reverse the signal polarity of a sele ted mi preamp
hannel. Pressing and holding this swit h will a tivate ribbon mi mode. In mixer mode this swit h
is used to solo the sele ted mixer hannel.
• PEAK CLR / (setup): pressing this swit h will lear all the peak status indi ators a ross all 8 mi
preamp hannels, or pressing and holding this swit h will enter the m108 into Setup Menu mode.
• GROUP / pan: pressing this swit h will a tivate group mode. Pressing and holding this swit h while
turning the EDIT knob adds (or subtra ts) sequential hannels to a group. In mixer mode this swit h
is used to enter and exit pan ontrol on the sele ted mixer hannel.
m108 Owner's Manual page 10

5.4 The m108 OLED Display S reen
This s reen has three main display modes:
• Preamplifier mode
• Mixer mode
• Setup mode
The default display mode at power up will be the Preamplifier Control Mode. This s reen is user onfig-
urable via the 7 “display modes” in the setup menu, detailed in hapter 7. The fa tory default s reen at
power up (titled 'system' in the setup menu) will show the 8 mi preamp hannels, and a system status
window on the right whi h shows basi ADC and word lo k status.
The Mixer mode is a tivated by pushing and holding the VOL/MUTE (mix).
The Setup mode is a tivated by pushing and holding the PEAK CLR/(setup) button.
Mic Preamp Operating Screen
1. Channel number
2. Level meter
3. 48V i on
4. Hi-Z input i on
5. Over indi ator
6. Phase reverse I on
7. Gain level
8. Ribbon mode I on
9. ADC status display
m108 Owner's Manual page 11
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Mixer Operating Screen
1. Channel number / name
2. Channel level display
3. Channel pan display
4. Mute
5. Solo
6. 2 h monitor input level
7. Master 2 h mix level
8. Monitor Sour e sele t
9. Headphone Sour e sele t
m108 Owner's Manual page 12
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7

Setup Menu Screen
Setup menu items 1 – 16 (see hapter 7)
5.5 Setting Mi Preamplifier Gain
1. Use the rotary en oder to sele t a hannel.
2. The urrent hannel number be omes reversed (ba klit in yellow) and the larger hannel number
will be displayed on the far right side of the s reen.
3. A single press of the EDIT en oder now enters gain adjust mode, whi h is indi ated by the ba klit
hannel number be oming brighter.
4. Turn the EDIT en oder lo kwise to in rease the mi preamplifier gain, or ounter- lo kwise to
de rease the mi preamplifier gain.
5. When the desired gain level is a hieved, press the EDIT en oder again to exit gain adjust mode,
whi h is indi ated by the ba klit hannel dimming to its normal brightness.
6. The settings for a hannel an be adjusted with the +48V, PHASE, or DATA ontrols. pressing the
+48V, PHASE or ribbon ontrols. Button toggles that fun tion on or off for that hannel. Press and
hold the PHASE button to toggle RIBBON mode for the sele ted hannel.
7. The bar graph meter at the right edge of ea h hannel se tion is a dBFS level meter whi h
indi ates ADC output levels from –60 to 0dBFS.
Note: If you would like a larger view of the sele ted hannel, press and hold the EDIT en oder. This will
enter you into ' hannel' view, whi h shows an exploded version of a single hannel, with a large level
meter, the full hannel name and a large gain setting number. Press and hold the EDIT en oder again to
return to the previous s reen.
5.6 A tivating 48V Phantom Power
To a tivate 48V phantom power on a preamp hannel, use the EDIT knob to sele t the hannel and press
the 48V panel swit h to the left of the s reen. 48V power ON will be indi ated by the lightning bolt
power i on in the middle of the hannel olumn. Pressing the 48V panel swit h again with the hannel
sele ted will dea tivate 48V phantom power.
m108 Owner's Manual page 13

5.7 A tivating Phase Reverse
To reverse the signal polarity on a preamp hannel, use the EDIT knob to sele t the hannel and press
the Ø panel swit h to the left of the s reen. Phase reverse will be indi ated by the Ø i on in the middle of
the hannel olumn. pressing the Ø panel swit h again with the hannel sele ted will dea tivate phase
reversal.
5.8 Ribbon Mi Mode
To a tivate Ribbon Mi Mode on a preamp hannel, use the EDIT knob to sele t the hannel and press
and hold the Ø panel swit h to the left of the s reen. Ribbon mi mode will be indi ated by the 'R' i on
in the middle of the hannel olumn. Ribbon Mi Mode prevents 48V phantom power from being inad-
vertently applied to a mi input to whi h a ribbon mi rophone is onne ted.
5.9 Peak Clear
The m108 signal meters will display a small line to indi ate the highest level (peak) a parti ular hannel
has a hieved. There are 3 modes for displaying these peaks whi h an be sele ted in the setup menu
( hapter 7) 'off, de ay, and hold'. If either the de ay or hold settings are hosen, then the peak indi ator
will remain lit until it is manually leared with this swit h or automati ally after a period of time (de ay).
As well as signal peaks, the signal level meter will display a bright square next to the gain level number
to indi ate an OVER at the ADC. If this is shown, a level adjustment should be made. OVER indi ators will
remain on until leared with the peak lear swit h.
5.10 Channel Group Mode
The Group mode allows between 2 to 8 adja ent mi preamp hannels to be grouped together for gain
hange operations. To enter group mode, press the GROUP swit h. Any defined hannel groups will ap-
pear without verti al dividing lines.
To define a group, pla e the ursor on the left most hannel of the hannels to be grouped and turn the
EDIT knob lo kwise while pressing and holding the GROUP swit h. You will noti e that the verti al di-
viding lines between hannels disappear as hannels are added to a group.
On e in Group mode, gain hanges are made in the same manner as in normal Channel sele t mode. To
remove a group, pla e the ursor on the right most hannel of the hannels in the group and turn the
EDIT knob ounter lo kwise while pressing and holding the GROUP swit h. You will noti e that the ver-
ti al dividing lines between hannels reappear as hannels are removed from a group.
Groups are limited to adja ent hannels only and groups annot span between preamplifier units. Also,
only gain an be adjusted when in Group mode. To toggle the status of Phantom power or Phase on a
hannel, you must exit Group mode.
m108 Owner's Manual page 14

5.11 Using the HI-Z inputs
Channels 1 and 2 an be used as high impedan e instrument inputs, for plugging an instrument or line
level sour e dire tly into the front panel. These 1/4” inputs sense if a able is plugged in and will auto-
mati ally a tivate the HI-Z input. When a tive, the hannel display on the OLED s reen will show a 1/4”
plug i on. This input has 10M Ohm input impedan e.
6 Using the m108 Mixer
The m108 mixer is used to mix and monitor the 8 mi preamp hannels as well as 2 in oming auxiliary
hannels from the USB interfa e or an installed option module. Monitoring the mixer output is done
with the headphone output or the optional stereo CR ( ontrol room) output module.
To enter the m108 mixer, press and hold the VOL / MUTE (mix) en oder knob. The mixer s reen will ap-
pear. This s reen has 3 pages whi h automati ally hange as the ursor travels a ross them from side to
side. They are:
1. mixer hannels 1-4
2. mixer hannels 5-8
3. monitor hannel, master, monitor sour e sele t, and headphone sour e sele t
6.1 To adjust the level of a mixer hannel:
1. Use the EDIT knob to sele t a hannel.
2. Press the EDIT knob to enter level adjust mode, whi h will be indi ated by the numeri al level
display be oming outlined and the hannel name / number be oming brighter.
3. Turning the EDIT knob to adjust the mixer hannel level, from 0dB to OFF.
4. Press the EDIT knob again to exit level adjust mode.
m108 Owner's Manual page 15

6.2 To pan a mixer signal left or right in the stereo field:
1. S roll to sele t the hannel you wish to pan.
2. Press the pan swit h to enter pan mode, whi h will be indi ated by the pan display be oming
outlined and hannel name / number be oming brighter.
3. Turn the EDIT knob lo kwise to pan the sour e to the right, or ounter- lo kwise to pan the
sour e to the left. Note: the pan level in rements expand progressively the further a signal is
panned.
4. Press the pan swit h or EDIT knob to exit pan mode.
6.3 To mute a mixer signal:
1. S roll to sele t the hannel you wish to mute.
2. Press the mute swit h. The hannel will be muted and mute status will be indi ated by the mute
i on being ba klit yellow.
3. Press the mute swit h again to un-mute the hannel.
6.4 To Solo a mixer hannel:
1. S roll to sele t the hannel you wish to solo.
2. Press the solo swit h. The hannel will be solo'd and solo status will be indi ated by the solo
indi ator i on being ba klit bright yellow.
3. Press the solo swit h again to un-solo the hannel.
6.5 The MON hannel:
The MON (monitor) hannel is a stereo hannel that an be be sour ed by any of the m108's available
2 h monitor inputs:
• USB 2.0 interfa e
• Aux pairs 1 – 4
The USB hannels are whatever stereo audio sour e is being sent to your m108 from your omputer's
USB audio buss, either from the omputer OS audio output or your from your DAW (see USB audio setup,
hapter 9).
The aux pairs will only be available if there is an option ard installed on the m108 whi h presents audio
inputs. Currently this would only be from the Dante network audio option module (see Dante Module
option, hapter 8).
6.6 Master Channel:
This hannel sets the overall level of the mixer output, from 0dB to OFF. The output of the mixer will be
sent to the headphones if the headphone sour e MIX is sele ted (see below). This hannel has a 'solo off'
m108 Owner's Manual page 16

swit h whi h dea tivates solo on all hannels, allowing you to hear all mixer hannels immediately with-
out having to manually un-solo individual hannels.
6.7 mon-sr (Monitor Sour e):
This menu is used to sele t whi h 2 h sour e is present at the monitor hannel. Options are: aux1-4 and
USB. To sele t the input you wish to monitor:
1. s roll the EDIT knob to the 'mon-sr ' menu, and press the knob to enter the sour e sele t mode.
2. S roll the EDIT knob until your desired sour e is sele ted.
3. press the EDIT knob to enter your sele tion.
4. To exit this sele t mode, you need to s roll the EDIT knob ounter- lo kwise until you rea h 'mon-
sr ', then press to exit.hp-sr (Headphone Sour e)
This menu is used to sele t whi h 2 h sour e feeds the headphone and ontrol room outputs. Options
are: aux pairs 1-4, USB and MIX. To sele t the sour e you wish to monitor with the headphones:
1. S roll the EDIT knob to the 'hp-sr ' menu, and press the knob to enter the sour e sele t mode.
2. S roll the EDIT knob until your desired sour e is sele ted.
3. Press the EDIT knob to enter you sele tion.
4. To exit this sele t mode, you need to s roll the EDIT knob ounter- lo kwise until you rea h 'hp-
sr ', press to exit.
7 Navigating and Using the Setup Menu
Be ause there are so many ways to use the m108, we have designed a very simple but powerful setup
menu for ontrolling and adjusting all available setup parameters.
7.1 To enter and navigate the setup menu:
1. Press and hold the PEAK CLR (setup) hardware swit h on the front panel. The display will hange to
show a verti al list of all available setup menu items.
2. Menu navigation mode - turning the EDIT en oder knob lo kwise will s roll up the list
numeri ally, ounter- lo kwise will s roll down the list numeri ally.
3. The sele ted list menu item will be in the verti al enter of the s reen, displayed between an
underline and overline and its brightness intensified.
4. On e the desired menu item has been sele ted, pressing the EDIT knob enters edit mode, whi h is
shown by the entire row of the menu item be oming ba k-lit by a ba kground gradient bar.
From here, items in the setup will have 2 options for making adjustments
1. In edit mode, turn the EDIT knob to s roll through the list of available settings (all of whi h are
des ribed in detail below). When the setting you desire is displayed, press the EDIT knob to enter
the se tion and exit edit mode. You will be returned to the setup menu navigation mode.
m108 Owner's Manual page 17

2. If the menu item you have sele ted reads 'press to onfig', then pressing the EDIT knob will open a
new panel spe ifi to that menu item with a separate array of editable items. These menu items
will be explained in detail below.
3. The m108 responds to parameter hanges in real time but the settings are not saved to non-
volatile memory until you exit from the setup menu.
7.2 The 16 setup menu items (listed in order):
1 - adc samplerate
This setting adjusts the ADC sample rate. To set the sample rate you wish to use:
1. Press the EDIT en oder to enter edit mode
2. Turn the knob to sele t the desired sample rate
3. Press the EDIT knob again to enter your sele tion and exit edit mode
The available options are:
• off
• 44.1kHz
• 48kHz
• 88.2kHz
• 96kHz
• 176.4kHz
• 192kHz
• usb – sele t this to have the sample rate automati ally set by the USB audio interfa e
• Dante - sele t this to enable the optional Dante interfa e. When Dante is enabled the sample rate is
set in the devi e onfiguration tab for the m108 in Dante Controller.
2 - adc clocksource
This setting sets whi h word lo k sour e the m108 ADC uses to operate. To set the lo k sour e you wish
to use:
1. Press the EDIT en oder to enter edit mode
2. Turn the knob to sele t the desired lo k sour e
3. Press the EDIT knob again to enter your sele tion and exit edit mode
The available options are:
• internal: uses the m108's internal os illator as the lo k sour e
• word: uses in oming external word lo k sour e onne ted to the word lo k in BNC onne tor on
the rear panel.
• word: 75Ω Same as above but with 75Ω termination
• Dante: uses in oming external word lo k sour e from the optional Dante Network Audio ard
m108 Owner's Manual page 18

3 - Dante ext. syn
This setting sele ts the lo k sour e for when the m108 is the Dante network lo k master. If the "Allow
Syn to External" he k box is he ked in Dante Controller, then the lo k sour e for the m108 will
swit h to the lo k sour e sele ted in the Dante ext. syn menu. To set your desired Dante ext. syn op-
tion:
1. S roll to the setup menu item #4 ' lo k output'
2. Press the EDIT en oder to enter edit mode
3. Turn the knob to sele t your desired option
4. Press the EDIT knob again to enter your sele tion and exit edit mode
Note that there an only be one lo k master on a Dante network. The available options are
• internal
• word
• word – 75 ohm
4 - clock output
This setting sets whi h word lo k sour e will be present at the WC OUT/THROUGH BNC onne tor on
the m108 rear panel. To set your desired lo k output setting:
1. S roll to the setup menu item #4 ' lo k output'
2. Press the EDIT en oder to enter edit mode
3. Turn the knob to sele t your desired option
4. Press the EDIT knob again to enter your sele tion and exit edit mode
The available options are:
• internal
• external
5 - digital format
Sets the AES3 output format to indi ate professional or onsumer in the digital stream. To set your de-
sired digital output format:
1. S roll to the setup menu item #5 'digital format'
2. Press the EDIT en oder to enter edit mode
3. Then turn the knob to sele t your desired format
4. Press the EDIT knob again to enter your sele tion and exit edit mode
The available options are:
• professional
• onsumer
m108 Owner's Manual page 19

6 - phones power up level
This option allows you to store a spe ifi level that the headphone output will return to every time the
m108 is powered on. To set your desired phones power up level:
1. S roll to the setup menu item #6 'phones power up level'
2. Press the EDIT en oder to enter edit mode
3. Turn the knob to sele t your desired option from 0 – 99
4. Press the EDIT knob again to enter your sele tion and exit edit mode
7 - meter peaks
The m108 signal meters will display a small line to indi ate the highest level (peak) a parti ular hannel
has a hieved. To set your desired meter peak setting:
1. S roll to the setup menu item #7 'meter peaks'
2. Press the EDIT en oder to enter edit mode
3. Then turn the knob to sele t your desired option
4. Press the EDIT knob again to enter your sele tion and exit edit mode
You an set these peak indi ators to do the following:
• off: signal peaks are not re orded or displayed
• de ay: the peak signal indi ator only remains for a short interval and then automati ally disappears
• hold: the peak signal indi ator is permanently displayed until a higher peak has been re orded or
the peak lear swit h is pressed
8 - display mode
The main mi preamp operating s reen has 7 different display modes that you an hoose between de-
pending on how you are using the system and what display information you would like to see on the
s reen as default. To set your desired display mode:
1. S roll to the setup menu to item #8 'display mode'
2. Press the EDIT en oder to enter edit mode
3. Turn the knob to sele t your desired option
4. Press the EDIT knob again to enter your sele tion and exit edit mode
The display mode options are:
• system: in this mode, all 8 mi preamp hannels are shown in a row, with the right side s reen area
displaying ADC sample rate, lo k sour e and lo k output.
• gain: in this mode, all 8 mi preamp hannels are shown in a row, with the right side s reen area dis-
playing the hannel name or number (if no name is entered), and the sele ted hannel's gain level
with large number.
• phones: in this mode, all 8 mi preamp hannels are shown in a row, with the left side s reen area
displaying the sele ted headphone sour e and headphone output level with a large number.
m108 Owner's Manual page 20