Focusrite Saffire LE User manual

Rev 1.0

nIntroduction
nFront panel facilities and controls
nRear Panel Connections
nSaffireControl LE
nRecording using a microphone (mono or stereo)
nRecording line level sources (mono or stereo)
nRecording a guitar or bass directly
nRecording a digital (S/PDIF) source
nConnecting Speakers
nManaging a recording session with SaffireControl LE
How to set up an input mix on the monitors/headphones
How to set up a playback track mix on the monitors/headphones
Blending between inputs and playback tracks on the monitors/headphones
nDirect Audio Streaming to the Saffire LE Outputs: Soundcard (S/CARD) mode
nDirect AC3/DTS streaming to the RCA Output
nControl and Linking of Output Levels
nFloat and Shrink Modes
nSetting the Sample Rate and Synchronising to the S/PDIF In
nChanges to GUI at 88.2/96kHz
nMIDI
nSaffire Plug-in Suite
EQ
Compression
Reverb
Amp Sim
nSaffire Signal Flow Diagram
nTroubleshooting
nSpecifications
nWarranty
nAccuracy
nCopyright

nIntroduction
Saffire LE is the second addition to the now highly acclaimed range of Firewire audio interfaces from
Focusrite, one of the most prestigious names in the recording industry. With a total of 6 Inputs and 8 Outputs,
the Saffire LE should satisfy all your recording and monitoring needs.
Four of the six inputs are analogue, comprising two expertly designed Focusrite pre-amps and two additional
balanced inputs, switchable between Line and Instrument level signal – just plug in your guitar and play. On
the digital side, unrivalled conversion and 24-bit/96kHz processing ensure professional signal quality, with
S/PDIF connections making up the remaining stereo inputs and outputs.
On the rear panel are 6 analogue Outputs, ideally suited to 5.1 surround mixing or playback, as well as MIDI
I/O and a digital RCA port that can stream digital surround (AC3/DTS) directly from DVD playing software. The
hardware is accompanied by a free software application called SaffireControl LE, which provides a multitiude
of monitoring and setup options, as well as the popular suite of Saffire VST/AU plug-ins for processing in the
mix. Having such comprehensive features readily accessible, Saffire LE makes conducting a modern
recording session easy and fun.

nFront panel facilities and controls
1. Line/Instrument Gain Switches for Analogue Inputs 1 (above) and 2 (below)
If a 1/4” Jack (TRS or TS) is connected to either of the LINE IN sockets below, then
these switches can be used to select an appropriate gain calibration. If a Guitar is
plugged in then ensure that the yellow INST LED is lit, or if recording the analogue
output of a synthesizer or mixer for decks then make sure the green LINE LED is lit.
2. Gain Controls for Analogue Inputs 1 (above) and 2 (below) with O/L (Overload) LEDs
These two knobs can be used to set the gain (level) of the analogue inputs,
whether recording a mic, line or instrument source. Whilst receiving a signal from
the source by the artist singing or playing, rotate the corresponding knob clockwise
until a suitable level is heard. Make sure that the O/L LED does not illuminate as
this means that the signal level is too high and will clip.
3. O/L (Overload) LEDs for Inputs 3 (above) and 4 (below)
These two LEDs will illuminate if the signal for the corresponding input
(connected on the rear panel) is too high. Turn down the level on the connected
device if either of these LEDs illuminates.
4. S/PDIF IN LED
This LED indicates that a valid S/PDIF connection is received at the RCA Input on
the rear panel.
5. MONITOR (O/Ps 1/2) Level Control
This knob provides a hardware level control for the Monitor Outputs: Analogue
Outputs 1 and 2 on the rear panel.
6. Headphones Output with separate Gain Dial
This 1/4” Jack socket allows Headphones to be connected for separate monitoring
during a session. This signal is the same as that sent to Analogue Outputs 3 and 4,
the mix for which can be set using the SaffireControl LE software.
7. Line/Instrument (TRS/TS Jack) Inputs for channels 1 (left) and 2 (right)
These 1/4” Jack sockets allow a balanced or unbalanced Line level signal or an
Instrument like a Guitar or Bassto be plugged directly into the front panel. Set
an appropriate gain calibration (LINE or INST) using the switches at the top of
the fascia.
8. Global Phantom Power Switch
This switch can be used to apply +48V (Phantom Power) to a microphone
connected to either of the XLR inputs below. Check the Recording using
amicrophone section for more details on Phantom Power.
9. Microphone (XLR) Inputs for channels 1 (left) and 2 (right)
These two inputs allowup to two microphones to be plugged into the front
panel, for recording mono or stereo sources.
1
1
2
2
5
5
6
6
7
7
8
8
9
9
3
3
4
4

Saffire LE
USER MANUAL
nRear Panel Connections
1. Line/Instrument (TRS/TS Jack) Inputs for channels 3 (below) and 4 (above)
These 1/4” Jack sockets allow a balanced or unbalanced Line level signal or an
Instrument like a Guitar or Bass to be connected. If plugging in an Instrument then
make sure that the High Gain Switch for the corresponding Input is activated within
the SaffireControl LE software. See the SaffireControl LE section for more details.
2. External PSU Input
This socket is for powering the Saffire LE using the supplied external power
supply. This is only necessary if Firewire bus powering is not available, for example
if the connected computer only has a 4-pin Firewire port.
3. S/PDIF I/O
These RCA connectors are for receiving or transmitting a consumer digital audio
(S/PDIF) signal. With the AC3 THRU switch activated in SaffireControl LE, the RCA
Output can be used to directly stream an AC3 or DTS signal from a software DVD
player to a home surround studio setup. See the Direct AC3/DTS streaming to the
RCA Output section for more details.
4. MIDI I/O
These standard MIDI ports allow MIDI data to be received from and transmitted
to external equipment, routing through your sequencer using the Saffire LE’s
Firewire interfacing. Alternatively, if the Saffire’s MIDI In is connected to a
controller keyboard’s MIDI Out and the Saffire’s MIDI Out is connected to a sound
module or rack synth’s MIDI In, activating the MIDI Thru switch in the SaffireControl
LE software will enable the MIDI data to pass from the controller keyboard to the
sound module.
5. 2 6-pin Firewire 400 Ports
These ports allowconnection to the computer for streaming of data and (if
connected to an identical type of Firewire port, rather than a smaller 4-pin port)
supply of power to the unit. Either port can be used for this purpose, leaving the
additional port free for connecting to other Firewire equipment (e.g. hard drives)
should the Saffire be using up the only available Firewire port on the computer.
The natureof Firewire connectivity means that chaining equipment in this way is
possible and will act as if the equipment is connected directly to the computer
through separate Firewire ports.
6. 6 Balanced Line Outputs: +4dBu, TRS Jack
These sockets are Saffire LE’s Analogue Outputs, labeled accordingly for
5.1 surround: Left, Right, Centre, LeftSurround, RightSurround and
LowFrequencyEffects. If recording, then connect Monitors to Outputs 1 and 2
and Headphones to the front panel socket (Outputs 3/4) and use the software
to create independent mixes for each. If mixing in surround or wanting to stream
multiple channels of audio directly to the hardware outputs from your sequencer,
then connect speakers to the relevant sockets and activate the S/CARD switch in
the SaffireControl LE software.
1
1
6
6
2
2
3
3
4
4
5
5

nSaffireControl LE
The accompanying software SaffireControl LE is the means of setting up independent latency free mixes for
monitors and headphones, during recording sessions, as well as offering a host of other routing and setting
options. There are two main modes of operation, both with activating switches: TRACK (tracking/recording) is
the default mode and the one to use when recording and creating Input/Playback mixes on Outputs 1-4, and
S/CARD (soundcard) is a preset mode where Saffire LE behaves like a standard 8-out soundcard, routing
Outputs 1-8 in the sequencer straight to Outputs 1-8 of the Saffire LE hardware. To learn more about S/CARD
mode, read the Direct Audio Streaming to the Saffire LE Outputs: Soundcard (S/CARD) mode section later
in the User Guide.
Here is a diagram of the SaffireControl LE GUI:
Each section of SaffireControl LE is explained in greater depth in relevant sections of the User Guide.
Levels of Inputs on O/Ps 1/2 (Monitors) Stereo Link Switch
Pan Pot
Levels of Inputs on O/Ps 3/4 (Headphones) Software and Hardware SettingsAnalogue
Output Level
and Mixing
Controls Levels of Playback Tracks on
O/Ps 3/4 (Headphones)
Levels of Playback Tracks on O/Ps 1/2 (Monitors)

nRecording using a microphone (mono or stereo)
Torecord a mono source like a vocalist or guitar player, simply plug a microphone into the left (Input 1)
or right (Input 2) hand XLR socket on the front of the Saffire hardware and press the +48V (phantom power)
button if required. Phantom power is only necessary if using a condenser microphone; almost all dynamic
microphones will be unaffected, but ribbon microphones (much less common and more expensive
microphones) may be damaged.
Make sure that nothing is connected to the corresponding Line Input on the front of the Saffire LE
hardware as this will mean that the XLR input below is bypassed.
Now get the artist to play or sing and set the level of the input using the gain adjustment knob on the front
panel. Rotate the dial clockwise to increase the level, making sure that the O/L LED on the hardware never
illuminates as this indicates that the level is exceeding the maximum level of the digital converter (clipping
point). For an even easier indication of level, observe the level of the meter below Input 1 or 2 on the left of
the SaffireControl LE software GUI, as shown:
This signal will now appear as Saffire LE Input 1 or Input 2 (depending on which socket the microphone
is connected to) within your sequencer/recording application.
To record using a stereo pair, simply connect microphones to both Inputs 1 and 2 and set the Gain dials for
both Inputs on the front of the hardware to the same level, observing the Input meters in the SaffireControl
LE software, shown above.
Level of Input 1
(Recorded level)
Level of Input 2
(Recorded level)

nRecording a line level source (mono or stereo)
All four of the analogue inputs can be used to record a line level source, such as the analogue output of a
mixer or a hardware synth. This means that some decks could be permanently connected to Inputs 3 and 4
onthe rear panel, whilst Inputs 1 and 2 where free to use for recording vocal or instrumental parts.
To record using Inputs 1 and/or 2, plug 1/4” TRS (balanced, but TS/unbalanced could be used yielding a
slightly lower level) Jacks into either or both of the LINE IN sockets on the front panel. This will automatically
bypass any microphones that may be connected to the XLR Inputs below. Now make sure that the green
LINE LED is illuminated in the corresponding section(s) at the top of the front panel.
Now send a signal by starting a turntable or playing the synth etc. and set the level of the input(s) using the
gain adjustment knob on the front panel. Rotate the dial clockwise to increase the level, making sure that the
O/L LED on the hardware never illuminates as this indicates that the level is exceeding the maximum level of
the digital converter (clipping point). For an even easier indication of level, observe the level of the meter
below Input 1 or 2 on the left of the SaffireControl LE software GUI, as shown:
If recording a stereo signal then make sure that the Gain dials for both Inputs on the front of the hardware
are set to the same level, observing the Input meters in the SaffireControl LE software, shown above.
This signal will now appear as Saffire LE Input 1 and/or Input 2 (depending on which socket(s) the line
level signal is connected to) within your sequencer/recording application.
If recording using Inputs 3 and/or 4, plug 1/4” TRS (balanced, but TS/unbalanced could be used yielding a
slightly lower level) Jacks into either or both of the sockets in the top left of the hardware’s rear panel. Now,
when sending a signal to the Inputs, observe the O/L LEDs for Inputs 3 and 4 on the front of the hardware. If
they are illuminating, check that the High Gain switch/es is/are not activated within the SaffireControl LE
software’s GUI. These switches should only be used if the signal is an Instrument (Guitar or Bass connected
directly) or an extremely low line level source. If the level is too loud and the High Gain switch(es)
is/arenot activated, turn down the level of the signal sent to Saffire LE on the sending device.
This signal will now appear as Saffire LE Input 3 and/or Input 4 (depending on which
socket(s) the line level signal is connected to) within your sequencer/recording application.
Level of Input 1
(Recorded level)
Level of Input 2
(Recorded level)

nRecording a guitar or bass directly
All four of the analogue inputs can be used to record an Instrument, such as a Guitar or Bass plugged in
directly without using an amp.
To record using Input 1 or 2, plug a 1/4” TS Jack into either of the LINE IN sockets on the front panel, left for
Input 1 and right for Input 2. This will automatically bypass any microphones that may be connected to the
XLR Inputs below. Now make sure that the yellow INST LED is illuminated in the corresponding section at
the top of the front panel.
Now play the Instrument and set the level of the input using the gain adjustment knob on the front panel.
Rotate the dial clockwise to increase the level, making sure that the O/L LED on the hardware never
illuminates as this indicates that the level is exceeding the maximum level of the digital converter (clipping
point). For an even easier indication of level, observe the level of the meter below Input 1 or 2 on the left of
the SaffireControl LE software GUI, as shown:
This signal will nowappear as Saffire LE Input 1 or Input 2 (depending on which socket the Instrument is
connected to) within your sequencer/recording application.
If recording using Input 3 or 4, plug a 1/4” TS Jack into either of the sockets in the top left of the hardware’s
rear panel, below for Input 3 and above for Input 4. Now, activate the High Gain switch for that Input in the
SaffireControl LE software’s GUI, as follows:
Now play the Instrument and observe the O/L LEDs for Inputs 3 and 4 on the front of the hardware.
If they are illuminating, turn down the level on the Instrument.
This signal will now appear as Saffire LE Input 3 or Input 4 (depending on which socket the
Instrument is connected to) within your sequencer/recording application.
Level of Input 1
(Recorded level)
Level of Input 2
(Recorded level)
High Gain Switch for Input 4 –
engage if an Instrument is connected
High Gain Switch for Input 3 – engage if an Instrument is connected

nRecording a digital (S/PDIF) source
Ifwanting to record using some hardware with a S/PDIF Out, then a phono cable can be linked from the
hardware to the S/PDIF (RCA) In on the rear of the Saffire LE hardware. Once a valid S/PDIF signal is
received, the S/PDIF IN LED on the front of the Saffire LE hardware will illuminate. Make sure that the
sample rate of the S/PDIF signal matches that in SaffireControl LE and in the session the audio is being
recorded to.
This signal will appear as Inputs 5 and 6 within your sequencer/recording application. It is normally a good
idea to lock Saffire LE to the S/PDIF signal to synchronize devices and ensure no problems occur. To do this,
activate the EXT switch in the bottom right of the SaffireControl LE GUI, as follows:
The LED will light and LOK will show when Saffire LE is correctly synchronized.
External Sync Switch –
engage to lock to S/PDIF In

nConnecting Speakers
Onthe rear panel are balanced (TRS) Jack outputs 1-6 for connecting directly to speakers or an amp
(depending on whether the speakers are powered or not). Outputs 1 and 2 are the Monitors signal so if using
astereo pair of speakers then connect them to these sockets. Now, the SaffireControl LE software can be
used to create a latency-free mix of inputs and playback tracks using the top rows of faders in the GUI.
The level of the Monitors is controlled by the top dial in the centre of the SaffireControl LE software GUI,
and then by the MONITOR dial on the front of the Saffire LE hardware.
If using a surround setup requiring analogue signals then outputs 1-6 are labeled for 5.1 surround,
so simply connect the relevant source to the corresponding speaker using the names on the rear panel
(left, right, centre etc.).
The levels of the analogue outputs can be controlled individually using the three dials in the centre of
the SaffireControl LE GUI. Alternatively, if wanting to adjust the levels of all 6 Outputs simultaneously,
activate the CTRL LINK switch in SaffireControl, which links all three dials in the software providing
one control for all.
If using a surround setup requiring an encoded digital signal (AC3 or DTS), connect the S/PDIF (RCA)
Output on the rear panel to the input of the surround decoder then activate the AC3 THRU switch within
the SaffireControl LE software. The Saffire LE can now be used to directly stream the encoded signal to
your surround setup. For more details, read the Direct AC3/DTS streaming to the RCA Output section of
this Guide.

nManaging a recording session with SaffireControl LE
SaffireControl LE allows you to create independent latency free mixes of inputs and playback tracks for the
monitors and headphones, so that the engineer and artist can have the specific levels they want to help the
session run smoothly. Be aware that if recording at 88.2/96kHz then the number of mix options is reduced,
see the Changes to GUI at 88.2/96kHz section for details.
nHow to set up an input mix on the monitors/headphones
The six faders on the left of the GUI relate to Inputs 1-6 of the Saffire LE, 1-4 being the analogue Inputs
and 5 + 6 being the S/PDIF Input on the rear panel. The faders on top are the mix of Inputs for the Monitors
(Outputs 1/2) and the faders below are the mix for the Headphones (Outputs 3/4).
If using stereo signals, activate the stereo button for the corresponding Inputs (located in between the pan
pots for each pair of faders), which links the level of both and sets the pan pots to L and R. Now use the
faders to set specific levels of each Input.
If you are not hearing any of the Inputs on the Monitors or Headphones then make sure that the
corresponding INPUT MIX-P/BACK MIX slider isn’t in the extreme right position, where no Inputs are heard.
Read the Blending between inputs and playback tracks on the monitors/headphones section for details.
nHow to set up a playback track mix on the monitors/headphones
The right hand side of the SaffireControl LE GUI has two sets of four (stereo) faders, each set representing
the levels of Outputs 1-8 from the sequencer/recording platform. For example, any stereo track within the
sequencer that’s routed to Saffire Outputs 5/6 will appear on the third fader from the left (S/W 5/6) on each
set – it won’t go directly from the sequencer to the Saffire LE hardware Outputs unless the S/CARD switch
is activated or SaffireControl is correctly set up. This way, the pre-recorded audio (playback tracks) can be
blended with the inputs tocreate latency free mixes whilst recording.
The set of faders on top are the playback mix for the Monitors (O/Ps 1/2) and the faders below are the
playback mix for the Headphones (O/Ps 3/4). When recording, route the drums, melodies and other backing
tracks to different Saffire Outputs within the sequencer so the specific levels for the Monitors/Headphones
can be set accordinglyhere.

nBlending between inputs and playback tracks on the monitors/headphones
Once the Input Mix and Playback Mix have been created for Monitors and Headphones, the sliders in the
centre of the GUI can be used to blend between both mixes. The top slider relates to the Monitors whilst the
bottom slider is for the Headphones, as follows:
Setting either slider to the extreme right position will mean only Playback tracks will be heard on that stereo
pair of Outputs. Then, moving the slider to the left will add increasing amounts of Inputs and decrease
Playback tracks until, in the extreme left position, only Inputs are heard.
Crossfader for Outputs 1/2 (Monitors)
Crossfader for Outputs 3/4 (Headphones)

nDirect Audio Streaming to the Saffire LE Outputs: Soundcard (S/CARD) mode
The S/CARD switch within SaffireControl LE is a one-click solution to sending audio directly from your
sequencer to the Saffire LE hardware outputs. Activating the switch sets both of the INPUT MIX-P/BACK MIX
sliders to the extreme right position, so that no Inputs are heard, and then turns all S/W faders down apart
from the corresponding one, which is set to maximum. In other words, the Monitors (the upper row of S/W
(playback track) faders) only has the S/W 1/2 fader up as these faders relate to O/Ps 1/2 of Saffire LE.
Therefore, the lower row of S/W faders (relating to the Headphones) only has the S/W 3/4 fader up as
these relate to O/Ps 3/4 of Saffire LE.
Similarly, although not visibly within the SaffireControl LE software GUI, only sequencer tracks routed to
Saffre LE Outputs 5/6 and 7/8 will be sent to Outputs 5/6 (Analogue) and Outputs 7/8 (SPDIF), respectively.
To return to recording/tracking mode, simply activate the TRACK switch directly below the S/CARD switch
within SaffireControl LE. This will return to the previous session settings.
Sliders in extreme
right position
(just Playback tracks) Only S/W 1/2 fader up (only
audio routed to O/Ps 1/2
within sequencer goes to
O/Ps 1/2 of Saffire LE)
Only S/W 3/4 fader up (only
audio routed to O/Ps 3/4
within sequencer goes to
O/Ps 3/4 of Saffire LE)

nDirect AC3/DTS streaming to the RCA Output
Ifusing a home surround speaker setup that requires an encoded digital signal (AC3 or DTS), then the
S/PDIF (RCA) Output on the rear of Saffire LE can be used to stream the digital surround signal directly from
your software DVD Player. Simply attach a phono cable from Saffire LE’s S/PDIF Out to the input of your
surround decoder and then activate the AC3 THRU switch within the SaffireControl LE GUI, as follows:
Saffire LE can now be selected as the audio interface within the DVD Playing software and then used to
directly stream the encoded signal to your surround setup.
AC3 THRU switch –
engage to stream AC3/DTS
signal to S/PDIF Out

nControl and Linking of Output Levels
The centre of the SaffireControl LE GUI features the level controls for the Analogue Outputs (1-6), as follows:
In addition to Mute switches, O/Ps 1/2 also offer a Mono switch for making the signal Mono, as well as a Dim
switch for reducing the level by 12dB. If you want to send the O/Ps 1/2 signal to the S/PDIF Out for carrying
out a digital transfer then the switch labelled S/PDIF, below the Gain dial for O/Ps 1/2, should be active.
If using the SaffireLE to playback or mix in surround sound (using the analogue outputs) where one
level control is required for all, activate the CTRL LINK switch in the SaffireControl LE GUI, as follows:
This will link the three Gain dials in the centre of the GUI so that adjusting one will modify them all,
providing a single method for increasing/decreasing the level of all analogue outputs.
Mix crossfader for
O/Ps 1/2 (Monitors)
Level controls for O/Ps 1/2
Sends O/Ps 1/2 to S/PDIF Out
Level controls for O/Ps 5/6
Level controls for O/Ps 3/4
Mix crossfader for
O/Ps 3/4 (Headphones)
CTRL LINK switch – engage to link the
Level controls for all Analogue Outputs
(in the centre of the window)
Mono switch
Mute switch
Mute switch
Meters for O/Ps 1/2
Meters for O/Ps 3/4
Dim switch
Mute switch

nFloat and Shrink Modes
The SHRINK switch in the SaffireControl LE GUI reduces the size of the software window to a compact
format where only the central OUTPUT MIX section and SaffireControl LE settings switches are available,
asfollows:
Furthermore, the FLOAT switch activates a mode where the SaffireControl LE window is always visible so
that, even when editing in your sequencer, the interface settings can always be seen. SaffireControl LE will
FLOAT in normal or ‘shrunken’ modes. Whilst shrunken, an EXPAND switch is available for returning the
window to normal size as shown above.
EXPAND Switch - activate to return
the window to normal size
FLOAT Switch - activate to make
the window permanently visible.
Click again to deactivate

nSetting the Sample Rate and Synchronising to the S/PDIF In
The bottom right of the SaffireControl LE GUI displays the sample rate and allows it to be selected. To
set a sample rate, simply click on the LED beside it, which will illuminate once selected. If the Saffire LE
is currently being used to record then a sample rate cannot be selected and IN USE will be illuminated,
as follows:
If wanting to synchronise to an external source (via the S/PDIF In signal), which is normally advisable when
recording a S/PDIF signal, then press the EXT LED, which will illuminate once selected. Saffire LE will only
be correctly synchronised to this source if LOK is illuminated next to it. If not, make sure that the sample rate
of the incoming S/PDIF signal is the same as the one set in this window.
EXT sync switch –
engage to lock Saffire LE
to its S/PDIF In
Click on LED next to
value to select that sample rate
This illuminates when the sample
rate can’t be changed as the Saffire
is in use with a session
This illuminates when the Saffire LE
is correctly synchronised

nChanges to GUI at 88.2/96kHz
When working at higher sample rates, the SaffireControl LE GUI has some reduced functions. Only one
generic Input Mix can be created for both Monitors and Headphones, using the 6 Input faders on the left,
whilst only individual levels of S/W tracks 1/2 and 3/4 can be set on the Playback Track side, as follows:

nMIDI
Saffire LE operates as a MIDI interface with one input and one output. A MIDI controller keyboard or similar
device can be connected to the MIDI In, whilst a rack synth or multiple instruments (via a MIDI splitter) can
beconnected to the MIDI Out using standard MIDI cables, as follows:
SaffireLE can operate in one of two possible MIDI modes. The state of the MIDI THRU switch in
SaffireControl LE determines which MIDI mode will be used, as follows:
Normal MIDI Mode (switch inactive)
This mode should be used when wanting to send MIDI signals from a controller keyboard to the sequencer,
from where MIDI data can also be sent to any external devices, if required. This mode is necessary when the
sequencer is running, because it will prevent doubling of notes that occur when the same MIDI information
is transmitted by both the input device and the sequencer.
MIDI THRU Mode (switch active)
In this mode, all MIDI data received at Saffire LE’s MIDI In is routed directly to the MIDI Out. This mode
is designed for simply passing MIDI through Saffire LE. This may be useful when no sequencer is running,
because you don t need to route MIDI data in and out of you Mac or PC..
MIDI receiving device
(SuperNova II Rack - not included)
MIDI Out
To Mac
or PC
2way
MIDI traffic
MIDI In
MIDI Transmitting device
(Novation ReMOTE 25 - not included)