DFI Clockwork V2 Delay User manual

User Manual
1
Chapter 1 - OVERVIEW
In this second rendition, we’ve completely overhauled the original design of the
pedal to come up with a unique concept that packs a whole lot of useful features
and sound possibilities, whilst retaining the compact footprint. New features in-
clude presets capability, 6 new variation modes, and stereo inputs / outputs. The
overall delay algorithms have also been redesigned and improved.
Clockwork Delay V2 offers standard delay mode plus six variation modes. The
variation modes includes Tape, Lo-Fi, Ambient, and Multi-Head (Multi-Tap)
delays.
CLOCKWORK V2
D E L A Y
TableofContents
1. Overview1 - 2
2. Operation3 - 5
3. TapTempoFunction6 - 7
4. TheAlgorithms8-14
5. AutoRegenSweep15
Important - must read

2
The table below lists all available modes with their respective ‘PARAM’ knob
functions.
MODESPARAM
StandardModulation
TapeResonance
Lo‐FiModulation
AmbientPitch‐Shift
Multi‐Head(2‐heads)HeadsMatrix
Multi‐Head(3‐heads)HeadsMatrix
Multi‐Head(4‐heads)HeadsMatrix
Use this selector switch to choose between Tape, Lo-Fi, and Ambient (when
you’re in primary set) or between H2, H3, and H4(when you’re in secondary set)
See chapter 2 for details.
[T]
[L]
[A]
Secondary
Variations
[H2]
[H3]
[H4]
Primary
Variations
VariationLED

 Off:Standarddelaymode.
 Green:Primaryvariationset
(Tape,Lo‐Fi,Ambient)
 Red:Secondaryvariationset
(H2,H3,H4)

3
Chapter 2 - Operation
All features and operations of the pedal are accessible through the 2 footswitches.
Operation of the footswitches have been carefully designed to keep things as
simple and intuitive as possible.
Switching between Standard and Variation modes (T.L.A / H2.H3.H4)
1. Press both footswitches simultaneously.
Don’t worry about doing this while playing live, the state of variation can be stored
in presets. Position of the Variation selector switch determines which mode gets
activated (this information is also stored in presets).
Variationselectorswitch
VariationLEDEngageLED/TempoIndicator
[Preset/Bypass][Select‐Tap/Variation]

Switching between primary and secondary Variation Set
Primary set : T.L.A‐Tape, Lo-Fi, Ambient
Secondary set : H2.H3.H4‐2-heads, 3-heads, 4-heads
(Multi-Head / Multi-Tap delay)
Only one set can be activated at a given time.
To go back and forth between the two variation sets do the following :
1. Press and hold both footswitches until the Variation LED changes
its color and flashes 3x.
Saving a preset
1. Press [Select-Tap / Variation] to select the desired preset location.
2. Press and hold [Preset / Bypass] until the Engage LED flashes.
Loading a preset
1. Press [Select-Tap / Variation] to select the desired preset location.
2. Press [Preset / Bypass] to load the selected preset.
Presets are selected by going through each location in the ‘Up’ direction (1, 2, 3,
…), while going trough these steps the sound does not get updated until selection
is confirmed by pressing [Preset / Bypass].
Bypassing or Engaging the pedal
1. Press [Preset / Bypass].
When the pedal is in bypassed state, the tempo indicator (orange LED) is off.
4

5
Each variation set has its own preset space : so you have 4 available presets
when using the primary variation set, and another 4 presets when using the secon-
dary variation set.
T . L . A H2. H3. H4
Preset 1 Preset 1
Preset 2 Preset 2
Preset 3 Preset 3
Preset 4 Preset 4
For example, you can have preset arrangement like this :
T . L . A H2. H3. H4
Standard (slow mod) H2(pattern I)
Standard (medium mod) Standard
Tape H3(pattern I)
Lo-Fi H4(pattern II)
Let’s say the current sound is Standard(slowmodulaton),to switch to the H4
(patternII) sound do the following :
1. Switch to Secondary variation set.
2. Select preset location 4.
3. Confirm the selection.
Preset location 1 -
Preset location 2 -
Preset location 3 -
Preset location 4 -
VariationLED

 Off:Standarddelaymode.
 Green:Primaryvariationset
(Tape,Lo‐Fi,Ambient)
 Red:Secondaryvariationset
(H2,H3,H4)

6
Chapter 3 - Tap Tempo Function
The delay time can be set in relation to the tempo of the music by tapping on the
[Select-Tap / Variation] footswitch. Recall that the same footswitch is also used to
select preset locations, so how can we engage tap-tempo function without inad-
vertently making preset selection?
Note that whichever preset location you’re currently on, it takes a maximum of 3
moves to get to any other preset locations. Let’s say you’re on preset location 1,
then it takes 3 footswitch taps to get into preset location 4. Tapping the footswitch
one more time will take you back to where you started (the current preset loca-
tion).
With this consideration in mind, we’ve programmed the pedal so that the tap-
tempo function is engaged if more than 3 footswitch taps is registered. In other
words, you must tap at least 4x to initiate the tap-tempo function. The new
delay time will be updated immediately after the 4th tap.
23 4 1
1st tap 2nd tap 3rd tap
4th tap
Subdivision (tap-ratio)
When using the tap-tempo function, you can use the TIME knob to select one of
the four subdivision options. The TIME knob is partitioned into 4 region, where
each region represents a subdivision.
* Note that the subdivision setting is only relevant when using the tap-tempo func-
tion.
Preset location

7
TIME
3 Quarter-note
8th-note
8th-note Triplets
Dotted-8th
3
echo
echo
echo
echo
echo
echo
echo
echo
echo
echo
echo
8th-note
Triplets
8th-note
Dotted-8th
Quarter-note
Subdivisions
Tap Interval
Tips : Select “Quarter-note” if you want the echo interval to match the tap interval.
Select “8th-note” if you want the echo interval to be half the tap interval.

8
Chapter 4 - The Algorithms
Standard
This is a pristine digital delay with modulation. A touch of tone-shaping is applied
to keep the repeats from being ‘sterile cold’, while retaining clarity and definition.
Maximum delay time is 1000 ms (1 second).
PARAM knob is partitioned into 2 regions : the first half constitutes slow modula-
tion rate and the second half constitutes medium rate. The modulation Depth is
fully adjustable within each region (modulation depth increases as the knob is
turned clockwise). Thus you have modulation with adjustable depth and a choice if
two different rates.
Rate : MediumRate : Slow
minimum Depth
PARAM
minimum Depthmaximum Depth
maximum Depth

9
The Algorithms
Lo-Fi
This variation mode has a special voicing that mimics that of an analog delay. The
warm and lush repeats work great to thicken your guitar sound without getting in
the way of the dry sound. Maximum delay time is 1000 ms (1 second).
PARAM knob is partitioned into 2 regions : the first half constitutes slow modula-
tion rate and the second half constitutes medium rate. The modulation Depth is
fully adjustable within each region (modulation depth increases as the knob is
turned clockwise). Thus you have modulation with adjustable depth and a choice if
two different rates.
Rate : Slow
minimum Depth
PARAM
minimum Depthmaximum Depth
maximum Depth
Rate : Medium

10
The Algorithms
Tape
This mode is an emulation of the tape echo system that produces band-limited
echoes with a touch of saturation and delay time variation.
PARAM knob is partitioned into 2 regions : the first half constitutes normal stereo
and the second half constitutes ping-pong stereo. Feedback resonance is fully
adjustable within each region (resonance increases as the knob is turned clock-
wise).
* Stereo setup is required to hear the effect of ping-pong configuration.
Ping-PongNormal
minimum resonance
PARAM
minimum resonancemaximum resonance
maximum resonance

11
The Algorithms
Ambient
This variation mode blurs the line between delay and reverb. Repeats get more
diffuse with each iteration, and as REGEN knob is turned up the echoes wash out
into reverb-like ambience.
PARAM knob controls the type and level of a secondary pitch-shifted voice. The
first half of the knob range constitutes Perfect-fifth pitch interval and the second
half constitutes Octave interval. The voice level is adjustable within each region
(loudness increases as the knob is turned clockwise).
Perfect Fifth
minimum voice level
PARAM
minimum voice levelmaximum voice level
maximum voice level
Octave
Finally, the repeats bounce between the two output channels (ping-pong), result-
ing in a very wide stereo impression. As such, this mode works best in stereo
setup.
To summarize, this variation mode is about reverb-like ambience + pitch-shifted
voices + stereo rhythmic groove. There are lots of wonderful sound textures to be
discovered.

12
The Algorithms
H2(2-heads delay)
This is a model of tape delay with 2 “playback heads”. Each input sound event will
be played back twice at different delay times, and signals from the playback heads
are re-injected into the feedback loop, creating layers of warm and complex multi-
tap echoes. 2 choices of heads matrix configurations (tap patterns) are accessible
through the PARAM knob.
PARAM
C
B
D
A
I
Patterns
d r y
II d r y
echo
echo echo
echo
HeadConfiguration(tappatterns)
 A:PatternI‐normal
 B:ping‐pong
 C:PatternII‐normal
 D:ping‐pong

*AstheREGENknobisturneduphigher,atouch
ofreverb‐likeambiencestartstoappear
+
+
denotes “golden ratio” interval.
*
371 ms
The timing values shown here are not not fixed, they are adjustable via
the TIME knob. This graph is only meant to show the relative timings
between taps.
600 ms
450 ms 600 ms
denotes “dotted-eigth” interval.

13
The Algorithms
H3(3-heads delay)
This is a model of tape delay with 3 “playback heads”. Each input sound event will
be played back thrice at different delay times, and signals from the playback
heads are re-injected into the feedback loop, creating layers of warm and complex
multi-tap echoes. 4 choices of heads matrix configurations (tap patterns) are ac-
cessible through the PARAM knob.
I
Patterns
d r y
II d r y
echo echo
echo
echo
echo
echo
PARAM
C
B
D
A
HeadsMatrixconfiguration(tappatterns)
 A:PatternI
 B:PatternII
 C:PatternIII
 D:PatternIV

*AstheREGENknobisturneduphigher,atouchof
reverb‐likeambiencestartstoappear,andthestereo
spreadoftheechoesincreases.
III d r y echo echo
echo
IV d r y echo echo
echo
600 ms
600 ms
600 ms
600 ms
400 ms
300 ms
429 ms
480 ms
300 ms
200 ms
125 ms
240 ms
The timing values shown here are not not fixed, they are adjustable via
the TIME knob. This graph is only meant to show the relative timings
between taps.

14
The Algorithms
H4(4-heads delay)
This is a model of tape delay with 4 “playback heads”.
4 choices of head configurations (tap patterns) are accessible through the PARAM
knob.
PARAM
C
B
D
A
HeadsMatrixconfiguration(tappatterns)
 A:PatternI
 B:PatternII
 C:PatternIII
 D:PatternIV

*AstheREGENknobisturneduphigher,atouchof
reverb‐likeambiencestartstoappear,andthestereo
spreadoftheechoesincreases.
I
Patterns
d r y
II d r y
echo echo
echo
echo
echo
echo
III d r y echo echo
echo
IV d r y echo echo
echo
600 ms
600 ms
600 ms
600 ms
500 ms
500 ms
500 ms
400 ms
200 ms
200 ms
100 ms
200 ms
echo
echo
echo
echo
400 ms
300 ms
300 ms
300 ms
The timing values shown here are not not fixed, they are adjust-
able via the TIME knob. This graph is only meant to show the
relative timings between taps.

15
Chapter 5 - Auto Regen Sweep
When you activate this feature the pedal automatically sweeps the Regeneration
parameter to the maximum value, hold it there, and sweeps it back to the previ-
ously set value - It’s like having someone turns the REGEN knob while you’re
playing. Used judiciously, this feature introduces useful dynamic elements to the
delay texture.
Press and hold [Select-Tap / Variation].
REGEN
The Regeneration parameter gradually
sweeps to maximum value (as if someone
slowly turns the Regen knob all the way
up).
As long as you hold the footswitch down, the
Regen parameter stays at its maximum
value and both LEDs keep on flashing.
REGEN
When you finally release the footswitch, the
Regen parameter slowly sweeps back to
the previously set value.

Email : [email protected].
Web : www.gfisystem.com
GFI System
Jakarta, Indonesia.
Specifications :
 Input impedance : 1 MOhm.
 Output impedance : 500 Ohm.
 Current consumption : ~ 100 mA.
 Weight : 0.6 Kg (1.2 lbs).
 Dimension : 12 (L) x 6.5 (W) x 3.6 (H) cm
 Powered by an external 9V DC Adaptor (sold separately).
This product is designed and manufactured by :
Features :
 Precision and versatile delay in a compact pedal.
 Fully programmable (4 x 2 presets).
 Normal delay + 6 variation modes.
 Tap-Tempo (with 4 subdivision option).
 Stereo input and output.
 24-bits signal processing.
 Analog Dry-thru.
 Delay trails persistence.
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