Diamond Quantum Leap User Manual
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Quantum Leap
Short delay toolbox covering flange, chorus, to 600 ms delay
User Manual
v1.11 • Oct. 8, 2012
INTRODUCTION
The Quantum Leap is a toolkit of short delays, offering the option of lo res delays,
flanging and chorusing effects as well as fixed comb filters - effects that are both great on
their own, and also as a useful ‘companion’ to other analog or digital delays.
By utilizing the same variable sample rate concept used in analog bucket brigade
modulation, and adding custom analog anti-aliasing and reconstruction filters and
companding, we’ve captured the essence of analog modulation and delays... in a small
footprint, with advanced control features, and standard 9V powering. First used in the
Memory Lane Junior, the Quantum Leap digital sampling engine’s sole function is to
copy, delay, and reproduce the delay path signal with no mathematical manipulation at
all* - and unlike standard audio codecs, there are no digital anti-aliasing and
reconstruction filters. All signal paths around the sampling engine (direct path, feedback
path, and everything before and after the digital sampler) are analog, paths carefully
designed to provide a unique sonic signature that is unmistakably Diamond.
We hope you’ll enjoy using this pedal as much as we have enjoyed designing it.
* well, almost no manipulation at all....in the QL’s Tap Delay mode there is a tiny bit of signal processing to
get the delay ‘wash’ sound.
Remember to protect your hearing and wear appropriate hearing protection when
playing loud…
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FEATURES
short delay ‘toolkit’, with modes for flange, chorus, comb filtering, and delays up to 600 ms
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multiple delay voicings, including a darker voiced delay, a unique harmonic delay, and foot
•
controlled pitch / delay ramping
tap tempo for LFO speed on flange/chorus, and delay time for the tap delay mode
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user selectable tap delay ‘hold down’ mode of either harmonic delays or dotted eighths
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adjustable modulation depth on delays
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analog signal paths surrounding a simple sample-delay-playout engine with special design
•
variable sample rate A/D and D/A convertors
user selectable True Bypass or Buffered with Delay Trails operation
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premium audio components, including Panasonic capacitors and 0.5% resistors
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bi-color LEDs provides visual indication of modes, LFO and delay times
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TapView (TM) allows the player to visually see the tap tempo speed on the ON/OFF LED
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while tapping
AutoDouble (TM) tap algorithm intelligently sets the delay rate twice as fast when tapping
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rates slower than the max delay time of 600 ms
standard 9V negative tip adapter ready, with ‘gig backup’ battery power life of 2 hours
•
compact Hammond 1590BB cast aluminum case (approx 4.7 x 3.7 x 1.2 inches)
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A NOTE ABOUT POWERING THE QUANTUM LEAP
The Diamond Quantum Leap is designed to be powered from either a 9V battery*(included),
standard 9V negative tip DC power adapter or from a multi pedal power supply. Current draw is
rated at a maximum of 70mA.
! *Please note that battery life with a standard 9V is limited to approximately 2.5 hours.
We recommend using a quality negative tip 9V power adapter designed for powering musical
accessories or a 9V negative tip feed from a dedicated pedal power supply.
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Name
Mode (TAP/FX
LED color)
SPEED
WIDTH
REGEN
MIX
Sparkle clean
Flange (green / yel-
low)
11 AM
3 PM
11 AM
1 PM
Throaty distortion (dis-
tortion pedal in front of
QL)
Flange (green / yel-
low)
12 noon
12 noon
12 noon
2 PM
Chorus nirvana
Chorus (green / red)
3 PM
5 PM
7 AM
1:30 PM
80’s dream
Chorus (green / red)
1 PM
12 noon
10:30 AM
12 noon
Slow 80’s
Chorus (green / red)
9 AM
3 PM
9 AM
12 noon
Faux Leslie
Chorus (green / red)
7 AM
1:30 PM
7 AM
1 PM
Distortion comb (put a
distortion pedal in front
of the QL)
Filter (solid yellow)
9 AM
N/A
12 noon
5 PM
Standard QL delay
Tap delay (flashing
green)
3 PM
11 AM
12 noon
12 noon
Ambient delay
Pitch ramp delay
(flashing red)
5 PM
10 AM
5 PM
12 noon
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QUICK START GUIDE
To get started quickly using the Quantum Leap, simply turn the unit on, bring SPEED, WIDTH,
REGEN and MIX to roughly noon on the dial, then toggle the MODE switch to a desired flange,
chorus, filter or delay effect. As SPEED, WIDTH, REGEN and MIX can be set to an almost
infinite number of possibilities across the multiple modes, here are a few ‘preset’ ideas (knob
numbers represent clock positions) to get started:
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