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Table of Contents
Summary of Contents for AMT Analoger ADG-1
- Page 1 100% Analog Bucket Brigade Delay User Manual Revision B Last Revision 5/03/2021...
- Page 2 Introduction Thank you for your purchase of Asheville Music Tool’s ADG-1 Analog Delay. This pedal, engineered by renowned analog delay designer Hawker, features two reissue Bucket Brigade Delay lines for up to 700mS of delay. It is coupled with a Low Frequency Oscillator, and uses control voltage topology to give you the best sound, features, and control available in any fully analog delay currently on the market.
- Page 3 About BBDs I am often asked what gives analog delays their characteristic sound. The answers I usually see given are not what make them sound different to me. A BBD (Bucket Brigade Delay) works by storing a momentary snapshot “sample” or charge in a capacitor isolated by a FET network. It passes this sample from one capacitor to the next via a bi-phase clock until it reaches the output.
- Page 4 With a fixed clock frequency, they can only take a sample step every 48 or 96KHz and step at that increment. This only simulates fractional delay and is not true fractional delay. The ear can perceive this difference and so it does not feel correct to the brain.
- Page 5 About the Firemen and the ADG-1 Artwork Our pedal artwork, drawn by artist Geoff Sebesta, is homage to Hawker’s past pedals and old modular synthesizers. The lines and boxes around function blocks lend themselves to classic modular synthesizer layouts, which were organized by function. You may notice the use of synthesizer terms such as “LFO, VCO, CV”...
- Page 6 Set up Use only standard, 9VDC REGULATED, center-negative power supplies rated for at least 200mA from a reputable vendor for all your Asheville Music Tools effects. Classic old style, rectified & filtered, but unregulated, supplies are not acceptable for use with this product. We like the Truetone™...
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Page 7: Getting Started
Note: If not using the expression input; be sure the expression switch is NOT SET TO THE TIME POSITION to start. We recommend setting it to AMT if not using this feature. To start, set the ADG-1 to the Home position as shown in the graphics to the right. -
Page 8: Operation
Operation The ADG-1 is laid out in homage to modular synthesizers with three main modules. They are the DELAY Module, the LFO (Low Frequency Oscillator) and the LEVEL Module. Let us look closer at these modules. DELAY MODULE The TIME knob adjusts the delay TIME: time from 35mS to 700mS. - Page 9 MIX MODULE The LEVEL modules provide level matching, wet/dry blending, and tonal control of the ADG-1. DRIVE: The DRIVE knob provides up to +23dB of drive and level matching as well as some attenuation for hot input signals. Unity gain is around 9:00.
- Page 10 LFO MODULE The Low Frequency Oscillator (LFO) module is a modulation source for animating your delay time and for varying of the pitch and time. Unlike traditional delays, our LFO uses exponential modulation for musical and balanced movement in a musical frequency domain, the way the ear and brain want to hear it.
- Page 11 CONTROL VOLTAGE or EXPRESSION SECTION: Using the EXP knob and an external control voltage or EXPression pedal with your ADG-1 will greatly increase the dynamic playing and tonal possibilities as well as expand the control range beyond the extent of the knobs.
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Page 12: Foot Switches
FOOT SWITCHES BYPASS FOOTSWITCH: Turns the effect on or off. The LED is lit when engaged. The switch is user selectable for true bypass or buffered bypass by a selector switch inside the ADG-1. TAILS / MOD FOOTSWITCH: Depending on the mode (set internally), this switch will either engage or disengage the LFO modulation or provide Tails (also known as Spill-Over or Trails). -
Page 13: Technical Overview
Technical Overview Utilizing over 400 carefully selected components, the entire ADG-1 was designed for a 100% analog signal chain. We began with a classic delay architecture using a pair of Xvive™ MN3005 reissue BBDs and a step up boost power supply to power our premium audio-grade op amps and high- tolerance, non-microphonic capacitors, providing performance, temperature &... -
Page 14: Functional Specifications
Functional Specifications: Note: All specifications subject to change at the whim of our overloads. Time, Feedback, Rate and Amount control range all extended with the use of Expression Pedal or control voltage input. Delay Time: 35mS – 700mS Bucket switch down (all BBDs), 17.5mS –... - Page 15 Electrical Specifications: (subject to change) Type: 100% Analog signal and control path Power: 9VDC @ <150mA. 75-125mA typical. Up to 250mA start up. Standard pedal center negative 2.1mm x 5.5mm barrel. Bypass: Switchable true bypass or JFET-buffered bypass with switchable tails ...
- Page 16 Presets: The following are ideas for setting your ADG-1. Since all analog products have some variability, the exact knob setting may be slightly different from that shown in these presets. Experiment and enjoy. Reverberant Lead: Subtly modulated long delay with overdrive. Great for lead licks.
- Page 17 Springy Bubbles: Silly gurgling nonsense. Have fun and don’t laugh too hard, especially if you dial up the AMOUNT more. Pro Tip: Use an expression pedal on the RATE or AMOUNT to get audio rate modulation. Adjust AMOUNT or flip the wave shape for stuttering warbles like a broken film projector (younger players, ask your parents about 16mm school projectors)
- Page 18 Tin Pan Alley. A unique hollow, peaky sound that is more tonal than delay. Sounds like you are at the end of a tunnel talking through an old telephone. (Modulation off) Square Jumps: Tune this by ear (using AMOUNT and TIME controls) for a bouncy, whimsical octave echo or a chaotic, atonal warble!
- Page 19 Lead Fattener: Make your solo stand out of the mix. Bonus points if you turn your amp to 11. (Modulation off) Alternatively, try a hair of modulation with RATE around 12:00 and just a hair on the AMOUNT knob Lofi Vibes: Take advantage of the ADG-1's lush filter to construct a lo- fi vibrato evocative of vintage recordings.
- Page 20 Tools To Inspire Your Creative Muse Proudly Designed, Manufactured, Machined & Assembled in the mountains of Western North Carolina Changelog Revision Date Notes Small updates and clarifications Rev B 4/30/2021 for Rev B PCB Production: Web Release: Rev A1 12/28/2020 Small formatting and typo fixes.