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100% Analog Bucket Brigade Delay User Manual Version 1.0 - Draft Last Revision 11/20/2020...
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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.
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About BBDs I am often asked what gives analog delays their characteristic sound. The answers I usually see given are not what makes 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 BBD clock until it reaches the output.
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With a fixed clock frequency, they can only take a sample every 48 or 96KHz and step at that increment. They can only simulate fractional delay and cannot do true fractional delay. The ear can perceive this and so it does not feel right to the brain.
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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 how classic modular synths were organized by function.
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Set up Use only standard, REGULATED, 9VDC, 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™...
Getting Started Let’s explore the range of controls of your ADG-1. Connect your guitar or other instrument to the INput jack. Connect an amplifier to the OUTput jack, and if you have an expression pedal (or 0- 5V control voltage source like a synthesizer output), connect it to the EXPression input.
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’s look closer at these modules. DELAY MODULE The Time knob adjusts the delay TIME: time clock from 35mS to 700mS.
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MIX MODULE The Level module provides 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 at about 9:00 but try cranking it for some soft clipping and limiting or to drive the BBDs hard.
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LFO MODULE The Low Frequency Oscillator (LFO) module is a modulation source for animating your delay time and varying 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.
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CONTROL VOLTAGE or EXPRESSION SECTION: Using an external control voltage or EXPression pedal with your ADG-1 will greatly increase your dynamic playing and tonal possibilities as well as expand the control range beyond the extent of the knobs. Use a standard 10-50K linear expression pedal that takes the +5V voltage supplied on the ring jack and outputs the control voltage on the tip, or use a 0-5V external CV voltage from a Eurorack module, Synthesizer, DAW or similar source.
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).
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 power supply to power our premium audio-grade op amps and high- tolerance, non-microphonic capacitors, providing performance, temperature stability, low noise and maximum headroom.
Functional Specifications: Note: All specifications subject to change. 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 – 350mS with switch up. ...
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Electrical Specifications: (subject to change) 100% Analog signal path Switchable true bypass or JFET-buffered bypass with switchable tails Power: 9VDC @ <150mA (80mA Nominal) Expression / CV input. TRS input assignable to Time, Feedback, Mod Amount, or Mod Rate (CV range is 0-5V). Ring supplied current limited 5V.
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Tools To Inspire Your Creative Muse Proudly Designed, Manufactured, Machined & Assembled in the mountains of Western North Carolina Changelog Revision Date Notes Production Release – shipped Rev A xx/xx/2020 with first Rev A units. Prototype Manual released Rev 1 11/20/2020 before product shipping Visit our website for more information, mods, hacks, and presets.
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Presets: The following are ideas of settings for your ADG-1. Since all analog products have some variability the exact knob setting may be slightly different than shown in these presets. Experiment and enjoy. Reverberant Lead: Subtly modulated long delay with overdrive. Great for lead licks.
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Springy Bubbles: Silly gurgling nonsense. Have fun and don’t laugh to 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)
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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! Tape Wash: Bright repeats fade...
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Lead Fattener: Make your solo stand out of the mix. Bonus points if you turn your amp to 11. (Modulation off) Lofi Vibes: Take advantage of the ADG-1's lush filter to construct a lo-fi vibrato evocative of vintage recordings. Slap Back Delay: Short delay doubling.
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