Keeley HALO Andy Timmons Dual Echo Instruction Manual
Introduction
The Keeley HALO Andy Timmons Dual Echo is a modulated dual echo sound effect pedal, developed in collaboration with Andy Timmons. It offers a unique tape-style echo with modulation, saturation, and compression, providing stunning stereo and pristine sound quality. The pedal allows for programming and saving custom sounds as presets, with the ability to switch between two delay sides (A and B) on the fly. It includes various rhythmic delay options such as quarter note, dotted eighth, stereo rack mount analog delay, and vintage multi-head tape echo.
"At long last, I have my ultimate dual echo in a single pedal!" - Andy Timmons
Primary Controls
The primary controls on the HALO pedal are:
- TIME: Sets the length of delay from 5ms to 1500ms.
- LEVEL: Sets the level of the delay.
- FDBK (Feedback): Sets the regeneration (number of repeats) of the delay. Pressing the FDBK knob enters 'Preset Mode'.
- RATE: Sets the rate of modulation of the delay from 0.1Hz to 10Hz.
- DEPTH: Sets the amount of modulation of the delay.
- TOGGLE SWITCH: Pushed to the right, it advances through the HALO's 4 Preset Banks.
- STOMP SWITCH A: Turns on or off Side A of the HALO.
- STOMP SWITCH B: Turns on or off Side B of the HALO.
- STATUS LIGHTS: Illuminate when a knob is moved from its preset position. Turning a knob until the status LED turns off returns it to the original knob position. Upper A & B lights mirror stomp switch indicators and illuminate when Sides A or B are engaged.
Secondary (Alt) Controls
Access alternate tone and time shaping controls by pressing and holding the FDBK knob while turning other controls:
- FDBK (PRESS) ALT: Press and hold the FDBK knob while manipulating other knobs to access secondary controls.
- HIGH PASS FILTER (HPF): Sets the cutoff frequency for a single-order high pass filter in the feedback loop, ranging from 0Hz to 300Hz.
- SATURATE: Acts as tape compression and saturation, mimicking the grit and feel of vintage tape delay units. Additional low pass filtering is introduced as saturation increases.
- TONE: Controls the tone of the delayed signal, with a cutoff frequency range from 1000Hz to 8750Hz.
- RHYTHM: Sets the subdivision of delay. Options include Quarter Note, Dotted Eighth, Andy Timmons Halo, Bucket Brigade (BBD), and Tape Delay.
Footswitch Controls
Smart controls at the press of a button:
- SIDE A / B: Tap the A or B footswitch to activate each side of the HALO. Tap the alternate footswitch to use the alternate sound stored in each Preset Bank. Only one side of each Preset Bank can be active at a time.
- ADVANCING PRESET BANKS: Hold both Side A and B stomps for 1/3 of a second to advance through presets 1-4.
- SAVING NEW PRESETS: Tap the FDBK knob to enter Preset Mode (Preset Bank light blinks). Then hold stomp A or B for 1 second to save settings to the desired side of the HALO.
Advanced Control
REMOTE SWITCHING: The two preset bypass switches can be controlled remotely using a TRS cable connected to the remote jack. The tip controls the B switch, and the ring toggles the A switch. The unit defaults to momentary switches but can be set to latching mode by holding the A bypass switch while applying power.
EXTERNAL TAP: Plugging a mono cable into the expression jack allows the use of an external switch for tap tempo control. Holding this switch also activates maximum feedback for the active delay.
Tap Tempo Mode
Control the time of the HALO's delay using Tap Tempo. Activate by pressing and holding the active side's stomp switch for 1 second. The bypass LED will flash the current tempo. Tap mode exits automatically after 5 seconds of inactivity or by pressing and holding the bypass switch for 1 second.
Infinite Hold
Freeze the HALO's sound with intuitive Maximum Feedback. Achieve Maximum Feedback by pressing and holding the stomp switch for the inactive preset. The feedback level returns to its previous level once the switch is released.
Trails or True Bypass
Trails can be activated/deactivated by holding down both stomp switches while connecting the 9V DC barrel connector. When trails are active, the HALO features a 'spillover' effect, allowing the previous side's effect to carry over when switching between Side A and Side B within a Preset Bank. Trails are engaged by default.
All Wet / Dry Mode
Dry signal can be toggled on and off by holding down the Side A stomp switch and the FDBK knob while connecting the 9V DC barrel connector.
Changing and Saving Presets
The HALO features a total of 4 Preset Banks.
Advancing Presets on the Fly
Advance through Preset Banks by holding both stomp switches for 1/3 of a second, or by using the mini toggle switch.
To Toggle Back and Forth Between Presets
- Tap the FDBK knob to enter ‘Preset Mode'.
- Cursor left or right through Preset Banks 1-4 by tapping either the A or B Side stomp switch.
- Once the desired Preset Bank is selected, press both stomp switches again (or tap the FDBK knob) to change to the desired Preset Bank.
Saving Presets
- Once desired changes are made, tap the FDBK knob to enter ‘Preset Mode'.
- Use the A and B stomp switches to cursor both forward and backward through Preset Banks 1-4.
- Once the desired Preset Bank is selected, hold either the A or B stomp switch to save your settings.
Note: You can also use the mini toggle to advance through Preset Banks 1-4.
Expression Pedal Use and Factory Reset
Assign a Parameter to an Expression Pedal
- Hold FDBK knob for 1 second to enter Expression Mode.
- Set connected expression pedal to heel-down.
- Turn a HALO control knob to the desired heel-down setting.
- Set the expression pedal to toe-down.
- Turn the same control knob to the desired toe-down position.
- Hold FDBK knob for 1 second to save your settings.
Note: Multiple parameters can be controlled simultaneously, with options for partial ranges, reassigned ranges, or reversed heel/toe positions.
Unassign a Parameter from an Expression Pedal
- Hold FDBK knob for 1 second to enter Expression Mode.
- Set connected expression pedal to heel-down.
- Turn each knob a small amount to indicate that the control should not be expression-controlled. Do not touch controls still assigned to the expression pedal.
- Set the expression pedal to toe-down.
- Hold the FDBK knob for 1 second to unassign and save.
Note: Expression pedal settings can be saved to any of the 4 HALO preset locations.
Expression Pedal Input
A TRS (stereo) expression pedal is required. When inserted, it defaults to controlling the LEVEL control. Plugging a mono Tap Tempo box into the EXP. PEDAL jack allows control of Tap Tempo & Infinite Hold for the active Side only.
Clear All Expression Settings
Enter Expression Pedal Mode (hold FDBK for 1 second), then hold the SIDE A footswitch for 1 second to clear all settings. Exit Expression Pedal Mode by holding the FDBK knob for 1 second.
Factory Reset
- Unplug the 9V DC barrel connector from your HALO.
- Press and hold the FDBK knob and the SIDE A and SIDE B footswitches simultaneously.
- Plug the 9V DC barrel connector back into your HALO.
- Release the FDBK knob, SIDE A, and SIDE B Footswitches. All HALO lights will cycle to indicate completion.
Factory Preset HALO Settings
Getting started with the HALO - Andy Timmons Dual Echo. TIP: HOLD DOWN THE FDBK KNOB TO ADJUST THE ALT CONTROLS.
Preset Bank 1 - Side A: Andy's Halo
Preset Bank 1 - Side B: Dotted Eighth
Preset Bank 2 - Side A: Quarter
Preset Bank 2 - Side B: Slapback
Preset Bank 3 - Side A: Vintage Multi Tap
Preset Bank 3 - Side B: Halo Reverb
Preset Bank 4 - Side A: Rackman BBD
Preset Bank 4 - Side B: Long Quarter
Your HALO Settings
Write in your favorite settings for the HALO - Andy Timmons Dual Echo. TIP: HOLD DOWN THE FDBK KNOB TO ADJUST THE ALT CONTROLS.
HALO Quick Start Guide
Primary Controls
- TIME: Sets the length of the delay.
- LEVEL: Sets the level of the delay.
- FDBK: Sets the regeneration (number of repeats) of the delay.
- RATE: Sets the speed of modulation of the delay.
- DEPTH: Sets the amount of modulation of the delay.
- TOGGLE SWITCH: Push to the right to advance through the HALO's 4 Preset Banks.
- STOMP SWITCHES A and B: Turns on/off Sides A or B of the HALO.
Alt (Secondary) Controls
- FDBK ALT (PRESS): Press and hold while manipulating other knobs to access secondary controls.
- HPF: Sets the bass cut of the High Pass Filter.
- SATURATE: Sets tape-like saturation & compression.
- TONE: Controls the tone of the delayed signal.
- RHYTHM: Choose from Quarter, Dotted Eighth, Halo, Bucket Brigade (BBD), or Tape Delay.
Preset Banks
- SELECT PRESET BANK: Briefly hold both Stomp A and B (or push mini toggle to the right).
- SAVE TO PRESET BANK: After making control knob changes, tap the FDBK knob, then use Stomp A or B to cursor through preset banks. Once the desired bank is selected, press and hold either Stomp A or B to save settings.
Infinite Hold
When Side A or B is active, hold the opposite stomp switch. Feedback level returns to normal upon release.
Tap Tempo
Press and hold the active Side's footswitch for 1 second. Then tap the same footswitch 2-3 times to set the desired tempo.
Trails
Press and hold both Stomp A and B while plugging in a 9V DC barrel connector to the HALO. (Trails by default).
Technical Specifications
- True-Stereo Input and Output
- True Bypass or Buffered Trails (Trails mode by default)
- Default Preset 1 - Andy Timmons ‘HALO' Sound
- 9V Neg-Tip DC Supply - 160mA
- Input Impedance: 1MΩ / Output Impedance: 10KΩ
- Modulation Rate: 0.1Hz - 10Hz
- High Pass Filter: 0Hz - 300Hz
- Delay Tone: 1000Hz - 8750Hz
For more information and a large print version of this manual, please visit RKFX.COM.
