User guide aura ® spectrum di
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fishman.com USER GUIDE AURA ® SPECTRUM DI 2 Welcome Thank you for making Fishman a part of your acoustic experience. We are proud to offer you the finest acoustic amplification products available; high-quality professional-grade tools to empower you to sound your very best. We are confident Aura Spectrum DI will both enhance and inspire your music making. 3 Quick Start Power – Install a fresh 9V battery (not included) or connect a Fishman power adaptor. Set the controls – Volume at minimum and all other controls as shown below. Plug in – Use standard ¼-inch and XLR shielded instrument cables. Tune up – Step on the tuner footswitch to tune with the output muted. Set trim – Play hard and adjust the input trim (on the right side) so the clip/batt LED flashes only occasionally. Select an Image – Raise the volume and audition Images with the select knob. Move the Image Bank slider to choose the set of Images that best match the instrument you’re playing. (see pages 6 thru 13) Blend to taste – Turn left for more pickup and right for more Image. Kill feedback – If feedback starts, change the position of the phase switch. For advanced feedback handling, check out the section detailing the automatic feedback filters on page 24.
4 What is Aura? Aura Acoustic Imaging Technology uses digital algorithms developed in Fishman’s audio laboratories to restore a studio-miked sound to an acoustic instrument. To achieve this, we record instruments using world- class microphones and techniques to capture an “Image” of the natural sound that your acoustic instrument emits when miked in a professional studio. This Image, when recorded direct or played through an amp, mixer or PA, blends with your instrument’s pickup to produce an incred- ibly accurate recreation of the original recording. Aura Acoustic Imaging processors sound best when used with Fishman undersaddle pickups and magnetic soundhole pickups. When we record each instrument, we use our Acoustic Matrix undersaddle pickup. So, when you play through an Aura processor, you’ll get the best results using our Acoustic Matrix pickup. We do not recommend soundboard-mounted pickups, bridge-plate pickups, multi-sensor pickups or microphones for Aura products since they include unnecessary resonances that can inter- fere with the Aura processing.
To get the most realistic tone from Aura Acoustic Imaging, you should always match your Images with the instrument type you’re playing. For example, choose dreadnought Images when plugging in a dreadnought body style guitar; choose mandolin Images if you’re playing a mandolin. Don’t hope to derive a mandolin sound from a dreadnought or try to turn your orchestra body style guitar into a 12-string. If you are not sure which body type your guitar falls into, we suggest you audition several Images from each bank and let your ears decide. See the following pages to help match your instrument with the best Aura Image. 5 Aura Custom Shop For the ultimate in Aura Imaging, be sure to check out the Aura Custom Shop at fishman.com. For a modest fee, you send us your instrument and we’ll create a set of Images using our best microphones, custom recorded for you.
The Aura Image Gallery software manages a vast library of Images created from an ever-expanding list of instruments, and provides tools to search and store sets of Images. Browse the Image Library to find your instrument, then drag and drop an Image into an Image Set for download into Aura Spectrum. Making Connections Playing live For the best sound reproduction when performing live, connect your Aura Spectrum to an acoustic instrument amp, a PA system, a powered moni- tor or other full-range system. The balanced XLR D.I. output eliminates an outboard D.I. and features an automatic ground lift when you use the 1/4” output, providing a high quality, noise free signal. Going direct For direct recording, there is no better solution than using Aura Spectrum’s balanced XLR D.I. or 1/4” output. In fact, an acoustic track recorded with just a pickup can be re-recorded using Aura to restore the miked sound.
6 About the Image Banks Dreadnought Use this bank of Images with all varieties of the classic deep-body dreadnought. Image # Top Wood Back and Sides Microphone Type 1 Spruce
Rosewood DPA
® 4011
2 Spruce
Mahogany Soundelux ® E47
3 Spruce
Rosewood Soundelux ® E47
4 Spruce
Rosewood Neumann
® KM84
5 Spruce
Rosewood Schoeps
® CMC64
6 Spruce
Rosewood Schoeps
® CMC64
7 Spruce
Rosewood Shure
® KSM141
8 Spruce
Rosewood Neumann
® M147
9 Spruce
Rosewood Neumann
® M147
10 Spruce
Rosewood Schoeps
® CMC64
11 Spruce
Mahogany AKG
® C414
12 Spruce
Rosewood Neumann
® U87
13 Spruce
Rosewood Neumann
® U87
14 Composite Composite DPA
® 4011
15 Spruce
Rosewood Neumann
® M147
16 Spruce
Mahogany Shure
® SM57
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 7 Jumbo Use these Images with large, deep-body instruments with slim waists and wide lower bouts (usually over 16”). Image # Top Wood Back and Sides Microphone Type 1 Cedar Rosewood Shure
® SM57
2 Spruce
Maple AKG
® C414
3 Spruce
Maple DPA
® 4011
4 Spruce
Maple Schoeps
® CMC64
5 Spruce
Maple Schoeps
® CMC64
6 Spruce
Rosewood DPA
® 4011
7 Spruce
Rosewood Neumann
® U87
8 Spruce
Rosewood Shure
® SM57
9 Cedar
Rosewood DPA
® 4011
10 Spruce
Maple Soundelux ® E47
11 Spruce
Rosewood Neumann
® U87
12 Spruce
Rosewood Neumann
® KM84
13 Spruce
Maple Shure
® SM57
14 Cedar
Rosewood Neumann
® U87
15 Spruce
Maple Neumann
® U87
16 Spruce
Koa Schoeps
® CMC64
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 8 About the Image Banks (continued) Concert Use the Concert Images with small-body, short-scale instruments with thin waists, like 0, 00 and L-00 styles; typically finger-picking guitars as well as parlor and travel instruments. Image # Top Wood Back and Sides Microphone Type 1 Spruce
Rosewood Schoeps
® CMC64
2 Spruce
Rosewood Schoeps
® CMC64
3 Spruce
Maple Neumann
® M147
4 Spruce
Rosewood Shure
® SM57
5 Mahogany
Mahogany DPA
® 4011
6 Spruce
Rosewood Neumann
® M147
7 Spruce
Koa Neumann
® U87
8 Spruce
Rosewood DPA
® 4011
9 Mahogany
Mahogany Neumann
® M147
10 Mahogany
Mahogany Soundelux ® E47
11 Mahogany
Mahogany DPA
® 4011
12 Spruce
Maple Schoeps
® CMC64
13 Spruce
Rosewood Neumann
® M147
14 Spruce
Rosewood Neumann
® M147
15 Spruce
Rosewood Schoeps
® CMC64
16 Spruce
Koa Schoeps
® CMC64
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 9 Orchestra For guitars larger than concert but smaller than dreadnought, the Orchestra Images work well with OM & 000 styles as well as auditorium and other narrow-waist mid-size, medium-depth instruments. Image # Top Wood Back and Sides Microphone Type 1 Spruce Rosewood Soundelux ® E47
2 Spruce
Rosewood Neumann
® M147
3 Spruce
Mahogany Schoeps
® CMC64
4 Spruce
Mahogany Neumann
® M147
5 Spruce
Mahogany Soundelux ® E47
6 Spruce
Rosewood Neumann
® KM84
7 Spruce
Mahogany Soundelux ® E47
8 Spruce
Rosewood Soundelux ® E47
9 Spruce
Mahogany DPA
® 4011
10 Spruce
Rosewood Soundelux ® E47
11 Spruce
Rosewood Shure
® Beta 58A ® 12
Rosewood Schoeps
® CMC64
13 Spruce
Mahogany Neumann
® M147
14 Spruce
Rosewood Neumann
® KM84
15 Spruce
Rosewood Schoeps
® CMC64
16 Spruce
Rosewood Schoeps
® CMC64
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 10 About the Image Banks (continued) Nylon Use with all medium-depth classical and thin-body acoustic-electric nylon-string guitars. Note: Use only an undersaddle pickup with the Nylon pedal. Image # Top Wood Back and Sides Microphone Type 1 Cedar
Rosewood Schoeps
® CMC64
2 Spruce
Cypress Soundelux ® E47
3 Spruce
Rosewood Soundelux ® E47
4 Cedar
Rosewood Neumann
® M147
5 Spruce
Rosewood DPA
® 4011
6 Spruce
Cypress AKG
® C1000S
7 Spruce
Rosewood Soundelux ® E47
8 Spruce
Mahogany Neumann
® M147
9 Cedar
Rosewood Soundelux ® E47
10 Spruce
Rosewood Neumann
® M147
11 Cedar
Rosewood AKG
® C414
12 Cedar
Rosewood DPA
® 4011
13 Cedar
Rosewood Shure
® KSM141
14 Spruce
Cypress DPA
® 4011
15 Cedar
Rosewood Neumann
® M147
16 Spruce
Cypress Neumann
® M147
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 11 12 String These are typically jumbo or dreadnought size instruments. The heavier bracing for 12 string guitars creates a unique sound and has its own Aura Image bank Image # Top Wood Back and Sides Microphone Type 1 Spruce
Rosewood Soundelux ® E47
2 Spruce
Maple AKG
® C414
3 Spruce
Rosewood Soundelux ® E47
4 Spruce
Rosewood Neumann
® KM84
5 Spruce
Rosewood Soundelux ® E47
6 Spruce
Rosewood DPA
® 4011
7 Spruce
Rosewood Shure
® KSM141
8 Spruce
Rosewood Neumann
® M147
9 Mahogany
Mahogany Schoeps
® CMC64
10 Spruce
Rosewood Schoeps
® CMC64
11 Spruce
Mahogany Shure
® SM57
12 Spruce
Mahogany Neumann
® U87
13 Spruce
Rosewood Neumann
® U87
14 Spruce
Maple Soundelux ® E47
15 Spruce
Rosewood Shure
® SM57
16 Spruce
Koa Schoeps
® CMC64
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 12 About the Image Banks (continued) Bluegrass This bank offers a sampling of fiddle, mandolin, and resophonic Images.
Image # Instrument Back and Sides Microphone Type 1 Fiddle Maple Neumann
® U87
2 Fiddle
Maple Soundelux ® E47
3 Fiddle
Maple RCA
® Ribbon
4 Fiddle
Maple Royer
® R-121
5 Fiddle
Maple Neumann
® KM54
6 Mandolin
Maple Neumann
® U87
7 Mandolin
Maple Neumann
® KM84
8 Mandolin
Maple Neumann
® U87
9 Mandolin
Maple Neumann
® M147
10 Mandolin
Maple DPA
® 4011
11 Resophonic Finland Birch Schoeps
® CMC64
12 Resophonic Finland Birch Shure
® SM57
13 Resophonic Finland Birch Neumann
® KM84
14 Resophonic Finland Birch Neumann
® U87
15 Resophonic Finland Birch Neumann
® M147
16 Resophonic Finland Birch Groove Tubes ® Velo8
® Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights.
13 User Images This bank ships with a diverse variety of guitars randomly selected from our Aura Image Gallery. You can overwrite any of the 16 locations with Images you download from the Aura Image Gallery software. See page 26 for more details on downloading Images. Image # Top Wood Back and Sides Microphone Type 1 Spruce
Rosewood Shure
® SM57
2 Spruce
Rosewood Schoeps
® CMC64
3 Composite Composite Soundelux ® E47
4 Spruce
Mahogany Neumann
® KM84
5 Spruce
Rosewood Soundelux ® E47
6 Spruce
Mahogany DPA
® 4011
7 Spruce
Rosewood Neumann
® U87
8 Spruce
Rosewood Soundelux ® E47
9 Spruce
Rosewood Schoeps
® CMC64
10 Spruce
Rosewood Neumann
® U87
11 Spruce
Rosewood Neumann
® M147
12 Spruce
Rosewood DPA
® 4011
13 Mahogany
Mahogany Neumann
® U87
14 Spruce
Rosewood Neumann
® M147
15 Spruce
Rosewood AKG
® C414
16 Spruce
Sapele Schoeps
® CMC64
Fishman Transducers, Inc. is not affiliated with any of the forementioned companies or their respective trademarks, registered trademarks, product models or copyrights. 14 Left Side Panel Output Use a standard ¼-inch instrument cable to connect the output to your amplifier, mixer or effects devices. You can also connect this output to an unbalanced input on a recording system. Connecting a guitar cable here will also lift the ground on the XLR D.I. output, preventing unwanted ground loops. FX Loop This tip/ring/sleeve connection allows you to insert external devices, such as the Fishman AFX Acoustic Effects, between Aura Spectrum’s blended signal and the main outputs. Any pedals you connect here will appear at the 1/4” and XLR D.I. outputs. The overall output level will still be affected by Aura Spectrum’s volume control. 9VDC Power may be supplied by either a 9V battery (battery compartment underneath the pedal) or the Fishman 910-R (for 110V).
15 Right Side Panel Trim Raise or lower the trim to optimize the input level for your pickup. Play hard and adjust trim so clip/batt flashes occasionally. Some pickup systems may not cause the light to flash at all and other onboard preamps may require you to turn their output down to achieve an optimum level.
Use the phase switch to improve bass response at low volume and sup- press feedback at high volume. Move the phase switch and leave it in the position most pleasing to your ear. USB After installing Aura Image Gallery software, connect your computer here. Input Plug in your guitar here with a standard ¼-inch instrument cable. If you have a passive undersaddle pickup (no battery onboard), always plug into the Aura Imaging Pedal first, even if you use a pedal tuner. Insert a plug into the input jack, and the Aura Imaging Pedal powers up. To conserve the battery, remove the plug from the input when not in use. 16 Top Side Panel XLR D.I. Output Connect a standard microphone cable here to feed recording equipment or a sound reinforcement mixing console. When the 1/4” output is also connected, this D.I. output’s ground is automatically lifted to prevent any unwanted ground loops.
17 18 Front Panel Controls Volume The volume control affects the overall output level coming from both the 1/4” and the XLR D.I outputs. For the cleanest signal, set the volume as high as possible without clipping the next device in the signal chain. If you hear distortion and the clip/batt light is not flashing, reduce the
19 Select The select knob allows you to choose among the 16 Images available for each of the eight different Image Banks. Move the select slider to choose a bank of Images that best match the style of instrument you’re playing, then select through the 16 Images to find the ones that sound best. Try all 16 within each bank and adjust the blend knob to obtain more or less character. Blend Position the blend knob straight-up at 12 o’clock and you’ll hear a 50/50 mix of Image and pickup. Turn the blend all the way right for just Image; all the way left for just pickup. Most performers blend in some pickup with the Image for clarity and definition.
• For live performance try backing off the Image by setting blend to about 10 or 11 o’clock or about 65% pickup. You won’t need too much Image blended in to achieve a great live sound. If feedback occurs, flip the phase switch. • For recording, try blending in more Image for a realistic acoustic sound. Set the blend to taste. Again, you’ll often get good results with a little bit of pickup blended in with the Image for clarity and definition. more
pickup more
Image 20 Front Panel Controls (cont’d) Pickup EQ: Low, Mid, High As a default, the low, mid, and high tone controls affect the sound of the pickup signal only, allowing you to further refine the sound of your instrument without excessive alterations to the chosen Image. A Global EQ mode may also be selected, applying the same EQ settings to both the pickup and Image path simultaneously. Compressor The compressor control adjusts several settings within a sophisticated automatic leveling circuit. As you turn this knob clockwise, your overall playing dynamics become increasingly lim- ited, making softer notes louder and con- trolling loud spikes in your playing. This can be helpful in performances where you desire a more even level to your playing. At its maximum setting, there may be some overall increase in the output level. more dynamics
less dynamics
21 Global vs. Pickup EQ When shipped from our factory, the low, mid, and high tone controls are set to affect the sound of the pickup signal only. This is referred to as Pickup EQ mode. However, a Global EQ mode may also be selected which applies the same EQ settings to both the pickup and Image signals simultaneously (or “globally”). When you power on Aura Spectrum, watch the tuner display for a “P” or a “G” indicating the currently selected mode. To select Global EQ mode: 1. Hold the tuner button while Powering on. 2. The display flashes a “P” indicating that the unit is currently in Pickup EQ mode. 3. Press the anti-feedback button once and the display now flashes a “G” indicating Global EQ mode is now selected. 4. Press the tuner button to select Global EQ and resume powering on to normal playing mode. To return to Pickup EQ mode: 1. Hold the tuner button while Powering on. 2. The display flashes a “G” indicating that the unit is currently in Global EQ mode. 3. Press the anti-feedback button once and the display now flashes a “P” indicating Pickup EQ mode is now selected. 4. Press tuner button to select Pickup EQ and resume powering on to normal playing mode. 22 Front Panel Controls (cont’d) Tuner Footswitch Step on the tuner footswitch to enable the digital chromatic tuner. You’ll know it’s active when the white Aura LED goes dark and the tuning fork in the center display is lit red. As a default, Aura Spectrum’s output is muted allowing you to tune silently. To tune, play a note lightly and watch the display. The note name will be indicated as a single letter and a small # sign will be lit whenever the dis- played note is raised one half step. The note being sharp, flat, or in-tune will be displayed using the five multi-colored LEDs in the tuner window and below the tuning note. When there is no audio input, or you’re not playing, a “–” will appear in the display. This digital chromatic tuner accommodates all standard and alternate tunings and is calibrated to A = 440.
23 Tuner Option When shipped from the factory, the audio output is muted when the tuner is engaged. Alternately, you have the option to use the tuner without muting your out- put. To choose this option, hold the footswitch down until the Aura LED flashes. Repeat to return to the factory state. Bypass mode Aura Spectrum allows you completely bypass the Image, EQ, and Com- pressor processing. To enter bypass mode, press both the anti-feed-
slowly with the tuner LED to indicate bypass mode is active. To exit bypass mode, press both foot switches again. With bypass active, all controls including the tuner are functional, however you will not hear any of the changes until you exit bypass. an ‘A#’ played in-tune a ‘B’ played slightly sharp an ‘E’ played very flat 24 Front Panel Controls (cont’d) Anti-Feedback Footswitch Use this search-and-destroy anti-feedback filter in addition to the phase switch to control feedback during a performance. Aura Spectrum’s automatic anti-feedback filter can apply up to three separate notch filters, which are essentially very precise tone controls that reduce only a small piece of the audio band. When activated, the filter determines where the offending resonances are and only reduces the frequencies on which they are centered. While the
control is very effective, it’s best if you spend some time while setting up before a performance and catch any issues before you begin to play. With some practice, you’ll find you can also use it to “fix” any resonant notes that may stand out in a particular venue. Using the automatic anti-feedback control: 1. Press and hold
footswitch for 2 seconds. The tuner display will flash a “
” to indicate it is searching for the first feedback. 2. Turn up your
, then either dampen the strings while tapping the body or play the troublesome note until the feedback begins. The filter will automatically identify and eliminate the feedback. The “ 1 ” in
the display will light solid as will the “ A-F ” indicator. 3. At this point, you may continue to turn up your
as in step 2 to catch up to two more problematic resonances. Each is indicated via a flashing “ 2 ” or “
3 ” during the search, turning to solid lit numerals when the resonance has been identified. 4. You may tap the anti-feedback footswitch at any time to cancel the search. The circuit will hold the offending frequenc(ies) in memory until you repeat the process again. You may also turn the filter on or off at any time by tapping the foot- switch. When enabled, the “ A-F ” lights to indicate the filters are active and the number of filters being applied will be briefly displayed.
25 About Phase and Anti-Feedback There are two features provided to help control acoustic feedback, the phase switch and the anti-feedback control. Feedback usually occurs in the lowest octaves of your instrument. The natural resonances which produce an instrument’s tone also react with amplified sound. The louder an instrument is amplified, the more it will interact. Feedback occurs when a note on the instrument resonates in sync with the amplified sound, reinforcing and building to a sustained howl.
The phase switch flips the polarity of your instrument signal from positive to negative, changing its relationship to the sound coming from the amplifier. One phase setting usually provides better resistance to feedback than the other and will vary depending on the instrument and playing environment. Another approach to determining optimal phase is the selection which sounds or feels most natural when playing. The phase switch also affects the signal polarity to the balanced XLR D.I. and 1/4 inch outputs, synchronizing the amplifier with other sound systems in use. In certain playing environments the phase switch may not have an audible impact. The
anti-feedback control is an automatic variable frequency notch fil- ter designed to subdue a resonant peak on the instrument which is prone to feedback. Check out page 24 for more exact details of its operation. 26 Downloading Images The Aura Image Gallery software manages a vast library of Images cre- ated from an ever-expanding list of instruments, and provides tools to search and store sets of Images. If you can’t find your exact instrument in the list, use the built-in Image Wizard to find the closest match. For example, if one of our hundreds of Images doesn’t match your instrument exactly, you can still find a great sounding Image by matching similar tone woods and body styles. Experi- ment with these tools, and use your ears to determine what sounds best for your playing or musical style. To access this library of additional instrument Images, install the Aura Image Gallery on your computer. Then, gently remove the USB cover from the right side of the unit and connect the included USB cable to the side of the preamp and your computer. Create a new Image Set and load your Images into Aura Spectrum Be sure to install the Aura Image Gallery software prior to connecting Aura Spectrum for the first time. USB mini jack OR
27 Battery Replacement The clip/batt indicator will light steadily when it is time to change the battery. Open the battery door underneath the pedal and install a fresh 9V alkaline or lithium battery. When the clip/batt LED comes on you have approximately one hour of remaining battery life.
28 Signal Flow The illustration below shows the audio signal as it flows through Aura Spectrum. Note: When Global EQ mode is selected, the tone controls also affect the Image signal as indicated by * (see pages 20 & 21). input phase
compressor compressor Image select blend
* low
“insert style” effects loop fx loop
output volume
tip = send ring = return XLR ground is lifted when 1/4” output is is connected mid
high trim
clip | batt 29 Specifications Input impedance: 10M Ohm Input trim gain range: -10dB to +2dB Nominal Output impedance: 3.5k Ohm Maximum Output level (onset of clipping): +3dBV Digital signal path: A/D, D/A conversion: 24-bit Signal processing: 32-bit Baseline noise: -97dBV (A-weighted) Dynamic range: 100dB (A-weighted) Power supply: 9V battery or 9VDC adapter Typical in-use current consumption: 25mA Typical 9V battery life: 20 hours using alkaline battery
40 hours using lithium battery) 9V adapter: Fishman 910-R (for 110V)
or suitable filtered and regulated,
200mA type, tip = negative Tone Controls: Low (bass) control: ±12dB @ 70Hz Midrange control: ±12dB @ 1kHz High (treble) control: ±12dB @ 6.5kHz Anti-Feedback Notch Filter (3 notches): 100Hz Default Frequency
50Hz to 750Hz Search Range 0.25 Octave bandwidth
13.5dB Attentuation Phase switch: Forward position = non-inverting All specifications subject to change without notice
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