Radial Engineering VIENNA CHORUS User manual

True to the Music
VIENNA CHORUS™
Radial Engineering Ltd.
Part # R800 7120
Bones Vienna Chorus™
TM
Ch-A - subtle chorus effect with moderate speed.
Ch-B - more dramatic chorus with deeper modulation.
Ch-A - slow, thick & lush chorus.
Ch-B - fast shimmer effect.
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CONGRATULATIONS on your purchase of the Bones Vienna Chorus.The Vienna is a
highperformancedualchannelanalogchoruspedalthatemploysan‘oldschool’analog
bucket brigade processor to produce the warm and lush chorus effect of years gone by.
Thebigdifferenceisthat unlikethose noisyoldanalogchoruspedalsthatsoundcoolbut
are practically unusable, we have designed the Vienna so that it is quiet and hiss-free.
For maximum on-stage efficiency, the Vienna is equipped with two channels. These
let you toggle between two separate chorusing effects and bypass mode. Each chorus
channelfeaturesseparate RATE andDEPTHcontrols that letyoudial-indistinct chorus-
ingsettings. UsingtheMODE footswitch,youcan quicklytogglebetween thetwo chorus
channels to create effects such as a slow choral and fast Leslie. To add more spice,
the Vienna is also equipped with TURBO. When engaged, ‘turbo’changes the oscillator
shape and chorus intensity to let you create more radical effects.
The Vienna chorus… just as fun as having anAustrian Choir plugged into you amp!
POWERING THE VIENNA CHORUS
The Vienna requires the same type of power supply as used by Boss™, MXR™ and
other popular pedals. This is typically a wall-type external power adapter that produces
9 to 12 volts DC with a 2.1mm barrel jack wired center pin negative . Bones
pedals will draw a maximum of 100mA. Possible damage may occur if another type of
power adapter is used. Consult your dealer for the best option to suit your pedal-board
setup.
CONNECTIONS AND SETUP
Beforeyou begin,turnyour guitaramplifierOFF. Connect thepower supply adaptor.The
LEDs on the Vienna will illuminate when a footswitch is depressed indicating the pedal
is powered up and ready for use. Set the TURBO switch to normal.
To start, place the pedal in bypass mode by depressing the BYPASS footswitch (LEDs
off). Connect your guitar to the IN jack. Connect the OUT jack to your amplifier.
Alwaystest yourconnectionswithyouramp setat alowvolume level.Turnyourampon.
If no sound is heard, check the guitar and power connections. If all is OK, turn your amp
up to a comfortable playing level.
Activate the pedal by depressing the BYPASS footswitch (LED on). Select channel-A
with the MODE footswitch (LED on).Adjust the RATE and DEPTH controls as needed.
Depress the MODE footswitch again and set up channel-B (LED off). At any time you
can switch the pedal into TURBO mode.
The wonderful advantage you get when using the Vienna chorus is switching between
two distinct chorus effects. Here are some sug-
gestions for using the two chorus channels.
First, channel-A could be set with a slow RATE
and lots of DEPTH to produce a thick and lush
chorus. While channel-B could be set to the op-
posite, a fast RATE with just a little DEPTH to
produce a subtle shimmer effect.
AnotherapproachwouldusethesameRATEset-
ting on both channels but with different amounts
ofDEPTH.Thiswould allowyouto quicklytoggle
between a standard chorus effect and a more
dramaticchoruswith the footswitch.The TURBO
switch may be engaged to increase the range of
modulationbetweenchannelsandevenproduce
rotating speaker type effects.
Take your time, experiment and have fun.
FEATURES AND FUNCTIONS
1. IN: 1/4” input jack for your guitar.
2. OUT: 1/4” output jack connection to your amp.
3. PSU: Connection for 9-12 volt DC, center pin negative
( ).
4. BYPASS: Footswitch toggles between chorus effect
and bypass. An on/off LED status indicator illuminates
when the effect is active.
5. MODE: Footswitch selects between chorus channels.
An LED status indicator illuminates when channel-A is
active.
6. CHANNEL-A: RATE controls the speed of the
modulation. DEPTH controls the amount of modulation.
7. CHANNEL-B: A second set of RATE and DEPTH
controls for channel-B work the same and allow the
Vienna to produce two unique chorusing effects.
8. TURBO SWITCH: Switches between normal and
TURBO. TURBO dramatically intensifies the effect by
increasing the depth of modulation.
USER GUIDE

Radial Bones Vienna™Chorus User Guide v1.0-Nov. 2009 • Part #: R870 1229 00 • © 2009 All rights reserved • Subject to change without notice.
www.radialeng.com
Radial Engineering Ltd. • 1588 Kebet Way, Port Coquitlam, BC Canada V3C 5M5
Tel: [phone] • Fax: [phone] • email: [email protected]
RADIAL LIMITED THREE YEAR TRANSFERABLE WARRANTY
Radial Engineering Ltd. warrants this product to be free from defects in material and workmanship and will remedy any such
defectsfreeof charge according tothetermsofthis warranty.RadialEngineeringwillrepairorreplace at its optionanydefec-
tive component(s) of this product, excluding the finish, the footswitch (tubes and footswitches are warranted for 90 days) and
wearand tear fromnormal use, fora period ofthree (3) yearsfrom the originaldate of purchase.In the eventthat a particular
product is no longer available, Radial Engineering reserves the right to replace the product with a similar product of equal or
greater value. In the unlikely event that a defect is uncovered, please call 1-800-942-1001 or email [email protected]
to obtain an RAnumber (Return Authorization number) before the 3 year warranty period expires. Once you have obtained
anRAnumberyoumust return the product,freight prepaid, withinfifteen(15) days afterthedate the RAnumberis issued. To
makea request orclaimunderthislimitedwarranty,the product mustbereturnedprepaidintheoriginal shipping container(or
equivalent) to Radial Engineering or to an authorized repair centre and you must assume the risk of loss or damage.A copy
of the original invoice showing date of purchase and the dealer name must accompany any request for work to be performed
under this limited warranty. This limited warranty shall not apply if the product has been damaged due to abuse, misuse,
misapplication, accident or as a result of service or modification by any other than an authorized repair centre.
THEREARE NO EXPRESSEDWARRANTIESOTHERTHANTHOSE ON THEFACE HEREOFAND DESCRIBEDABOVE.
NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUTNOT LIMITED TO, ANYIMPLIED WARRAN-
TIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPEC-
TIVE WARRANTYPERIOD DESCRIBED ABOVE OF THREEYEARS. RADIAL ENGINEERING SHALL NOTBE RESPON-
SIBLE OR LIABLE FORANY SPECIAL, INCIDENTAL OR CONSEQUENTIALDAMAGES OR LOSS ARISING FROMTHE
USEOFTHIS PRODUCT.THIS WARRANTYGIVES YOU SPECIFIC LEGALRIGHTS,ANDYOU MAYALSOHAVE OTHER
RIGHTS, WHICH MAY VARY DEPENDING ON WHERE YOU LIVEAND WHERE THE PRODUCT WAS PURCHASED.
FREQUENTLY ASKED QUESTIONS
Can I use any 9 volt adapter to power the Bones?
Therearemany adapters thatcansupply9-12 volts DCbuttobe compatible theadaptermustalso have a2.1mmbarrelplug wired center pinnegative.The Bonesdraw
100mAof current tooperate.Youradaptercan be rated higher, forexample500mA,but not lower.
I hear a high frequency “whine”. What causes this and how do I get rid of it?
Mostlikelythisiscausedbythepoweradapteryouareusing.Some switchingtypepoweradapterscanmakenoisethatbleedsinto theguitarsignal.Ifyouencounterhigh
frequencynoisetry a differentadapter.Werecommend standardlinearadaptersalthough we havesuccessfullytestedthe Bones with bothtypes.
Is the Vienna a true bypass pedal?
No. Bones pedals feature active buffering in bypass mode that lowers the output impedance allowing longer cables without noise or tone loss. This also enables us to
employ EIS - Electronic Impulse Switching that eliminates certain problems with true bypass designs. True bypass switching can be noisy when switching pedals on and
offproducing pops andclicks.Ifused in conjunctionwithhigh-gainamps, that “pop” canbecomea loud “bang”.TheEIS switch is 100%noiseless.
Which is better, True Bypass or Buffered Bypass?
Buffers are a good thing to have in your signal chain. They regulate your signal and lower the output impedance to drive long cables and dirty (oxidized) jack contacts.
However,buffershavereceiveda bad reputationbecausesome manufacturersdesigntheir buffercircuits tosavemoney.Thatdesignstrategy limits overallsoundquality
ofthebypassed signal andhascreateda demand forabettersystem. Thesimplestalternative was todoawaywith the bufferandprovidea hard-wired bypass viaame-
chanicalswitch and theterm“true bypass”wasborn. Butthisarrangement hasadownside too. Mechanicalswitchescan makenoiseand are lessreliablethan electronic
switching.The Bonesaredesigned withagreat soundingclass-Abufferthatemulates theinputimpedance ofatypical tube amp.Witha welldesignedbuffer yougetless
noiseandgreat tone.
Why can’t the Vienna be powered by a battery?
It’sbecause of theclass-Atopology. Class-Acircuitssoundbest but are powerhungryand will drain abatteryinno time.
I use several pedals. Where’s the best place to put the Vienna in my signal chain?
There are no rules but there are general guidelines when it comes to modulation pedals like chorus. Placing distortion pedals like the Bones Hollywood before a chorus,
flanger or phaser will make their effects more prominent because of the increased harmonics the distortion adds. If you use time based effects like reverb or delay you
cantryplacingthe Vienna before themtoproduce“chorused” reverb and delay or after to“color”timebasedeffect with chorus. Eachmethodproducesaslightly different
outcome.Experimentand have fun.
DECLARATION
OF CONFORMITY
Radial Engineering Ltd. declares that
this product conforms to the following
specifications:
Safety: IEC 60065 (1998), EMC: EN
55013 (1990), EN 55020 (1991)
Supplementary information: The
product herewith complies with the
requirements of the Low Voltage Direc-
tive 72/23/EEC and the EMC Directive
89/336/EEC as amended by Directive
93/68/EEC.