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User Manual for Polybass-P + Shield
(version for any instrument)
V 2.2 April 2020

Why do we make such an effort?

Bass is fundamental

working as a sound engineer, playing in bands, studying the history of instrument making
and analog electronics, the feeling became stronger every year that bass is much more
important than it seems. it's unfair that the bass player is in the background, but it also fits
to his fundamental task of stability and coordination for all other musicians.
Harmonies are built from harmonics of the fundamental tone. on primitive instruments like
the fanfare its only possible to play those notes, and hearing the bass tone, we feel why
all other notes belong together and why the notes that are not directly in the scale create
an interesting tension...
more so, I feel that the vibrations resonate in our bodies and a concert or dance night is
not just a social and cultural event but also a therapy... short:
IF I COME HOME FROM A SHOW AND DID NOT FEEL SOME LOW BASS, I AM NOT SATISIFIED !!

How to create the bass in a small ensemble

unfortunately not in every combo there is space for a bass player. there are probably more
duos and trios of voice, guitar and percussion or harmonica and clarinet and so on where
one of those instruments takes the musical task of the bass player, yet on an instrument
which does not have the size to create a real low bass.
BUT:
we are lucky that engineers of the last decades created portable woofers that fill a big
room with solid and profound bass! so one of the band can play a bass pedal and its done.
how clumsy and synthetic! we have a better solution: we divide the lowest notes of the
guitar so that they turn into bass notes! the guitar plays as usual, maybe a bit more aware
of its function, and the bass comes out for free, low and alive, discrete and present, but
not calling attention or pretending to be another instrument: everyone can see who plays
those notes, no one cares why they sound so low, but they feel satisfied

The physics of intervals

since the scales are made of harmonics which are multiples of the bass note, the higher
climb in the scale, the more notes we get, the closer the intervals are. and also: the high-
er the frequency, the shorter the wave, the quicker we identify notes. so an interval that
sounds good on the guitar can sound wobbly one octave lower!

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Summary of Contents for paradis Polybass

  • Page 1: Why Do We Make Such An Effort

    User Manual for Polybass-P + Shield (version for any instrument) V 2.2 April 2020 Why do we make such an effort? Bass is fundamental working as a sound engineer, playing in bands, studying the history of instrument making and analog electronics, the feeling became stronger every year that bass is much more important than it seems.
  • Page 2: What Is Different About Polybass

    The complete high class preamp system Polybass is not only the low bass but a complete 7-channel low noise low power preamp and mixing system, designed to give you the maximum possible options for configuring and mixing any kind of pickups in any guitar.
  • Page 3: About This Manual

    About this manual Polybass adds a low octave to each string separately, thats why it works so accurately. Godin/RMC produced many instruments with the necessary hexaphonic pick-up, thats why we made the board fit perfectly into guitars with the RMC Polydrive system. if you own such...
  • Page 4: Table Of Contents

    Resonances in your instrument Volume control for the split PBass Into which instruments can we install? VCA and GK control Acoustic guitars CV control off the Polybass effect Les Paul family three volume steps for PBass Strat family Roland GK control...
  • Page 5: Quick Installation Polybass Without Shield

    Quick installation Polybass without Shield the most simple way to use Polybass is by connecting the hex pickup at the input and the 1/4 jack at the output and a battery. this can all be done on one header connector:...
  • Page 6: External Controls Wiring

    External controls wiring in case you install the Polybass with the Shield, this page is not correct since the controls are connected to the Shield. but the kind of wiring is the same: insert the wires you need into the conector housing and solder them to the potentiometer.
  • Page 7: Quick Installation Polybass + Shield

    Quick installation Polybass + Shield the Shield makes installation easier and brings new features like: • tone control: Bass / Mid / Treb • another Aux input with a feedback reducing notch filter for a microphone or body piezo •...
  • Page 8: Control Connection

    Control connection depending on the kind of controls you use, they can be connected with one or two 6 or 12 pin ribbon cables or with crimped wires. one connector is for 2-3 volume controls, the other for 2-3 tone controls. for acoustic guitars, the thumb wheel potentiometers in the sound hole are interesting be- cause there is no need to drill into the guitar in this case we had no Aux and no Mid so two small connectors were sufficient:...
  • Page 9: Understanding And Adjustments

    Li have higher capacity. since a Li cell is about 3,6V, two cells produce 7,2V which is still enough for the Polybass. we are also trying to convince the industry to produce 9V batteries with 3 Li cells. the resulting 11V would make most pedals work better...
  • Page 10: Adjustable Volume For Each String

    D4 string Bass volume by default, the Polybass effect on the D4 string is similar to the E6 and A5 string. but some musicians like to have no effect on the D4 string and others prefer it to be lower so there is a transition between the strings with effect and the ones without.
  • Page 11: Roland Guitarsynth And Compatible

    G...A. those irregularities are better audible with the Polybass, but not related to it. so sorry, we cannot fix this, but you can improve a lot by holding the neck (or sometimes the bridge) firmly when you play that note.
  • Page 12: Into Which Instruments Can We Install

    Polybass! you will love the new possibilities: the piezo sound on electric guitar brings clarity and an aspect of acoustic. the Polybass with Piezo pickups offers a much better hidden GK option than the original Roland kit. if you do not like the 13pin DIN (which really has issues) consider using a better conector in the guitar.
  • Page 13: Archtop

    - which can be the Paradis plexi we made for the RMC version, we sell it separately. if you do not want to drill into the...
  • Page 14: Paradis Eden

    Paradis Eden this guitar has been built for FireWire, so the space is too big for the Polybass. but it serves as an example of a Shield built especially for the Paradis Pickup and the existing space. we can do the same for your guitar, or rather for your guitar model since you probably would find the development to expensive for a single instrument.
  • Page 15: What Can We Continue To Use

    Polybass board to its input What pick-ups can be used? all the Polybass asks for is that the strings are picked up separately. we tested it with the following piezo pickups: • Paradis pickup need a special bridge that lets you adjust pitch and hight •...
  • Page 16: How To Mount The Controls In The Instrument

    • 1/4” standard guitar connector: ordinary output of the preamplified mix. for many, this is enough and its easy to install and solder or connect to the Polybass or the Shield • 13pin DIN (Roland compatible): allows to output the strings separately plus a mixed...
  • Page 17: Polybass Shield Board Connectors

    1/4” jack and the battery note that the battery - is not equal ground (GND)! GND is a mid voltage generated on the Polybass board. the power switch needs to short the BatSwitch signal with GND. 1 Mix...
  • Page 18: Tone Control Connector

    3 pins are populated Rolf Spuler did not think that it makes sense to switch off this circuit, so this switch is neither in the wooDi box nor in the Paradis guitars which all had this circuit on a removable module...
  • Page 19: Polybass Board Connectors

    Input connections originally was the 14pin 0.1” header input connector. we expanded it to serve as a general connector between Shield and Polybass. we can pop- ulate it with as many pins as needed. you can either connect a flat cable or an input board or solder single wires.
  • Page 20: Output Connector

    Graphtec Ghost pickup connection (obviously nicer with a Polybass Shield board) Output connector is the 14/16pin 0.1” header that carries all the outputs: pin 1-6 strings E1...E6 pin 7 mix out pin 8 0-5V DC input for VCA or GK Volume...
  • Page 21: Insert Connector For Woodi-M Etc

    5mm distance from the main board and is another 3mm high itself. . if you use the Polybass Shield, this module can also be inserted there. (some say that 2 wooDi sound better than one, but the difference is small...)
  • Page 22: Mixing Options

    Mixing Options we offer several options to connect and control the elements. this may give you some work to understand and choose, but to select a product only because of such a preference or to modify later may cause even more work or less satisfaction. a main question is whether you want a Master Volume or parallel mixing: Parallel (no Master): wooDi...
  • Page 23: Outputpcb Board

    • 1 13pin DIN GK connector with gold contacts and metal fixing for two M3 screws • 1 two color LED - green is always lit (softly to save battery) red blinks when Bat low • 1 16pin header that matches Polybass X2 • 1 8pin header to configure the outputs (explained in picture below) •...
  • Page 24: Split Polybass Effect Out

    Split Polybass effect out sometimes its interesting to amplify the Polybass effect signal (we call it simply PBass in this manual) separately from the normal guitar signal because: • some guitar effects suffer when the PBass is mixed in. • guitar amps are not necessarily able to transmit the low PBass frequency and may dis- tort or not sound as full as the PBass can.
  • Page 25: How To Switch Back To Mono

    • solve it with the volume control as described as last solution in the Remove the PBass...? paragraph Implementation of the Split PBass out if you do not use our Polybass Output board or the Shield, the PBass signal is available on X2: pin16=ring=Pbass out, pin7=tip, pin9=Gnd. or X15: pin4 if you want to also mix the Pbass to the Main out, better use X15 so you can return on pin3.
  • Page 26: Volume Control For The Split Pbass

    Roland uses such a CV for the GK volume control. so to make the Polybass compatible with the RMC system and the Synth world, the PBass effect volume we built in a VCA which can be controlled by such a CV...
  • Page 27: Piezo Input Gain

    Piezo input gain the gain of the input stage has been adjusted for the Paradis and RMC piezo pickups (which produce the same output) to produce about the same output level as the 13pin DIN of the RMC Polydrive. to make sure that the input has enough headroom even for strong attacks, we added a capacitive input divider.
  • Page 28: Dimensions

    Dimensions we can also give you .dxf files, just ask for what you need Polybass board (Shield is the same) • Mounting height top: 5mm board: 1,5mm between boards: 7 or 10mm (depending on whether we use extra short pins for X1 or...
  • Page 29: Potentiometer Tt P09X

    Potentiometer TT P09X many versions are available with different shaft types and length. we only work with: flattened: T= 7mm knurled: L = 15 Potentiometer TT P160 so far we ony have solid shaft with L=15mm (needs a screw in the knob)
  • Page 30: Thumb Wheel Control

    Thumb wheel control Slider Alpha RA3044F we use Travel lentgh 30mm: 10k lin 10k log 10lin with center click...
  • Page 31 Paradis Rubin Piezo Pickup Paradis Avalon Piezo Pickup...

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