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WIGGLING 'LITE' IN GUEST MODE

[Order] 'Trans Europa' - transposer/CV processor/generator
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page 1, 2, 3, 4  Next [all]
Author [Order] 'Trans Europa' - transposer/CV processor/generator
frequencycentral
Trans Europa is a CV processor/generator module powered by Electric Druid code exclusive to Frequency Central, with a number of unique features:

• Octave switching over 9 octaves
• Voltage controlled octave switching, CV input is bipolar +/-5V
• Semitone transposition over 1 octave
• Voltage controlled semitone transposition, CV input is bipolar +/-5V
• 8 Modes (see below)
• Glide feature, which can be applied either manually or by external gate.
• CV thru, you can patch a 1V/oct voltage source in Trans Europa’s Input, it will be replicated at the Output, with the benefit that all Trans Europa’s features can be applied.



Although both CV inputs are bipolar +/-5V, they will also operate well from 0V to 5V CV sources, courtesy of the cunning way in which the input data is interpreted by Trans Europa. CV inputs are not 1V/oct, as Trans Europa was designed as a transposer rather than a quantiser (see ‘Backstory’). For example, in Mode 1 (Semitones), 0V to +5V CV input will allow transpositions over 13 semitones, -5V to +5V will allow transpositions over 25 semitones, in both cases 0V corresponds to no transposition.

8 Modes are available:
• Semitones
• Minor 7th
• Major 7th
• Rick’s Chord
• First Fourth Fifth
• Diminished
• Sustained A
• Sustained B

By applying control voltages to the Transpose CV input, arpeggios and tuned pseudo-random sequences can be achieved based upon the Mode selected, further enhancements can then be made by modulating the Octave CV input. Suitable input devices are wheels, joysticks, touch pads, FSRs, ribbons, LFOs, ADSRs, S/H etc.



Trans Europa can be used in a number of different ways:
1. As a simple CV source for quick on-the-fly octave and semitone transposition, using the Octave and Transpose knobs only.
2. As a complex CV source for octave and semitone transposition by applying CVs to the Octave and Transpose CV inputs, in this way many interesting pseudo sequences and arpeggios can be created.
3. In conjunction with 1V/oct source, using Trans Europa to transpose the octave and semitone of the 1V/oct source. Additionally, the 1V/oct source can be used to transpose pseudo sequences and arpeggios set up in point #2 (above).


Backstory
The original idea for Trans Europa was to provide a simple octave switch for VCOs which lacked this feature. We then decided that it would also be nice to include semitone switching too. It soon became apparent that working with PIC rather than in the analogue domain would provide for both features plus a lot more. PIC gave us the ability to include CV control of both octaves and semitones. It also presented the opportunity to include additional transposition modes, which added arpeggiation-like abilities to the feature set.

We added 1V/oct CV ‘thru’ so you can send a 1V/oct source such as a keyboard through Trans Europa and have the ability to transpose it both manually and under CV modulation. Finally, as Trans Europa developed into a CV processor, we decided to add gated glide to round out it’s feature set.

Early on in development, we decided that Trans Europa was to be a dedicated transposer, rather than a quantiser, by making this decision we were able to make the Transpose CV input far more manageable and useable, specific pseudo sequences and arpeggios are far more easily dialled in.

Trans Europa PCB/PIC: £20 GBP
Trans Europa 10HP panel: £15 GBP

Order by PM, or contact me via my website.


Build doc: http://www.frequencycentral.co.uk/wp-content/uploads/2014/01/Trans-Eur opa-Rev2-Build-Doc.pdf
woodster
I'm pretty sure I'll be grabbing one of these in the next few weeks.
applause
What is your Chord on Mode 4 ?
frequencycentral
woodster wrote:
What is your Chord on Mode 4 ?


Rick's Chord, maybe a bit like Howard's Note?

Paradigm X
I played with a prototype (?) at the Manchester wiggle. its a ton of fun even without cv control, the possibilities are limitless when cv is considered.
diablojoy
oohh nice !
tekzon
I'm in for 4xpcb/pic.
no panel
shipping to france
thanks a lot
it's a great module
djthopa
I know tihs comes out of laziness but any chance we could have a mouser / farnell etc bom cart?

It would be greatly appreciatted!
Dubka
This is great!

I'm a little unclear as to what the glide is affecting….

Does it glide between the cv'd transpositions?

Or is it just a general portamento on the output?

Or both?! seriously, i just don't get it
frequencycentral
Glide is the last 'block' in the module, so it affects the output, as well as the CV thru.
tekzon
happily payed!
Dubka
Do you reckon I could fit this behind an 8hp panel?
frequencycentral
Dubka wrote:
Do you reckon I could fit this behind an 8hp panel?


Certainly you could. I've considered 8HP myself but find it a little tight ergonomically.
Dubka
If you're transposing up in major or minor 7ths, surely you can't go all the way upto 12?! That would be like 11 octaves!!

Also, what does sustain A and sustain B mean? Up in 4ths?

I need data Rick! thumbs up
frequencycentral
Here's the details, expressed in semitone transpositions from the root:

Chromatic:
-12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Minor 7th:
-24, -21, -17, -14, -12, -9, -5, -2,
0, 3, 7, 10, 12, 15, 19, 22, 24

Major 7th:
-24, -20, -17, -13, -12, -8, -5, -1,
0, 4, 7, 11, 12, 16, 19, 23, 24

Rick's Chord:
-24, -22, -19, -17, -12, -10, -7, -5,
0, 2, 5, 7, 12, 14, 17, 19, 24

First Fourth Fifth:
-24, -19, -17, -12, -7, -5,
0, 5, 7, 12, 17, 19, 24

Diminished:
-24, -21, -18, -15, -12, -9, -6, -3,
0, 3, 6, 9, 12, 15, 18, 21, 24

Sustained A:
-35, -30, -25, -20, -15, -10, -5,
0, 5, 10, 15, 20, 25, 30, 35

Sustained B:
-24, -23, -19, -18, -12, -11, -7, -6,
0, 1, 5, 6, 12, 13, 17, 18, 24

...0 being equal to 0V. Positive CV giving higher than root transpositions, negative CV giving lower than root transpositions.
Microscopial
so just thought id let you know that ive built this and have no idea how to patch it, but as with Ricks other modules I just plug and hope and damn I had a quick hour of FUN easy build, but one tip is to populate the board then do Ricks fixes if you dont have the resistors as stupid me got easily confused(only if your a newbie) yet again easy to build and have fun buy one or two youll love em applause
Dubka
frequencycentral wrote:

Minor 7th:
-24, -21, -17, -14, -12, -9, -5, -2,
0, 3, 7, 10, 12, 15, 19, 22, 24

Major 7th:
-24, -20, -17, -13, -12, -8, -5, -1,
0, 4, 7, 11, 12, 16, 19, 23, 24

Rick's Chord:
-24, -22, -19, -17, -12, -10, -7, -5,
0, 2, 5, 7, 12, 14, 17, 19, 24

First Fourth Fifth:
-24, -19, -17, -12, -7, -5,
0, 5, 7, 12, 17, 19, 24

Diminished:
-24, -21, -18, -15, -12, -9, -6, -3,
0, 3, 6, 9, 12, 15, 18, 21, 24

Sustained A:
-35, -30, -25, -20, -15, -10, -5,
0, 5, 10, 15, 20, 25, 30, 35

Sustained B:
-24, -23, -19, -18, -12, -11, -7, -6,
0, 1, 5, 6, 12, 13, 17, 18, 24


Ah, you see - that's not what I imagined at all… good to know thumbs up
LektroiD
deleted message (problem sorted)
Microscopial
rich care to share for others who may encounter same problem,
LektroiD
Microscopial wrote:
rich care to share for others who may encounter same problem,


Hey Ross,

Just a simple one, I had set the dials to zero before powering up. Once I applied power, the mode dial just needed a wiggle before testing.

There was another small issue which involved my new Fluke meter (or at least not noticing where the decimal point was) - I should read the manuals before jumping on the forum and posting redundant messages. d'oh!
ejr27233
2 quick questions....
Will it run on +-15v without modification and are the schematics available yet??
frequencycentral
ejr27233 wrote:
2 quick questions....
Will it run on +-15v without modification and are the schematics available yet??


Should work fine on +/-15V. The 78L05 and 79L05 might run a little hotter. The only issue I foresee is the Offset Adjust, you might need to tweak a few resistor values, possibly R19, R29, R30. Or it might be fine as is, there should be enough play in the Offset trimmer already.

Schematic: http://www.frequencycentral.co.uk/wp-content/uploads/2014/01/Trans-Eur opa-Schematic.pdf
ejr27233
Many thanks for that
ThecureForSin
frequencycentral wrote:
woodster wrote:
What is your Chord on Mode 4 ?


Rick's Chord, maybe a bit like Howard's Note?



I already know what cover band I want to start...

appliancide
This looks really nice. What is the spacing between pot centers?
frequencycentral
Pot spacing is 17.78mm.
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