Wednesday, 3 August 2016

NLC 1006 filter

This is based on the ARP 1006 filter.... from the ARP 2500.
The ARP1006 is called the Filtramp.... the NLC version doesn't have the Amp bit.
It's just a prototype - the panel is an extra Andrew had left over for the NLC Serious Filter.

The world doesn't have enough ladder filters. I really love this version and can't wait to compare it to a vintage 1006. The NLC 1006 contains a two input audio mixer & a voltage controlled 24db/oct low pass filter. The cutoff frequency may be varied with control voltages or by the front panel Fc control.

Guitar Fool have schematics and a BOM of the 1006.
http://www.guitarfool.com/ARP2500/1006.html


This is a scan of an old ARP-2500 manual of mine.

.



For more info:


More NLC words of wisdom

-----------------------------------------------------------------------------------
You can find more NLC builds here.
---------------------------------------------------------------------------------------

Sunday, 31 July 2016

Wiard - Malekko Envelator - quick start notes


The Envelator is a 10hp envelope generator (Function Generator).
This eurorack version was based around the Wiard 300 series of modules
developed by Grant Richter.

The version on the left is a vintage gargoyles. 
These date from around 2009/10.
I love these "Celtic" designs.
 
It offers simultaneous output of positive and negative envelopes as well as voltage control of attack and decay functions.
There are 3 types of envelopes: 
AR (attack release), AD (attack decay) &  CY (cycle).
AR mode, outputs an AR envelope, maintaining full level until GATE [in] goes “low”. 
AD mode, outputs an AD envelope, and begins decay immediately when
the attack stage is complete.  
Cycle mode, the end pulse is fed back to the envelope input, and will force the envelope to re-trigger.(triangle LFO). The SQR output functions as a square wave LFO

The GATE socket is where you plug your gate or trigger.
This input is a comparator 
The threshold is 2V so any waveform above this will work


The SQR socket is an output.
It puts out a square +10V pulse during the attack phase.
and 0V during the decay/release phase.

The END socket is an output.
It outputs a a pulse at the end of the decay phase.
 
 

This is the modern Malekko version. 
As with the vintage version, the attack & delay have two settings
They are operated with the push buttons on the modern version
and pull switches on the gargoyles version. 

Attack : has a normal & 10X setting.
Delay :When the switch is "in" the delay control does nothing.
It is only when in cycle mode that activating the delay control has an effect.
The effect is to introduce delay before the envelope re-triggers.

You have CV control of the delay time. "DEL CV" on the modern version.
"Ext" on the Gargoyles version.


Both modules have CV inputs for Attack Modulation (AMOD) & Decay Modulation (DMOD).

There are 3 envelope outputs:
-out : inverted copy of the envelope.
+out : two positive copies of the envelope.



------------------------------------------------------------------------------------------------------
Using the Envelator as a clock divider:

1. Clock signal into Gate socket
2. Use the SQR socket as the output of the divided clock.
    It puts out a square +10V pulse during the attack phase
    and 0V during the decay/release phase.
3. Use the Attack pot to set the clock division. 
4.  Works in AD and AR modes

--------------------------------------------------------------------------------
 Using the Envelator as a LFO:
 
You have both triangle & square waveform LFOs.
Put the module into Cycle mode.
Leave the decay control at max (fastest speed).
The end pulse is fed back to the envelope input, and will force the envelope to re-trigger. creating a triangle LFO.
The SQR output functions as a square wave LFO.
 
--------------------------------------
Using the Envelator to change gate length.
 
1. mode switch to AD.
2. end your gate to the Envelator's gate input. 
3. Leave the decay control at max (fastest speed).
4. The attack control determines the length of the gate.  
 
 -----------------------------
ADSR Patch
 
You will need two Envelators,  a mixer and a VCA.
1. Set 1st to AD mode, and 2nd to AR mode.
2. send the same gate to each envelator .
3. take outputs of each Envelator into the inputs of the mixer.
4. take the output of the mixer and input into a VCA 


The AD one acts as the attack and decay. The AR does the sustain and release.
The Wiard Xmix can be used as a mixer & as a VCA.
I find there is a little bit of audio bleed when I use the Xmix as a VCA.
I prefer to use a dedicated VCA for this task.
 
 --------------------
 

The -OUT is normalled to the AMOD input 
but you can  patch it to the DMOD.
 
This makes the DEcay curve bend up.
 

Friday, 29 July 2016

Foundation - Isaac Asimov's

Foundation is arguably the original sci fiction series.
The first stories were published in the 1940's during the height of WWII.
They take place over a 1000 year time period.
One of the main characters, Harry Seldon has invented / developed the concept of mathematical sociology
and psychohistory, where he predicts the demise of the human race and it's plunge into a 30,000 year dark age.

At this time, the Galactic empire sprawls. It covers the entire Milky Way.
Humans have even forgotten where Earth is.
To lessen it's suffering, he plans for the human race to create a foundation of scientists & engineers to preserve civilization and become the cornerstones of a new Galactic Empire.


Foundation is a cycle of five interrelated short stories, first published as a single book by Gnome Press in 1951, although the original trilogy of novels were published in "Astounding Magazine" between May 1942 & January 1950.

These stories were inspired by Edward Gibbon's " History of the Decline and Fall of the Roman Empire".


Foundation (1951) - first 4 short stories.
Foundation & Empire (1952)
Second Foundation (1953)

Isaac Asimov won the 1966 Hugo Award for "Best All-Time Series" for the "Foundation" Series.
This covered the original 3 books
This beat JRR Tolken for his "Lord of the Rings" and Robert A. Heinlein for "Future History" .


Asimov would write two further sequel novels and two prequels.
Asimov began adding new volumes in 1981.
The two sequels: Foundation's Edge (1982) and Foundation and Earth (1986)
The two prequels: Prelude to Foundation (1988) and Forward the Foundation (1993)

In chronological order, the books can be read like this


1. Prelude to Foundation


Publisher: Doubleday
Publication date: November 1988
Print (hardcover and paperback)
Pages    403
ISBN    0-385-23313-2












2. Forward the Foundation





Publisher : Doubleday
Publication date: April 1993
Print (hardback & paperback)
Pages    417
ISBN    0-385-24793-1
OCLC    29849055












3.  Foundation

Publisher: Gnome Press
Publication date 1951
Print (hardback & paperback)
Pages    255
ISBN    0-553-29335-4

It includes 5 parts:
1. The Psychohistorians was written for the 1951 book.
2. The Encyclopedists was originally published in the May, 1942 issue of Astounding Science-Fiction under the title of "Foundation". (This issue)
3. The Mayors" was originally published in the June 1942 issue of Astounding Science-Fiction as "Bridle and Saddle".
4. "The Traders" was originally published in the October 1944 issue of Astounding Science-Fiction as "The Wedge".
5. "The Merchant Princes" was first published in the August 1944 issue of Astounding Science-Fiction as "The Big and the Little"




4.  Foundation and Empire

 Publisher: Gnome Press
Publication date: 1952
Media type    Print (hardcover)
Pages    247











5. Second Foundation

 Publisher:Gnome Press
Publication date: 1953
Print (Hardcover)
Pages    210














6. Foundation's Edge

Published: 1982 (Doubleday)
Print (Hardcover, Paperback)
Pages    367
Awards    Locus Award for Best Science Fiction Novel (1983)
ISBN    0-385-17725-9
OCLC    8473906











7. Foundation and Earth
    Publisher: Doubleday
    Publication date: 1986
    Media type    Print (Hardcover, Paperback)
    Pages    356
    ISBN    0-385-23312-4
    OCLC    13123192









    --------------------------------

    As was mentioned earlier, though it was first published as a single book by Gnome Press in 1951,
    the original trilogy of novels were published in "Astounding Magazine" between May 1942 & January 1950.

    The Foundation Magazine issues.
    You can download them from the Internet Archive.

    Foundation - first 4 short stories.

    Foundation Part II: The Encyclopedists
    May 1942, pages 38-53 (Foundation)

    Foundation Part III: The Mayors
    June 1942, pages 9-30 (Bridle and Saddle)

    Foundation Part V: The Merchant Princes
    August 1944, pages 7-54 (The Big and the Little)

    Foundation Part IV: The Traders
    October 1944, pages 64-79 (The Wedge)


    ** Note, Part I didn't appear in the magazine. It's first appearance was in the 1951 book. The opening section of Part II was not included in the book publication ***



    Foundation & Empire (3 magazine issues)

    Foundation and Empire Part I: The General
    April 1945, pages 6-61 (Dead Hand)










    Second Foundation (4 magazine issues)

    Second Foundation Part I: Search By the Mule
    January 1948, pages 7-61 (Now You See It...)








     Links
    + Wiki pedia
    + Hugo Awards Best sci fi novels of the 1960's

    --------------------------------------------

    sci Fi Index

    ----------------------------------------------

    Sunday, 24 July 2016

    Segue - NLC - VC panner/crossfader

    These are my build notes for the Nonlinearcircuits Segue.

    Its a very versatile unit. a VC panner, VC cross-fader, VCA and VC attenuator, process CV and audio.
    Plus should be a easy build.  Though there are plenty of SMDs, they are all passive.

    Andrew describes this as a "kind of hybrid between a Buchla 207 panner and a Korg PS3200 VCA".

    There are just two through hole 10R resistors to instal.
    Then, caps, trannies, headers.
    The trim pots are all 100k.They set the gain for each channel.

    I'm using Silonex NSL 32 vactrols. The white dot marks the cathode. (K on the PCB).

    NLC words of wisdom: (He'll never be) an old man river.
    Mmmmmmmm ????

    The reference to "Ol' Man River" isn't the song from the 1927 musical of showboat.
    Rather it's refering to TISM ... the Australia band.


     
     OK, its time for the pots & jacks.

     The LED works.... so does the VC fader. Very cool.

    "The LED provides offset to one side of the current mirror so they turn on/off at different voltages." Andrew F advised me to "drill the panel, or just drill/scrape off the soldermask on the back and the LED will make the panel glow".





    Useful links:
    1. Andrew's Blog
    2. Youtube 1 - Wear Headphones
    3. NLC build notes

    -----------------------------------------------------------------------------------
    You can find more NLC builds here.
    ---------------------------------------------------------------------------------------

    Saturday, 23 July 2016

    For Loops 2 - arduino

    For Loops 2
     
    Excerise: print numbers 1 to 10 & repeat.
     

     
     // variables

    int j; // counter
    int delayTime=100;

    void setup()
    {
      Serial.begin(9600);
    }

    void loop()
    {
      for (j=1;j<=10;j=j+1){
        Serial.println(j);
        delay(delayTime);
      }
      Serial.println(); // inserts a blank space ..first command after the loop.
    }
    ------------------------------------------------------------- 

    example 2
    count backwards from 10 , stopping at 1
    then looping back to 10

    // variables

    int j; // counter
    int delayTime=100;

    void setup()
    {
      Serial.begin(9600);
    }

    void loop()
    {
      for (j=10;j>=1;j=j-1){
        Serial.println(j);
        delay(delayTime);
      }
      Serial.println(); // inserts a blank space
    }

    ---------------------------------------------------------------------------
     ---------------------------------
    -------------------------------------

     
     Links
    Tutorial 16

    Thursday, 21 July 2016

    For Loops - Arduino

     The "for loop".
     
    This repeats a block of statements.

    Syntax

    for (initialization; condition; increment) {
      
    }
     eg
    for (int x = 0 ; x<100; x++) {
      
    } 
    The initialization only happens once.
    The condition is tested each time we loop. 
    If it's true,the increment is executed.
    Then the condition is tested again. 
    When the condition becomes false, the loop ends.
     
      -----------------------------------------------------------------------------------
    You will need a red and yellow LED.
    Don't use the blue or green.
    330 ohm resistors x2
     
    we are going to blink the yellow 3 times & the red 3 times.
     

    The anode of the LEDs connects to the resistors.

    Here is a very long winded way to write this code.
     
    ----------------------------------------------------------------------

    // variables
      int yellowPin=6;
      int redPin=9;
      int yellowTime=100;
      int redTime=100;



    void setup()
    {
      pinMode(yellowPin, OUTPUT);
      pinMode(redPin, OUTPUT);
      Serial.begin(9600);
    }

    void loop()
    {
      //we are going to blink the yellow 3 times
      digitalWrite(yellowPin, HIGH);
      delay(yellowTime);
       digitalWrite(yellowPin, LOW);
      delay(yellowTime);
     
      digitalWrite(yellowPin, HIGH);
      delay(yellowTime);
       digitalWrite(yellowPin, LOW);
      delay(yellowTime);
     
      digitalWrite(yellowPin, HIGH);
      delay(yellowTime);
       digitalWrite(yellowPin, LOW);
      delay(yellowTime);
     
      //we are going to blink the red LED 3 times
      digitalWrite(redPin, HIGH);
      delay(redTime);
      digitalWrite(redPin, LOW);
      delay(redTime);
     
      digitalWrite(redPin, HIGH);
      delay(redTime);
      digitalWrite(redPin, LOW);
      delay(redTime);
     
      digitalWrite(redPin, HIGH);
      delay(redTime);
      digitalWrite(redPin, LOW);
      delay(redTime);
    }
     ---------------------------------------------
     
    code 2 - the better way using loops
     

    we are going to blink the yellow 3 times & the red 5 times.
     
     
    --------------------------------
     // variables
      int yellowPin=6;
      int redPin=9;
      int yellowTime=100;
      int redTime=100;

      int yellowBlink=3; // these are for the for loop.
      int redBlink=5;
      int j;


    void setup()
    {
      pinMode(yellowPin, OUTPUT);
      pinMode(redPin, OUTPUT);
      Serial.begin(9600);
    }

    void loop()
    {
      for(j=1;j<=yellowBlink;j=j+1)
        //we are going to blink the yellow 3 times
      {
      digitalWrite(yellowPin, HIGH);
      delay(yellowTime);
       digitalWrite(yellowPin, LOW);
      delay(yellowTime);
      }
     for(j=1;j<=redBlink;j=j+1)
        //we are going to blink the red LED 5 times
      {
      digitalWrite(redPin, HIGH);
      delay(redTime);
      digitalWrite(redPin, LOW);
      delay(redTime);
      }
     
    }
     
    -------------------------------------
    Thanks to Paul McWhorter for his excellent tutorials.
    Much of the info is from tut 15.
     

     ---------------------------------
    -------------------------------------

    Wednesday, 20 July 2016

    Modular - eurorack - 303 patch

     This is an advanced patch for a modular acid baseline.
    303 style. It's from the VCF303 manual.
     
     There are many modules you can use, however these I have.
    Makenoise Rene, Brains+Pressure points  ADSR, VCA with two cv inputs, DinSync VCF 303

    ADSR: 2HP ADSR
    VCA: Doepfer A131
    Clock source & VCO: NLC Dual LFO/VCO

    The sequencer you use is really important.
    Apart from the usual CV and gate outputs for each step it should have outputs for
    accents, tied notes, and slide.

    René is extremely good at making acid thanks to the glide mode.
    The Pico Seq also does pitch slide between notes, constant or random.
    I think glides, slides and portamento are all the same  ??
     
    A tie however, is not the same as the slide.
    The difference is that a slide is a smooth change from one note to a different note, whereas a tie will hold the same note for two or more steps.

    Other sequencers that should be Ok are the Metropolis, DU-Seq, Stepper Acid, Verbos Voltage multistage.
    Nerdseq and flxs1 both have slew and ratcheting.

     The Winter Modular Eloquencer does have tied notes but can't as far as I can see do slides / portamento.

     
     
     
     

    To add slew, possible modules that may work include the makenoise Function/ maths, the doepfer 171 VC slew, the serge VCS, the NLC Helvetica Scenario.
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     ----------
    The patch
    1.Connect Rene QCV to your Oscillator's cv in 
    2. Set Rene to snake mode (X FUN page) 
    3. Set Rene glide on (X FUN PAGE) 
    4. Connect Pressure Points top row output to Rene XMOD 
    5. Connect Pressure Points second row output to VCF303 AC TRIG
    6. Optionally connect Pressure Points bottom row output to VCF303 CV 
        (if you want sequenced cutoff)
    7. Connect your VCO's square or saw output to VCF303 input 
    8. Connect VCF303 output to vca signal in 
    9. Multi your clock pulse. It connects to VCF303 ENV TRIG in, Rene XCLK, 
        Brains clock in and the ADSR gate in 
    10. Connect the ADSR output to vca cv in 1
    11. Connect VCF303 ACcent out to vca cv in 2 (
     
    Use the top row of Pressure Points to control sequencer glides 
    Use the middle row of Pressure Points to control accents 
    Use the bottom row of Pressure Points to control frequency cutoff (if connected)