(LIVE) AFG user manual

UPDATE STATUS: 2020 01 16

work continues 2010 01 16 1300 eastUS

(4pm) Eastern US

This post is the AFG user manual in progress. Updates will be made as each section is completed. Please recommend topics/items to be covered below in the comments.

(begin)

CONTROLS (knobs and switches):

COARSE FREQUENCY – pitch adjustment (wide range)

FINE FREQUENCY – pitch adjustment (narrow/fine) range

FM1 – incoming CV affects master pitch

LINEAR/EXPONENTIAL SWITCH (L) – selects response curve for FM1 input

FM2 – incoming CV affects master pitch

LINEAR/EXPONENTIAL SWITCH (R) – selects response curve for FM2 input

PWM – PULSE WAVE initial pulse width

PWM CV – pulse width modulation CV INPUT level

MATTER/ANTI MATTER SWITCH – selects “standard” or “folded” content via waveform outputs

+PPM/-PPM* – initial animated pulse position

+PWM/-PWM* – initial animated pulse width

+CV/-CV* – PULSE POSITION/PULSE WIDTH modulation CV INPUT level

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INPUTS (jacks):

FM2 FREQUENCY MODULATION CV INPUT

FM1 FREQUENCY MODULATION CV INPUT

PWM CV – FREQUENCY MODULATION CV INPUT

+PPM/-PPM* – PULSE POSITION MODULATION CV INPUT

+PWM/-PWM* – PULSE WIDTH MODULATION CV INPUT

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OUTPUTS (jacks):

PULSE OUT – PULSE WAVE

SQUARE OUT – SQUARE WAVE

SINE OUT – SINE WAVE

TRI OUT – TRIANGLE WAVE

SAW OUT – SAWTOOTH WAVE

SUB OUT – SUBOCTAVE WAVE (SQUARE OR SINE)

ANIMATED PULSES – ANIMATED PULSE WAVE

ALIEN SAWS – ANIMATED PULSE WAVE WITH A SLEWED RISE

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*applies to HARMONIC ANIMATION section only

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(editor note: I would consider everything up to this point sufficient to be considered a “quick start guide” for experience operators already familiar elementary concepts related to subtractive synthesis. Any feedback would be appreciated)

(next section)

AUDIO FREQUENCY GENERATOR (AFG)

THANK YOU for purchasing the LIVEWIRE SYNTHESIZERS AFG!

The AFG – designed by founder Mike Brown – is LIVEWIRE’s take on what a stock VOLTAGE CONTROLLED OSCILLATOR (VCO) should offer to a basic eurorack modular configuration.

OVERVIEW (applies to all versions):

The AFG is a SAWTOOTH CORE VCO that will create 18 different waveform types (8 simultaneous).

Additionally the AFG offers:

2 FM CV inputs with 2 response curves (LINEAR/EXPONENTIAL via switch)

2 1vOct inputs

1 PULSE WIDTH MODULATION (PWM) CV input

HARMONIC ANIMATION from dedicated waveshaper (produces ANIMATED PULSES and ALIEN SAWS waveforms) with independent CV control of the + and – slopes of the waveform cycle

1 PULSE WIDTH MODULATION (PWM) CV input

HARMONIC ANIMATION from dedicated waveshaper (produces ANIMATED PULSES and ALIEN SAWS waveforms) with independent CV control of the + and – slopes of the waveform cycle

NEW TO VERSION 2

Improved power management

(only requires a single power cable – ver1 required separate power for HARMONIC ANIMATION)

Improved tracking (8 octave range +/- 5 cents) with separate calibration for HIGH FREQEUNCY scaling

2 SYNC options

Shallower profile (will fit the depth of most eurorack enclosures)

(next section)

HARMONIC ANIMATION

The HARMONIC ANIMATION zone of the AFG begins by shaping the CORE into a PULSE WAVE and adding a second PULSE for each half of the waveforms cycle (a “DOUBLE PULSE”). In addition to setting the intial PULSE WIDTH and controlling the incoming CV for PULSE WIDTH MODULATION (PWM), there are identical controls and CV inputs for the position of each DOUBLE PULSE on the + and – slopes of the waveform.

A video demonstration of HARMONIC ANIMATION can be seen here:

OPERATION:

HARMONIC ANIMATION (NOT COMPLETE)

The controls of the HARMONIC ANIMATION zone are divided into 3 categories:

  • INITIAL waveform settings (knob)
  • CV INPUT levels (knob)
  • CV INPUT (jack)

MATTER /ANTI MATTER (NOT COMPLETE)

CALIBRATION (NOT COMPLETE)

DISCLAIMER: The following controls are set during final assembly at Monorocket. There are few instances where further adjustment is necessary and the following is provided for information purposes. Users accept all liability for any negative consequences that result from making adjustments to any controls on the rear of the unit.

SCALING

SETUP:

  • CONNECT a scaled voltage source to either of the 1v/Oct INPUTS
  • CONNECT audio from the SQUARE OUT jack to a tuner (or an audio channel mixed with a reference tone)
    step 1:

  • LOCATE the scaling adjustment trimpot on the back of the AFG.

    Version 1: VR101

Verison 2: VR101 (also labeled TRACK)

NOTE: Version 2 also has a trimpot labeled HF Track. Setting this trimpot will be addressed after the initial scaling instructions.

WARNING: ADJUSTING ANY OTHER TRIMPOT WILL RESULT AFFECT THE WAVEFORMS

step 1:
PLAY C4 and – using the COARSE FREQUENCY control – tune the AFG to C4

step 2:
PLAY C1 and – using the SCALING ADJUSTMENT – tune the AFG to C1

step 3:
PLAY C4 and – using the COARSE FREQUENCY control – tune the AFG to C4

step 4:
PLAY C1 and – using the SCALING ADJUSTMENT – tune the AFG to C1

REPEAT steps 1 – 4 until C4 and C1 are in tune without further adjustment

(Only Steps 1 – 4 are necessary for a Version1 AFG, the remaining instructions are for Version 2)

step 5:
PLAY C8 and – using the HF TRACK trimpot – tune the AFG to C8

step 6:
PLAY C4 and – using the COARSE FREQUENCY control – tune the AFG to 4

REPEAT steps 5 – 6 until C4 is in tune and C8 is within the acceptable range of +/- 5 cents

Flux Capacitor Update 9 Jan

Heres some audio examples of the Flux Capacitor controlling the ANTI MATTER SINE and ANTMATTER TRI of an original AFG (limited edition black PCB)

The ANTI MATTER feature in the AFG is an internal wavefolder. What makes this process different than using an external wavefolder module is: the folding is applied the sawtooth core before going to the individual waveshapers (vs. feeding a TRI or SIN into the module for folding).

The patch (pic above) used Malekko Heavy Industry Oscillator into the CV1 input for audio rate FM to the folding range. The 1vOct inputs of the AFG and the Malekko Oscillator were fed a repeating sequence.

The Pittsburgh Modular Timetable was used to subdivide an incoming trigger and fed to the Flux TRIG input. This hits the FLUX CAPACITORS on board AR (A is fixed value, R is adjustable via the FALL control).

EXAMPLE 1 and 2: INITIAL control manually sweeping the folders range. The high end “sizzle” heard at 00:16 is the FM oscillation from the Malekko Oscillator. The sweep of that FM Oscillation is the by product of mixing with the CV from the onboard AR (triggered from the subdivided output of the PGH mod Timetable):



EXAMPLE 3: Same as EX1 and EX2 with MORE AR:


EXAMPLE 4: Same as EX1, EX2 and EX3 with added VCA+EG after the AFG SIN/TRI output and 11+ minutes of knob tweaking.


EXAMPLE 5: Same patch with a Frequensteiner in HP between the AFG and VCA (cutoff adjusted manually):


AFG RTFM

User manual for the AFG coming soon

The current objective is a one page “quick start”.

If the user (you) would prefer something more “in depth”, please submit your desires in the comments.

A separate post will serve as a working draft (or a living manual) for your review.

(DISCLAIMER: Comments will be delayed pending moderation. The comment system is literally defenseless against the waves of cyrilic text that come in every day)