Animated Tricillator Northern Light Modular Model 2AT Full Technical Overview

video upload by Kent

"The Covid Kid is back with his 90th video, 30 minutes in length(!), and 3rd round of Covid. I seem to only find time to make videos when I have some downtime due to Covid. Please excuse my flagging voice.

00:10 start of Audio Demos
07:39 start of Technical Overview and Features
08:07 AS3340 & AS3345 chips
08:20 What the 2AT isn't: not e-series and not based upon Buchla designs
09:38 The 4 main sections of the module
09:53 Common Control (Master Pitch in and offset knob)
10:33 Mix Out section with optical clipping
11:22 LFO Swarm based upon their Electric Dompteur h-seriers 1/2 space module. Genius!
13:35 LFO Swarm waveforms
14:15 the weird LFO shapes
15:05 8 octave range with rotary switch
16:08 mixer per oscillator
16:28 3 varieties of sub-octaves
17:39 FM normalling and routing
18:16 0-10V properly biased modulation outs on banana jacks
18:50 scoping out the modulation outs
19:50 shorting bars
20:00 listening to the various forms of oscillator sync
23:30 FM showcase. How it sounds and how the routing works.
28:00 3 Operator FM with 223e arpeggiator
29:21 Adding clocked LFOs and VCA mixing
30:14 fini!

The 2AT is an incredibly feature rich module:
It tracks over 8 octaves
3 oscillators with four waveforms each. Each waveform has an individual mix level control via knob and banana jack
Rotary switch for selecting the octaves
3-stage sub oscillator
Selectable Waveforum Mod CV (0-10V) out
Scalable FM and CV control
Full PWM control
Attenuverters wisely employed where they make sense
FM inputs normalled to the outputs of anther oscillator and the routing can be changed on the back
Sync I/O via shorting bars
Each oscillator's waveform outputs are mixed internally and are present at the MIX OUT if no single out is used
Optical clipping stages are present at each OSC, and again at the Mix Out stage

Clocked or Free-Running Swarm LFO
The 8 frequencies (the 8 outputs) can be offset in phase or frequency, always based on the master frequency.
It can go down to 0 Hz and freeze the levels at their present state
Each output has its own attenuator

Data sheet for AS3340 & AS3345: https://www.alfarzpp.lv/eng/sc/AS3340..."