NLC - Is Carp Lust Wrong? - Build notes

These are my build notes for the nonlinear circuits "Is Carp Lust Wrong?" module.

It's a eurorack module. 

What exactly is it? 

It's a module loosely based on the Karplus Strong algorithm.

Karplus Strong is a pretty obscure synthesis method developed in the 1980s and used in physical modelling mainly of plucked strings

It was named after its principal inventors, Kevin Karplus and Alex Strong.

Think about how a acoustic string instrument works. 

When you first pluck the string it vibrates like mad. It has waveforms which are rich 

in harmonics. These initial waveforms are determined by  the mass and tension of the string. 

After being plucked, the string looses energy over time and becomes less complex, resulting in a "purer" tone with fewer harmonics. Eventually, the vibration stops, when all the energy is gone.

Basically the module works by exciting the delay with a burst of noise and running the feedback up...& changing the delay time to change the pitch and tone.

Links

+ Wiki

+ BOM..

Some of the parts aren't super common so I'll probably need to do a order from mouser 

(or your fav supplier) I think.

LM78L05 - +5V voltage regulator

LM13700M... yes

555 timer .... its a NE555 (yes)

BC857 x5 , BC847 x4

S1JL rectifier (the dot is the cathode)

                                                                                                                                Diodes = LL4148

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Waiting for parts....

V3207 or V3205 BBD chip ... order  ... you only need one of these !!!!

The V3207 is a cool audio replacement for the 1024-stage BBD analog delay Panasonic MN 3207 chip.

I ended up buying a DIP 8  coolaudio V3205 chip on ebay.

5v1 zener...on order ... tayda

I ended up using a 5V6 zener

J309 FET 

CD 40106

..

.

Aussie Wigglers Shoegaze Challenge - Ed vs Jono

The result of nights jam using a Alesis A6 and and a Zool multistomp pedal..

Edward Kuschel · Aussie Wigglers Shoegaze Challenge Ed vs. Jono

so lush ... i could have been fooled into thinking I have a CS 80

ELK Elektroniks - KOLOR Module - update

 Some updates for the new LED KOLOR module.

This is a eurorack module designed to control LED strips, squares, etc.

View this post on Instagram

A post shared by Music Tech, Synth, Keyboard Repairs (@elk_elektronik)

....

The module will be released as a kickstarter project.

More info can be found at Ed's official website

https://www.elkelektronik.com.au/kolor

Londinium profile

Londinium is a brand of coffee machine that hail from the UK.

They primarily focus on lever machines.

These machines have become famous for their unique style of shots

to the point that many baristas have tried to emulate the 

"Londinium shot" on other machines.

My moddified Gaggia Classic has a "Londinium Profile".

The Decent also has something similar.

So what is it?

It's a spring lever machine that uses pressurised pre-infusion at the beginning..

The technique it uses is something like a GS3 puck slam.

It really slams the puck with something like 25mls of water.

This very fast and early saturation of the puck compresses it much faster than is usual leading to a denser & thicker starting pour.

It's sometimes called a "water hammer".

The adapted "Londinium profile" for a standard lever machine involves

quickly hitting the puck with pressure (about 3-4 bar) and holding it there.

3 Bar appears to be the perfect pressure to balance capillary preinfusion with pressure preinfusion.

(3 Bar is also common in "Blooming profiles").

This gets the water through the puck evenly & quickly will minimal channeling.

The initial flow rate will be really low ... about 8ml/s (0.3 to 0.5g/s) range.

This will give you a beautiful thick top to your espresso.

After this, ramp up to 9 bar, then gradually drop back to zero

as the puck degrades.

Try to keep the flow rate constant during this second stage.

This second stage has much less body.

When you drink a shot like this it feels super creamy due to the thick top of the preinfusion.

In summary:

1. Pre-infuse:  8 ml/s, low pressure & hold at 3 bar.

                   (About 13 secs)

2. Post infusion: raise pressure and hold at 9 bar.

3. Final stage: decline to 3 bar.

You need to monitor the flow in these last stages.

Your aim is to keep the flow at about 2g/sec (2ml/sec).

This profile works really well on dark to medium roasts.

Usually, I aim for a 1:2 ratio

One important think to note is that although I use the measurement of pressure alot, what is also important is flow.

Pressure = flow x resistance

This type of shot is really tasty with milk based coffee like Latte

Rao Allonge / Sprover profile - coffee shots

 Scott Rao's Allonge shot or a Coffee Shot

Sometimes called the Sprover = espresso + pour over

Very controversial because it's super long.

It's kind of like an Americano or a Australian long black, but the difference

is that you don't just add water to an espresso.

Basically you are trying to make filter style coffee using an espresso machine.

Initallly it started with using a standard espresso machine (with 9 bars) and

a coarse grind.

The method was to pass water through the puck at 9 bars for 30 secs ... aiming to get

a ratio of 1: 10 etc 

According to Decent/John Buckman,

a 1:5 ratio (can do 1:4-7 or so) is good.

But with a sprover  1:11 or 1:13 is common

It's hard to do this on many "standard espresso machines" as they don't usually hold enough water

Remember to use a coarser grind than usual.... like on a Aeropress or V60

and Pull for around 30-60 seconds

Matt Perger recommended using the EK-47 grinder

https://hex.coffee/blogs/journal/why-we-coffee-shot-how-we-coffee-shot

These really long shots give amazing clarity ... esp for lighter roasts.

Ideally try to get a low flow rate -- maybe 3ml/sec

or 4.5ml/second flow rate the whole way

- peak at 8-9 bar, and ideally finish around 6ish on a lever. 

Pressure shouldn't go below 4bar on a lever , but with a e61, it can finish at 1-1.5 bar

... just experiment

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

Not all coffee machines can do this type of shot.

You need a machine with a large reservoir , and the ability to control flow rate.

If you have a entry level single boiler, you will probably not have enough water.

Machine that can do these types of shots:

Most flow profile e61 machines

Breville dual boiler

Nomad manual lever

Decent

MUN - build notes 2

 This is part 2 of my build notes for the nonlinear circuits Mun module.

The eurorack 22HP module is a 10 channel vocoder based on the Syntovox 222

The word Vocoder is a combination of two words.

Voice + Code = Vocoder

Vocoded signals were essentially a form of data compression for voice.

Links

+ Wiki

+ BOM

+ A bit about vocoders

Part 1 is here:

https://djjondent.blogspot.com/2024/02/mun-build-notes-nlc-vocoder.html

on order:

150nF = 0.15uF

To be continued....

Audacity 3.6 Out Now! New Effects & New Master Channel!