Tag: delay

Synthrotek AstroNoise – DIY Build

February 22, 2022
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Synthrotek AstroNoise - DIY Build

Inspired by 80’s chip tune drum machines, the Synthrotek AstroNoise contains 3 different vintage tones that can give your track something its been missing. Originally released as a DIY project for Knobcon, the AstroNoise came into the world of modular last year in all of its nostalgic glory.

Since we could not make it to Knobcon 2021, we were thankful that this kit made it into the wild. Let’s get on with the build!

The Build...

Upon cracking open the kit, the novice builder could be overwhelmed by the number of things going on. Multiple ICs, bags of LEDs and switches and pots that are not labeled. Synthrotek includes the BOM with their kit and it also available online if that is easier to access. This is essential in building this kit, as well as having a way to test resistors in case any of them got shuffled in the packing or shipping. First things first; start by separating everything (make sure to keep the LEDs in their bags until you get to that part of the build)

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Synthrotek DLY (Delay) – DIY Build

September 14, 2020
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Synthrotek DLY (Delay) - DIY Build

Synthrotek DLY Kit

Delay, echo, reverb and distortion are all common effects for synthesis and in the world of modular synthesis, they make all the difference in the world. Synthrotek have had a long history of effects modules in their lineup and the DLY module is one of their finest.

The DLY is a PT2399 based delay module that can be dialed in to fit the users preferred range of delay due to the independent rate control. 

Another rad feature of the module is that unlike the ECHO module by Synthrotek, the DLY has a true wet/dry mix knob, giving the module its unique character and allowing it to be chained within the effects loop. Since fall was upon us, we decided to take on a couple of the companies legendary effects modules for our latest builds.

The PT2399...

Before we jump into the build video and all that jazz, let’s revisit an old friend of ours.. the PT2399 IC. You might recall a previous build of the Waveform Magazine PT2399 Delay module, where a karaoke module was converted into a delay module.

The Synthrotek DLY utilizes the same chipset. Aforementioned in the Waveform build, the PT2399 is a CMOS echo/delay processor developed by Princeton Technology Corp. It includes an ADC (Analog to Digital converter), 44Kb of RAM to store the samples and a DAC (Digital to Analog converter).

This chip was created as a simple solution to add delay/reverb/echo to karaokes and set-up entertainment systems. What does this all mean? This means that the chip is a perfect candidate for a delay module and the gang at Synthrotek decided to base a module around it.

Onward with the build ...

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Waveform Magazine PT2399 Delay – DIY Build

April 19, 2020
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Waveform Magazine Project 1 - PT2399 Delay Module - DIY Build

When it was announced that there would be a magazine dedicated to modular synthesis, you can imagine the feedback from the modular community. Waveform Magazine was born in the summer of 2019 and upon its release it created a following.

To much of everyones surprise, not only was this a magazine that reviewed modules, manufacturers, artists, etc.. it also contained its very own DIY projects.

Project #1 was a upcycled karaoke reverb PCB that would be transformed into a eurorack delay. Otherwise known as the PT2399 Delay or Waveform Magazine Project #1, this little 5HP module inspired a whole new group of DIYers due to its new found glory of being published.

Waveform Magazine PT2399 Delay Module

PT23.. what?

At the heart of Waveform Magazine Project #1 is the PT2399 chip. The PT2399 is a CMOS echo/delay processor developed by Princeton Technology Corp.

This digital chip includes an ADC (Analog to Digital converter), 44Kb of RAM to store the samples and a DAC (Digital to Analog converter). This chip was created as a simple solution to add delay/reverb/echo to karaokes and set-up entertainment systems. Pretty rad eh?

The PT2399 is readily available and has a minimum delay of 30ms and a maximum of 340ms (that could be extended up to 1 second at the expense of sound quality) which makes it perfect for delay, echo and reverb effects.

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