Flowsonics Zipper is an unusual delay plugin that provides the zipper noise effect for sound design purposes.
As a fan of versatile delay pedals, I’m always thrilled to explore new delay plugins. The Flowsonics Zipper, however, took me by surprise. Instead of the usual melodic delay, it offers an unusual zipper noise effect for sound design purposes.
I did not need a zipper noise effect for my mixes as I am not into sound design that much, but I wanted to give it a try and found out it can actually come in handy for creating weird effects here and there.
Let’s start with the user interface. It is as simple as it can be. There are three sections: the Snap section comes with the Mode selector and Snap Speed. You have Top mode, which works with the top line of the mix, the Bottom line, which works with the bottom, and the Loop mode, which alternates between the two.
The Top mode has a 0 ms delay time, while the Bottom mode has a 100 ms delay time. And the Snap Speed for setting the speed of the effect.
Then, you have the Control section with a single Zipper parameter. The Zipper parameter acts as the speed of the delay. I recommend using it at higher levels as the effect gets easier to hear that way.
The last section is the Output section with the Recovery and Mix knobs. The Recovery control dictates how quickly the sound goes back to its original pitch, while the Mix knob decides the ratio of Wet and Dry signals.
The user interface is also resizable, which is a small detail, but I like to see that in plugins.
So, the plugin reaches the zipper effect by upsampling and filtering the changing delay time. This way, you can create controlled zipper noises to add some unique effects to parts of your mixes or, basically, for sound design purposes.
For musical purposes, I don’t see myself using this plugin very often. It is an odd delay pedal that only serves one purpose: the zipper effect. But, without a doubt, it is a handy tool for sound design and experimental musicians. The loop mode, for instance, can be used to create a bouncing, pitch-shifting effect for some electronic mixes to add a unique flavor to the song.
Flowsonics Zipper is available in VST2, VST3, and AU formats for Windows and macOS.
Check out the Flowsonics Zipper manual here.

Berk is a multi-instrumentalist musician from Istanbul, Turkey. He has been playing guitar, handpan, and percussion for over ten years, developing a sound that blends melodic sensitivity with rhythmic depth.
He began his musical journey as a teenager, learning guitar and performing in several bands. In 2016, he discovered the handpan, an instrument that immediately resonated with him on a deeper level and gradually became central to his artistic identity.
Since then, he has performed in streets, festivals, bars, and concert venues across different countries, connecting with diverse audiences through both intimate and large-scale performances.
Alongside his live work, Berk is deeply involved in studio production. He works from his home studio, where he composes, records, and produces his own music. His studio serves as a creative space for layering handpan, guitar, and percussion with modern production techniques, allowing him to shape fully realized, atmospheric compositions from start to finish.
His music explores a wide range of genres and textures, combining organic acoustic instruments with detailed studio production to create immersive and expressive soundscapes.


