Hey there! I’m Jooyoung Kim, an engineer and music producer.
This month, Brainworx is holding their Mixing Month sale, featuring six plugins at a discount:
- Shadow Hills Mastering Compressor – Compressor
- Shadow Hills Mastering Compressor Class A – Compressor
- Black Box Analog Design HG-2 – Saturator
- Black Box Analog Design HG-2MS – Saturator
- Mäag Audio EQ4 – EQ
- SPL Transient Designer Plus – Transient Shaper
Following my last post, today I’ll be introducing the Mäag Audio EQ4 and SPL Transient Designer Plus.
As I’ve mentioned before, I personally bought and use 1, 3, and 5. For this round, I received NFR (Not for Resale) licenses for 2, 4, and 6 from Brainworx via Plugin Boutique.
If you purchase through the links in this blog, I’ll earn a small commission, which really helps me keep going—so thank you!
Let’s dive in!
5) Mäag Audio EQ4 – EQ
The Mäag Audio EQ4 is a plugin recreation of the iconic EQ4 hardware from Mäag Audio. I’ve mentioned this EQ a few times in my mixing basics series, and its standout feature is the AIR BAND.

Just loading the plugin already shapes the frequency response a bit—it’s slightly bumpy, right?

Here’s what happens when you nudge up the 20kHz band. This EQ excels at lifting those ultra-high frequencies to bring out a pleasing “air” in your mix.
I often choose between this Mäag EQ4 and Slate Digital’s Fresh Air when I want to give vocals that shiny, polished feel—it depends on the track. There’s no harmonic distortion here, which keeps it clean and super easy to tweak. That’s why I highly recommend it. Honestly, I love this vibe so much I keep thinking about getting the hardware version too… haha! If you grab it during this sale, I’m sure you’ll find plenty of uses for it.
6) SPL Transient Designer Plus
The SPL Transient Designer Plus is a plugin inspired by the TD (Transient Designer) module from the discontinued SPL RackPack, a 500-series rack format.

It’s incredibly simple to use:

The Attack knob boosts or softens the attack phase, while the Sustain knob boosts or reduces the sustain phase. That’s it!

Below that, the Link button decides whether it processes stereo channels together or independently. The Limit button adds a limiter to prevent clipping if the attack gets too aggressive. And Parallel Mix? Well, that just blends the processed signal with the dry one.

The Side Chain Filter lets you use a sidechain signal to trigger changes in the original source’s transients—think of it like a compressor’s sidechain. Hit the SC ON button to activate it. By default, it uses an Internal Side Chain, copying the input signal and applying a filter. You can press SC SOLO to hear what’s being used as the trigger. The SC EXT button switches it to an external sidechain signal instead.
For composers or engineers like me, a transient-shaping plugin like this is a must-have. A great composition or mix depends on instruments locking together just right. You can’t always achieve that by simply sliding tracks around in your DAW.
I’ve got transient tools from Sonnox, Metric Halo, Native Instruments, SPL, iZotope, and more in my collection. This one’s another solid option—pick it up during the sale, and I bet you’ll use it all the time.
That wraps up my coverage of this month’s Brainworx sale. See you in the next post!

