Author: Jooyoung Kim

Mixing Engineer, Music Producer

Won the Gold Prize in the DTM Koshien (甲子園) + Life Update (Oct 17, 2025)

Hello, this is Mixing Engineer and Music Producer Jooyoung Kim.

Lately I’ve mostly been posting about sound engineering projects, but this time, I finally did something more in line with my role as a music producer.

DTM甲子園2025

Last month, I submitted one of my tracks to the DTM Koshien, organized by Movement Production in Japan.

To be honest, I’d been so busy afterward that I almost forgot about it—but out of a total of 431 entries, my track placed in the top 11 and was officially awarded the Gold Prize.

Everything is labeled as a “Gold Prize,” so I suppose it’s more like being recognized as a finalist. (The video thumbnail says “Gold Prize Nominee,” but it really is a Gold Prize…^^)

The song I submitted is called Seiun (星雲, “Seongun”, means “Constellation”).
Originally, it was a full track with two verses, but since the competition required only a one-verse submission, I merged the first and second verses into a single version.

Also, the bass in the song was performed by me and painstakingly edited note by note. As with most of my works, I handled everything on my own—vocals, instruments, arrangement, mixing, and mastering.

I really appreciate that, just like with Sonicwire before, Movement Production judged the entries fairly and still awarded a foreigner like me. I’d like to release the full version with both verses someday, but that’s something I’ll need to discuss further.

The awards ceremony and event, along with the grand prize announcement, will take place in Tokyo next Sunday. I’d really love to attend, but between my limited Japanese and the cost of the flight ticket… it’s not easy.

Money’s been draining fast these days. For instance, I just got my TOEFL results today—and I completely messed up the speaking section, so I’ll need to retake it… another 300 USD gone. This will be my third attempt…

These photos are from last Tuesday’s performance of Practice Piece: Triptych, held at a venue called Seoul National University Power Plant. It featured simultaneous live recording and amplification of saenghwang (Korean mouth organ), drums, processed vocals, piano, and synthesizers. The artist is considering releasing a live album, and I’m currently working on that.

Tomorrow I’m also working as a sound director for a small concert, and next week I’ll be assisting as a lecturer at a place called Arko.

Fortunately, I do have some projects lined up, like live recording for concerts and teaching—but all my earnings immediately go into buying gear like microphones and cables, so I’m broke again. ^^; I suppose that’s just the fate of those of us in music and sound.

If only I had passed the TOEFL this time, I could have worried less for a while…

On top of that, I’ve also submitted a paper with a fairly simple topic. If it gets rejected again, it’s going to hurt, but at least I managed to finish it well enough to submit. Time to start writing the next one.

Anyway, that’s a quick update from me!
See you in the next post. 🙂

XLN Audio RC-20 Retro Color Flash Sale! (~Oct 11, 60% Off)

Hello! This is Jooyoung Kim, a mixing engineer and music producer.

I’m excited to share that XLN Audio’s RC-20 Retro Color—the creative effect plugin famous for adding that authentic ‘Retro’ coloration to your sound—is having a flash sale this weekend!

I’ve received a Not-For-Resale (NFR) license to produce a thorough review for you. And if you decide to pick up the plugin using the links I provide, I’ll earn a small commission—Honestly, that small commission is a monumental help in keeping my work going and putting food on the table…:) Your support means the world to me.

Let’s start!

RC-20 Retro Color

Click image to purchase RC-20 at Plugin Boutique

RC-20 Retro Color has earned its place as one of the true ‘modern classic’ coloration plugins. Despite having been released nearly a decade ago, it remains incredibly popular, with producers all over the world still loving it. It has definitely become a steady seller in the world of creative effects.

These are the six distinct effects modules that make up RC-20’s sound design capabilities:

  1. Noise: This generator adds texture by letting you select various noise types (like vinyl crackle or tape hiss) and allows the noise level to follow the amplitude of the source material (using the Follow parameter).
  2. Wobble & Flutter: Use this to introduce the pitch inconsistencies associated with unstable analog playback (like a worn cassette or vinyl). You can also expand the effect from mono to stereo width.
  3. Distortion: This module is straightforward—it makes things sound distorted, offering a range of saturation from subtle warmth to heavy fuzz.
  4. Digital: Degrade the audio to recreate the sound of vintage digital gear by lessening the sample rate or bit depth to provoke that classic digital noise and artifacting.
  5. Space (Reverb): Simply put, this is a reverb module for adding depth and dimension.
  6. Magnetic (Volume Drops): This simulates the wear, flutter, and volume loss artifacts associated with magnetic tape recording and playback.

You also get helpful visual scopes that show you exactly how each effect module is transforming your sound in real-time.

To manage the overall vintage intensity, simply use the Magnitude fader, which controls total amount of the effects.

Finally, the bottom of the plugin offers essential final controls, letting you adjust the Input/Output Gain and apply a crucial EQ filter to shape the final tone of your colored sound.

Final Thought

Really simple, isn’t it?

The core effects are incredibly powerful, yet the parameters are streamlined and intuitive. With a plugin this effective and this easy to use, there’s truly no reason not to add it to your collection!

Purchase XLN Audio RC-20 Retro at Plugin Boutique

I especially recommend it for sound designers who frequently work on music for advertisements, as well as music producers of all genres. You’ll be able to inject a huge range of interesting and fun effects into your tracks. I think it would be particularly cool for adding grit and vibe to Rock vocals, and it’s already a staple in the production of Lo-fi music.

Softube Empirical Labs Prof Punch-Knuckles Introduction

Hello! This is Jooyoung Kim a mixing engineer and music producer.

Today, Softube’s new plugin, Empirical Labs Prof Punch-Knuckles, is released.

I received the NFR code for this product from Plugin Boutique for this review, and if you purchase the plugin using the links included in this article, I’ll earn a small commission that helps me keep going… 🙂

Let’s start!

Distressor and Mike-E

If you really interested in mixing hardware, you may know the Empirical Labs’ Distressor (EL-8) and Mike-E (EL-9).

The goal of the Distressor’s development was to create a versatile unit that could emulate the sonic signatures of many vintage compressor types, such as opto, FET, and tube designs. However, it wasn’t sound like those, but the saturation character was really great! Now, it is a compressor that has become a modern ‘classic’.

Mike-E is a channel strip whose compressor section is based on the Distressor.

And Prof Punch-Knuckles is a saturator based on those two pieces of modern classic hardware.

Empirical Labs Prof Punch-Knuckles

Click the image to purchase the Empirical Labs Prof Punch-Knuckles at Plugin Boutique

There three types in this plugin.

In the manual, those types are explained like this.

  1. Toasty: Based on the saturation in the compressor of Mike-E
  2. Crunchy: Based on the preamp distortion of the Mike-E
  3. Distress: The compressor circuit of Distressor and Mike-E

(The frequency response and the compression curve corresponds to each type’s designated sequence)

The ‘Toasty’ and ‘Crunch’ types look like soft-knee limiters, but the ‘Distress’ type clearly behaves like a hard-knee limiter.

Furthermore, the low-cut and high-cut filters aren’t merely simple attenuators. They instead emphasize the frequencies around the cutoff, creating a resonant effect.

There are 3 modes too,

  1. XFRM: Transformer distortion tone, emphasizing low frequencies
  2. Wide: A wide-range distortion
  3. Tape: Emphasizes the distortion in the top end

Harmonic distortions are quite different depending on the types and modes. I didn’t include the graph, however, because it wouldn’t be helpful for clarity.

Over All

Having used this plugin a few times, I now understand why the Distressor has been a long-time favorite. The sound of the Distortion mode is superb, and I anticipate utilizing it in several upcoming mixing projects.

Purchase Softube Empirical Labs Prof Punch-Knuckles at Plugin Boutique

I strongly recommend it specifically for the quality of its saturation.

Shadow Hills Optomax Intro Sale (-53 %, ~12/24)

Hi there! This is Jooyoung Kim, a mixing engineer and music producer. Today, I’ll introduce an optical compressor plugin, Shadow Hills Optomax.

I received the NFR code for this product from Plugin Boutique for this review, and if you purchase the plugin using the links included in this article, I’ll earn a small commission that helps me keep going… 🙂 (It’s really hard to live with this job..TT)

Let’s start!

This plugin is a digital clone of the optical part of the Shadow Hills Mastering Compressor produced by Shadow Hills Industries. The hardware, OptoGraph also inspired by the optical section of the Shadow Hills Mastering Compressor. But those two products are not exactly the same.

Click image to purchase OPTOMAX plugin at plugin boutique!

You can see that the UI of the Optomax looks very similar to that of the LA-2A. And it works like LA-2A. However, there are many adjustable parameters, unlike in the LA-2A.

First, you can change the speed of the attack/release, and ratio.

There is no official measurement data in the manual, so I measured it using Plugin Doctor. It seems that the high ratio ranges from 8:1 to 6:1, the medium ratio from 4:1 to 3:1, and the low ratio is 2:1.

And if you turn on the push button, the input gain will be pushed.

Tone and Trans parameters also exist.

Smooth tone is selected in default state, and this statement cut the high frequencies of the source. So it sounds old and lo-fi.

If you select flat, the frequency response will be very flat in whole frequency domain except super low frequencies. I recommend this statement. It’s sound is very similar to that of the Waves CLA-2A.

In Air state, super high frequencies are emphasized. You can see the frequency response in the graph.

Let’s move on to the trans parameter. It operated within the frequency response, especially in the super low frequency range. Nickel cuts the frequencies very slightly, Iron cuts them more than Nickel, and Steel cuts them more than Iron.

I recommend using Steel for vocals. It lightens the vocals, creating a difference between the CLA-2A and this plugin.

Let’s see the bottom of the plugin. Every parameter is familiar. But what is TX Drive? The term “TX” means Transformer. Therefore, TX drive refers to the harmonic distortion of the transformers. If you gain a large amount of these values, you can get a significant amount of harmonic distortion at low frequencies.

Other parameters, such as internal/external sidechains, Harmonics, Headroom,and Mix are common. So, I’ll skip them..:)

This plugin is really awesome! I think I’ll use it quite often, like the CLA-2A.

If you are interested, please find out OPTOMAX at Plugin Boutique.