My name is Jaroslav Holub, I am sound engineer, producer and composer. I am the founder and owner of the post-production music studio Develop Device based in Pilsen, Czechia. As has already been said, I will only do post-production! So, please, do not contact me for recording. Thanks!


I offer a comprehensive range of services for music production, mixing and mastering. I specialize only in metal and its sub-genres. I'm not afraid to experiment and my main focus is that the result will sound modern and competitive, exactely what is needed nowadays.


They will help you to achieve professionally sounding mixes simply, without spending hundreds of hours of self-study or buying expensive mixing courses.

How does it work?

Step 1

We share raw tracks

We will share the files and discuss your project - What sound do you like and what are your goals.

Step 2

Mixing & mastering process

I will lock the doors to my studio and work on developing your ideas.

Step 3

The work is done

You will receive a link to your song and you will feel great.

I accept Cubase, Pro Tools, Reaper or Studio One projects or consolidated files with zero start. Send them in whatever source format you’ve been using, do not convert the sample rate or bit depth. Make sure you record in 24 bit or higher. It’s a good practice to clean the projects from hidden or unwanted tracks. And always include a monitor/rough mix! It doesn’t matter how bad it sounds, it’s only there for us to know that the files are in sync and that nothing’s missing.

Have you recorded your guitars and bass tracks with Di signals? I am happy to re-amp them if needed.