Mixing & Mastering Engineers, Producers & Songwriters who worked with SeMi

Welcome to Ultra Mastering — where your music gets the professional mix and master it deserves.

I am a passionate, trustable and professional sound engineer determined to make your track sound fantastic, with a solid background in studio and live sound engineering. I have studied at Pointblank London and worked with a variety of genres from rock to electronic and from gospel to heavy metal. Able to play drum, percussion, piano and guitar.

Pop-focused songwriter and vocalist - I focus on radio-ready melodies to inspire excitement and thrill. Hear more at skyestrickler.com

When I was 4 I started Musical School, piano section. There I had also singing, composing and theory classes, but when I started high-school I stopped it and I did it only as a relaxation. Then I started writing lyrics and I participated in different contests and I was awarded with semi-finalist place at Song of the Year. This was my best place.

I'm a speed producer/songwriter/singer... creating hits in 45 minutes from the instrumental to the vocals, mixed and mastered.

I've Spent Years Developing My Talents... Years Making A Name For Myself. Soon I Will Be Globally Successful And Recognized. As A Songwriter I Use My Government Name (Gregory Dell-Charnell Johnson)

a northern soul with a heart of gold

30+ years experience | Grammy FYC vocalist | Guitar Idol 8 semifinalist

Mixing & Mastering Engineer passionate about Rock, Indie, Urban, and Electronic music. I serve artists by elevating the emotion and energy of their songs, bringing clarity, depth, and impact. Every track is treated with care to ensure it connects deeply with listeners and sounds amazing everywhere.