I’m H. Kreter (aka: Hartschaum), a Sound Designer and Mixing Engineer working with independent artists, filmmakers, and emerging creators who want a professional, emotionally impactful sound. My background is rooted in cinematic audio. I create immersive sound design, custom foley, and complete post-production mixes for film, always with a strong focus on storytelling and atmosphere. I also compose original scores and handle full audio workflows from editing to final mix and mastering. Alongside film, I work closely with musicians on mixing and mastering — both electronic and acoustic projects. I help artists refine their sound while preserving their identity. My goal is always clarity, depth, and energy that translates across all listening environments, from headphones to large systems. I understand how important it is for independent artists to feel heard and supported. That’s why I prioritize clear communication, thoughtful revisions, and a collaborative process that brings your vision to life — not just technically, but emotionally. Whether you're finishing your first EP, polishing a single, or completing a film project, I deliver industry-ready results while keeping your unique character intact.…

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I’m H. Kreter (aka: Hartschaum), a Sound Designer and Mixing Engineer working with independent artists, filmmakers, and emerging creators who want a professional, emotionally impactful sound. My background is rooted in cinematic audio. I create immersive sound design, custom foley, and complete post-production mixes for film, always with a strong focus on storytelling and atmosphere. I also compose original scores and handle full audio workflows from editing to final mix and mastering. Alongside film, I work closely with musicians on mixing and mastering — both electronic and acoustic projects. I help artists refine their sound while preserving their identity. My goal is always clarity, depth, and energy that translates across all listening environments, from headphones to large systems. I understand how important it is for independent artists to feel heard and supported. That’s why I prioritize clear communication, thoughtful revisions, and a collaborative process that brings your vision to life — not just technically, but emotionally. Whether you're finishing your first EP, polishing a single, or completing a film project, I deliver industry-ready results while keeping your unique character intact.…

Available to hire

I’m H. Kreter (aka: Hartschaum), a Sound Designer and Mixing Engineer working with independent artists, filmmakers, and emerging creators who want a professional, emotionally impactful sound.

My background is rooted in cinematic audio. I create immersive sound design, custom foley, and complete post-production mixes for film, always with a strong focus on storytelling and atmosphere. I also compose original scores and handle full audio workflows from editing to final mix and mastering.

Alongside film, I work closely with musicians on mixing and mastering — both electronic and acoustic projects. I help artists refine their sound while preserving their identity. My goal is always clarity, depth, and energy that translates across all listening environments, from headphones to large systems.

I understand how important it is for independent artists to feel heard and supported. That’s why I prioritize clear communication, thoughtful revisions, and a collaborative process that brings your vision to life — not just technically, but emotionally.

Whether you’re finishing your first EP, polishing a single, or completing a film project, I deliver industry-ready results while keeping your unique character intact.

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Language

German
Fluent
English
Advanced

Work Experience

Senior Audio & Post-Production Specialist at HK-SoundDesign (Self-Employed)
August 1, 2022 - Present
- Audio post-production for 184+ podcast episodes across editorial, narrative and branded formats - Episode runtimes ranging from 5 to 70 minutes (average approx. 40 minutes) - Extensive experience with interview-based podcasts as well as narrative storytelling formats - Dialogue editing and narrative refinement to enhance pacing, clarity and emotional impact - Sound design and original music composition to support atmosphere and storytelling - Consistent delivery for long-running formats as well as one-off productions - Reliable remote collaboration with producers, editors and content teams
Sound Designer & Versioning Editor (Film & TV) at HK-SoundDesign (Self-Employed)
August 1, 2022 - Present
- International audio versioning and M&E creation for 59 scripted TV series (45–90 min per episode) - International versioning for 8 feature films (approx. 90 min runtime each) - Dialogue editing, cleanup and preparation for foreign language versions - Creation of M&E stems compliant with international delivery standards - Ensured seamless replacement of dialogue tracks while preserving original sound design and mix integrity - Close collaboration with post-production teams, editors and production companies
Dialogue Editor, Sound Designer & Re-Recording Mixer (Film, TV & Docu) at | HK Sounddesign (Self-Employed)
August 1, 2022 - Present
- Dialogue editing, sound design and final mix for 23 film, TV series and documentary productions - Editorial dialogue work focused on clarity, pacing and emotional consistency - Sound design to support narrative structure, atmosphere and dramatic intention - Re-recording mixing for long-form formats, including films, series episodes and documentaries - Extensive experience with dialogue-heavy productions and complex narrative material - Close remote collaboration with directors, editors and post-production teams - Delivery of broadcast-ready and streaming-ready audio masters

Education

Audio Post-Production & Sound Design at ./.
February 1, 2021 - February 1, 2026
Self-taught audio professional with hands-on experience across film, TV and podcast post-production. Practical training through real-world projects and long-term professional mentorship.

Qualifications

Add your qualifications or awards here.

Industry Experience

Media & Entertainment
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    For this action-thriller short film, I was responsible for the complete sound design and final audio mix.

    My work included creating the full sonic landscape of the film — from high-impact action sequences to subtle atmospheric tension. I designed and produced custom foley to enhance realism and physicality, ensuring every movement and interaction felt immersive and believable.

    In addition to the sound design and foley production, I handled the overall audio post-production and final mix. The goal was to balance intensity, clarity, and cinematic depth while maintaining dynamic energy throughout the film.

    The result is a powerful, tension-driven soundscape that supports the narrative and enhances the emotional impact of the visuals.