Ideas can take many forms: a song, a voice, a story, an image, a character, an entire world…
Some begin as little more than an intuition.
Others arrive quite clearly and simply need to find a way to become real.
I’m Vero Holfeltz and I’d like to welcome you to Ondina Studio.
Choose your signal
001Studio vocals, lead and backing vocals, harmonies, toplines, songwriting, jingles and character singing — recorded from my home studio for clients and music productions around the world.
Latin American Spanish Voice Over for corporate, scientific, medical, educational and immersive work.
Video editing, sound effects editing, creative content, photography and original project worlds shaped through visual storytelling.
Studio voice · Melody · Performance · Since 2005
VIOLET SIGNAL
Professional Vocalist · Voice Artist · Topliner · Songwriter · Character Vocalist
Vocal performance, melodies and words shaped around the musical identity and the unique story each project seeks to tell — recorded from my home studio for clients and productions around the world.
My longest professional field: lead vocals, backing vocals, harmonies, toplines, lyrics, jingles, character singing and organised studio delivery across genres and formats.
Selected work
Studio portfolio
A broad selection of my vocal work across different genres and projects: lead vocals, backing vocals, harmonies and studio performances, showcasing different styles, ranges and vocal approaches.
Scroll through the list inside the ReverbNation player to see and listen to every track in the selection.
Spotify
My official Spotify artist profile, where you can find original music and released collaborations featuring my work as a vocalist and songwriter.
DARKSIGHT · PROJECT CRYSTALYSIS · The Espressos
DARKSIGHT is part of PROJECT CRYSTALYSIS, an anime-style universe by The Espressos that brings music, video games and comics together. At the heart of its story is a character who unlocks the ability to see and fight spirits unable to pass into the afterlife.
For DARKSIGHT, I joined that world through the music, writing the lyrics and vocal melody and recording both the lead and backing vocals.
Acoustic Ballads
Five acoustic covers showing a softer, more intimate side of my voice, where the focus is simply on tone, interpretation and emotion.
“Sex Ball” · Shaka Ponk
A very different side of my voice: more dynamic, demanding and playful, with plenty of room for vocal control, versatility and interpretation.
“Rivers in the Desert” · Persona 5
My vocal take on “Rivers in the Desert” from Persona 5 — and a chance to explore video game music through a different side of my vocal style.
LAIAN Studios & Marketing SL
For LAIAN Studios & Marketing, I recorded Spanish-language songs and character voices for children’s entertainment and toy projects, including musical and character parts for TROTTIES and NENUCO. Working from musical references and production guidelines, I adapted the voice, interpretation and personality to each character and song, recorded spoken dialogue when required, and prepared the complete vocal material for the final productions.
Nenuco · Christmas Song
For this Nenuco Christmas song, I recorded the Spanish sung vocals along with some of the character voices and spoken phrases heard throughout the piece.
Trotties · “Juntas Somos Invencibles”
I performed the Spanish sung and spoken character vocals for “Juntas Somos Invencibles”, giving voice to the characters both in the song and in its spoken and recited sections.
Trotties · Mel’s Song
For Mel’s song, I recorded the Spanish sung vocals and character voices, including the spoken and rhythmically recited parts performed by the character.
SINGLEFRAME
For SINGLEFRAME, I worked on an animated children’s series intended for streaming platforms that has not yet been released. My work included giving well-known children’s songs a more modern musical and interpretive approach, recording lead vocals, backing vocals and harmonies, and adapting my performance to each creative brief. I also composed and performed the opening song for the series, creating its melody and rhythm entirely with my voice, and recorded additional character voices for selected parts of the project.
TheSoul Publishing
For TheSoul Publishing, I worked from creative briefs, references and initial ideas to develop original songs for digital content. Depending on the project, I composed the song or created its lyrics and vocal melody, then recorded the vocals for the final piece. The songs were created for use across major digital platforms, including Instagram, TikTok, YouTube and Spotify.
Here are a few songs from that collaboration, including both songwriting work and vocal performances:
“Boom” · Vocal melody & lyrics
“Love Tonight” · Vocal melody & lyrics
“Swipe Left” · Lead vocals
“Show Me” · Lead vocals
“Turn It” · Lead vocals
Long-term collaborations with musicians and composers, recording Lead Vocals, Backing Vocals, Harmonies and Vocal Arrangements across different genres and projects.
One of my earliest long-term collaborations as a Studio Vocalist working from my home studio was with Argentine musician, composer and producer Horace Mix, recording Lead Vocals, Backing Vocals, Harmonies and Vocal Arrangements across commercial backing tracks and original music in different genres and styles, as well as jingles for clients across Latin America.
Selected commercial jingles
I collaborated with Argentine musician and composer Manuel Ansaldi on his solo album Mirando el Sol, creating and recording Backing Vocals, Harmonies and Vocal Arrangements around his Lead Vocals and compositions on several songs, including “No Supe Ver”, “Abismo”, “Cada Segundo”, “Soñando la Paz” and “Mirando el Sol”.
Selected songs
Latin American Spanish · Corporate · Scientific · Immersive
MAGENTA SIGNAL
Voice Over Artist
My Voice Over work has taken me into some very different worlds — corporate and institutional projects, medical and scientific content, education, VR and interactive experiences — working from my home studio with international clients and production teams.
I record mainly in Latin American Spanish, adapting tone, pace and delivery to each script and audience.
Selected work
Voice Over & Narration
CORPORATE · MEDICAL · SCIENTIFIC · EDUCATIONAL · VR · INTERACTIVE
Voice Over projects for Cochlear · Falabella Group · ADIUM · Bayer · Merck Argentina · Secretaría de Innovación, Ciencia y Tecnología / CONAE · Banco de la Provincia de Buenos Aires
Adium · Programa Con Voz
I recorded the Spanish Voice Over for this institutional video for Adium, a pharmaceutical company operating across Latin America, guiding users step by step through registration and access to its Programa Con Voz patient support program.
ARTEMIS–ATENEA · CONAE
I narrated the Spanish version of the ARTEMIS–ATENEA immersive experience, telling the story of the ATENEA microsatellite project and Argentina’s participation in Artemis II for the Secretaría de Innovación, Ciencia y Tecnología (Secretariat of Innovation, Science and Technology of Argentina) / CONAE.
Falabella · VR Experience
For this project, I voiced the female robot character in an immersive VR experience developed for Falabella Group, a Latin American business group operating across retail, financial services and shopping centers, welcoming users, guiding them through the interactive options and delivering the closing message at the end of the experience.
Cochlear
I recorded the Spanish Narration for an audiovisual presentation for Cochlear, a medical technology company specializing in implantable hearing solutions. The piece moves from everyday, emotional moments into the introduction of Cochlear technology, product presentation and brand messaging.
Video Editing · Multimedia · Content · Photography
CYAN SIGNAL
CREATIVE WORK SHAPED THROUGH IMAGE, RHYTHM, SOUND AND STORY.
Video editing, content creation and original projects where visual identity and storytelling meet practical production.
My professional background in photography shapes the way I see and approach visual work, naturally finding its way into my video work and creative projects.
Selected work
Guadalajara, corazón de la Navidad · Video Mapping
A project that took me somewhere a little different: sound effects for “Guadalajara, corazón de la Navidad”, a video mapping production created for the Three Kings Day celebrations and projected directly onto the façade of the historic Palacio del Infantado in Guadalajara, Spain.
My part was to find and select sound effects for specific moments in the production, then edit and synchronize them with the corresponding visual actions and timing of the mapping.
The Mushroom Store
The Mushroom Store is an independent creative brand built around original designs, products and projects. My work includes Short-form Video Editing, Pacing, Music Selection and Social Content, shaped around the products, ideas and visual identity of the brand.
Italian Heroes
Italian Heroes brings together original handmade collectible characters inspired by Italian food and culture. For the project, I create and edit Short-form Videos and Social Content that bring the characters, their stories and their world to life.
Photography
Photography was part of my creative path long before video. I graduated from A.F.P.R.A. — Asociación de Fotógrafos Profesionales de la República Argentina (Association of Professional Photographers of the Argentine Republic) — where I trained in composition, lighting, camera techniques and visual storytelling.
I began with analog photography, including traditional black-and-white film development and printing, before moving into digital photography. That background influences the way I approach composition, light and visual storytelling in my work.
