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 and character singing — recorded remotely for clients and music productions around the world.
Latin American Spanish voiceover for corporate, scientific, medical, educational, immersive and interactive experiences.
Video editing, sound-effects work, 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 remotely for clients and productions around the world.
My longest professional field: lead vocals, backing vocals, harmonies, toplines, lyrics, character singing and organised studio delivery across genres and formats.
Selected work
Studio portfolio
A selection of my vocal work across different genres and projects — lead vocals, backing vocals, harmonies and studio performances recorded for clients and music productions from different parts of the world.
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 gave existing children’s songs a more current feel for streaming content and recorded lead vocals, backing vocals and harmonies, adapting the style, tone and interpretation to each creative brief. I also wrote and performed the opening song for an animated series project — creating its lyrics and vocal melody — and recorded additional character voices for selected productions.
TheSoul Publishing
For TheSoul Publishing, I developed original songs for digital and entertainment projects from briefs and reference tracks, creating vocal melodies, toplines and lyrics when required and recording lead and additional vocal parts tailored to each song. I often shaped the first musical and vocal concept within about three days, then refined the lyrics, melodies and performances with the creative team.
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 and backing vocals, harmonies and vocal arrangements across different genres and projects.
One of my earliest long-term collaborations as a remote studio vocalist was with Argentine musician, composer and producer Horace Mix, recording lead and backing vocals, harmonies and vocal arrangements across commercial backing tracks, original music and jingles in different genres and styles, including commercial 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
Voiceover Artist
My voiceover work has taken me into some very different worlds — corporate and institutional projects, medical and scientific content, education, VR and interactive experiences — working remotely with international clients and production teams.
I record mainly in Latin American Spanish, along with selected voice guidance in Italian, adapting tone, pace and delivery to each script and audience.
Selected work
Voiceover & Narration
CORPORATE · MEDICAL · SCIENTIFIC · EDUCATIONAL · VR · INTERACTIVE
Selected work for Cochlear · Falabella Group · ADIUM · Bayer · Merck Argentina · CONAE · Banco Provincia
Adium · Programa Con Voz
I recorded the Spanish voiceover for this instructional video for Adium’s Programa Con Voz, guiding users step by step through registration and access to the 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 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, 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 that moves from everyday, emotional moments into the introduction of Cochlear technology, product presentation and brand messaging.
Editing · Sound · Content · Photography
CYAN SIGNAL
Creative work shaped through image, rhythm, sound and story.
Video editing, sound-effects work, content creation and original projects where visual identity and storytelling meet practical production.
This area brings together my developing video practice, earlier photography background and hands-on work creating connected project worlds.
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
Short-form editing, pacing, music selection and social content.
Creative content shaped around products, ideas and the brand’s visual identity.
Italian Heroes
Short-form editing, pacing, music selection and social content.
Warm narrative content built around the characters, their stories and the handmade collectible universe.
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), where I trained in composition, lighting, camera techniques and visual storytelling, working across different styles and subjects.
My journey began with analog photography, including traditional black-and-white film development and printing, and later moved into digital photography. Over time, I developed personal and creative projects exploring light, movement, composition and perspective — an approach that still influences the way I work with images, video and digital content today.