Senior Sound Editor | Composer | Re-Recording Mixer | Digital Creator
With over 35 years in the music industry and 24 years as a composer, sound editor, and re-recording mixer, Walder Martinez has shaped the sonic identity of award-winning films, immersive series, and emotionally charged stories. His portfolio spans from acclaimed productions for Prime Video to independent sci-fi films and haunting thrillers, as well as composing music for advertising for leading brands such as Unilever, Coca-Cola, and Microsoft. As founder of La Galera Multimedia, Walder merges technical mastery with artistic depth to transform every project into an unforgettable sensory experience.
As a curious and creative person, he stays up-to-date with new technologies and artificial intelligence, while also creating his own content.
Some of my clients:
“Sound is 50% of the movie-going experience.”
George Lucas
SOUND EDITOR
Walder turns images into full sensory experiences. His meticulous, story-driven approach has brought life to thrillers, dramas, and science fiction films—from cinemas to streaming platforms.
COMPOSER
With a unique emotional sensitivity, Walder composes and produces music that elevates the narrative. His work ranges from atmospheric minimalism to cinematic grandeur, always in service of the story.
SOUND DESIGNER
More than a technician, Walder is a natural storyteller. From script to final sound edit, he understands the emotional rhythm of each scene and amplifies it with sounds that speak to the soul.
POST-PRODUCTION EXPERT
With decades of experience in editing, mixing, and technical supervision, Walder leads post-production workflows with surgical precision. Every project—large or small—receives the same level of excellence.
DIGITAL CREATOR
As a curious and creative person, he stays up-to-date with new technologies and artificial intelligence, while also creating his own content.
He's working on his very first short film called The Abyss and a wide range of multimedia content.
Walder's music on SoundCloud
My 7 Grandmas
Dialogue Editor
Gigi, an atheist teenager (Kate Larson), is forced to move from California to Minnesota with her mother (Candace Kirkpatrick) to help take care of her aging Grandfather (Jeff Allen) when his life spirals out of control after Grandma's death.
The Scream in the Blood
Composer
This is the story of Cali (Abel Ayala), a teenager whose father was killed during a horse race, and he must quickly become a man, driven to avenge that death. Cali seeks revenge, but first finds the love of Lucía (Florencia Otero) and help in Don Chusco (Horacio Guarany), an old ranch foreman who adopts him as his own son.
Nemesis
Composer - Full Audio Post-Production
Father Thomas, nearing retirement, becomes engrossed in mysterious Byzantine discoveries from Istanbul and enlists Adriel, a young multilingual priest, to help translate cryptic letters. Adriel catches the attention of Grace, Father Thomas' free-spirited daughter, who is curious about his mysterious past.
Check out what clients say
Walder Martínez and La Galera are synonymous with creativity and pure talent. I deeply admire each of his productions, especially his musical endeavors. We worked together on three movies: "Comienzo", "El Inquilino", and "La Ultima" and the last one was awarded at the Huelva Film Festival He has a unique vision that transforms any project into something extraordinary. I always look forward to his next creations!
Fran Bueno
Spain
Working with Walder on my short film "The Wind" was an absolute gift. His expertise in sound design brought an incredible depth of texture, mood, and tone to the piece. Walder was an absolute pro at every stage of our collaboration, from crafting dramatic foley and layered SFX to beautifully balancing dialogue, which was crucial for this story. He approached the final mix with such care and intention that it elevated the entire experience, giving the visuals a powerful and emotional harmony. Walder is both a craftsman and an artist, and I look forward to our next collaboration.
Adam Peditto
USA
MechWest - TV Series
Re-Recording Mixer: Walder Martinez
Pearl West's offbeat enthusiasm for mechs isn't shared by the rest of her Wild West town but with the arrival of "Six" - a curiously intelligent mech - Pearl's unique compassion begins turning the world on its head. Pearl sets out on the cattle drive carrying a big secret. If Six is discovered by her brother - or worse, the bandits - it's all over for Pearl and her new friend.
Series creator David Gallagher was formerly a Character Development Supervisor at Blue Sky Studios, working on films such as Ice Age (2002/2012), Robots (2005) and Rio (2011).
Whatch the episodes on YouTube.
English 
Spanish