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We do Audio Visual Integration Acoustic Consulting Loudspeaker System Design Control System Programming User Interface Design Visual Media Systems

We do Audio Visual Integration Acoustic Consulting Loudspeaker System Design Control System Programming User Interface Design Visual Media Systems


“I trust the results of these rooms way more than I trusted the mixes before.”

Eduardo VaismanAudio Director, Ubisoft Toronto

“I wish I had more theatres so I could continue to work with the team at OCTAV!”

Robert GiorginiCoordinator, Wolf Performance Hall

“Our students will be able to put their experience with top-of-the-line tech on their resumé - tech we wouldn't have even known about without OCTAV's expertise!”

Dan MacInallyMedia Hub Manager, DCSA

John Herder

Design Principal

John Herder (MSc. Architectural Acoustics, CTS-D) is the founder and Design Principal of acoustics & audio-visual at OCTAV. He has worked on varied projects across Canada and the United States, and specializes in interior acoustical modeling & design, sound isolation analysis & prediction, and loudspeaker modeling, design, and optimization.  He earned his Master’s degree from Rensselaer Polytechnic Institute in Troy, New York, and has additional degrees in electro-acoustic music composition and audio engineering. John enjoys teaching about acoustics and audio systems design and has lectured at the Ontario Institute of Audio Recording Technology (OIART) in London and Metalworks Institute in Mississauga.

John enjoys playing the piano and synths, singing, and recording music with others. Whenever possible, he loves to travel with his family and “live like locals” in different global destinations.

Vivek Shankar

Acoustic & Systems Engineer

Vivek Shankar (MASc. Mechanical Engineering, PEng, CTS) is an Acoustic & Systems Engineer at OCTAV. He has a wide range of experience researching and consulting in architectural noise & vibration, and environmental acoustics, with specialization in computational acoustic analysis. Vivek is also a proficient technical and scientific programmer, having developed web-based software tools to aid Toronto’s leading acoustic consultants in solving complex acoustical challenges. Vivek oversees acoustic engineering, control systems design & programming, AV networking, and broadcast video systems. Outside of his professional role, Vivek is an avid photographer and leather restorer.

Dwayne Slack

Project Manager

Dwayne Slack (CTS, CTS-I) is Project Manager at OCTAV. Behind every OCTAV project, he is the “glue” that holds everything together in perfect balance and develops plans for seamless execution. Not only does Dwayne bring over 20 years of experience to OCTAV’s project delivery achievements, he does so in perfect alignment with one of OCTAV’s core values: creating an exceptional experience working with our team.

By choosing OCTAV, you will inevitably be in regular communication with Dwayne, and you’ll quickly realize that your project is in good hands.

Heidi Tratnik


Heidi Tratnik (CPA, CGA) acts as Controller for OCTAV. Her accounting practice fulfills the Controller function and offers internal accounting support for companies across Canada. With over 15 years of experience in companies from a variety of industries, she is focused on helping entrepreneurs turn their vision into a sustainable business. Having worked with John and OCTAV from its early days, she is excited to be a part of this thriving business.

Gem Lee

Culture & Communications Lead

Gem Lee (MSW, RSW) is a human services management professional with over 15 years’ experience in diverse sectors. As Culture and Communications Lead at OCTAV, she is passionate about building a people centred culture and genuine relationships, and clear communication. When she’s not at work, Gem is busy chasing after her adventurous toddler and volunteering at a local community health centre board.

Reg Herder

Installation Lead

As Installation Lead at OCTAV, Reg is responsible for managing the installation of acoustics and AV systems.  He has over 30 years of experience in construction and mechanics and is highly skilled at troubleshooting the realities of real buildings, turning designs on paper into real life.


Senior Installer



    88 Northcote Avenue,
    Toronto, ON M6J 3K3 Canada

    +1 416 (402) 6334