---
title: How do I apply delay compensation and eq to my Symphony I/O MkII outputs for calibration and certification?
description: When mixing for surround and spacial formats such as Dolby Atmos or Sony 360 Reality audio, the need for applying speaker corrections such as delay, eq, bass management, etc. are part of the tools nee
---

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# How do I apply delay compensation and eq to my Symphony I/O MkII outputs for calibration and certification?

When mixing for surround and spacial formats such as Dolby Atmos or Sony 360 Reality audio, the need for applying speaker corrections such as delay, eq, bass management, etc. are part of the tools needed for a calibrated and certified monitoring system.

There are several solutions that many mixers have implemented, with Symphony I/O and other interfaces that provide these tools. Much depends on your workflow.

#### Pro Tools Dolby Renderer

If you're using Pro Tools with the standalone Dolby Renderer, everything you may need for certification is included in the latest 5.x Renderer version. I know of many studios that have received certification using these features.

- Bass management - Renderer 5.x includes basic bass management where all speakers have the same crossover frequency.
- Level/Delay - Renderer 5.x includes level and delay compensation for each speaker output.
- EQ - there's adequate EQ (16-band graphic plus some additional filters) for each speaker output.

#### Ginger Sphere

Another software option is Ginger Audio Sphere Monitor Controller for Mac:[https://gingeraudio.com/groundcontrol-sphere](https://gingeraudio.com/groundcontrol-sphere)

This software "lives" between the output of your DAW (or the Renderer) and the Symphony I/O, and offers complete bass management, level, delay and switching control. The software supports the use of the Sonarworks plugin, which is a sophisticated Room correction system that features a provision for the Dolby Target Curve.

#### Logic Pro, Nuendo, and Sonarworks

If you're using Logic Pro or Steinberg Nuendo, it's possible to integrate Sonarworks directly into the DAW for level, delay and room correction.

In our experience in Los Angeles, even the most experienced mixers are finding creative solutions to Atmos mixing without springing for one of the few but very expensive interfaces that has these tools built-in.

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