AVID 9900-58235-00 HD I/O AD Option - Analog Input Interface

Expand Your Analog Input Capabilities Instantly
The Avid HD I/O AD Option Card adds eight channels of high-fidelity analog input to your existing Avid HD I/O interface. Built to integrate seamlessly with Pro Tools | HD systems, this expansion board is designed for professional studios needing more input channels without upgrading their entire audio interface. Whether you're tracking drums, analog synths, or external mic preamps, this card ensures you can get every source into your session cleanly and accurately.

Ideal for Recording Multiple Sources Simultaneously
If you're working in an environment that demands multiple simultaneous analog inputs, this card delivers. The additional eight channels allow you to record entire ensembles, stem groups, or mic-intensive setups without compromise. It’s particularly useful for engineers handling full band tracking sessions or hybrid analog/digital workflows.

High-Quality AD Conversion with Pro Tools Integration
This card provides pristine analog-to-digital conversion to maintain the integrity of your recordings. Engineered to meet the same standard as Avid’s flagship interfaces, it ensures low distortion, minimal noise, and accurate dynamic range. With direct integration into the HD I/O chassis, you get full control and monitoring of input levels via the Pro Tools software interface.

Customizable Input Expansion for HD I/O Chassis
Designed to install easily into the HD I/O chassis, the AD Option Card can be used to expand your current analog input count or to replace an existing card. Whether you’re running the 8x8x8, 16x16 analog, or a hybrid I/O setup, this modular approach gives you flexibility as your studio evolves. Just make sure you have an available slot—or be ready to swap a card if necessary.

Engineered for Maximum Audio Integrity and Flexibility
From critical source capture to detailed multitrack input configurations, this card supports signal paths where maintaining analog character and headroom matters. It's a go-to solution for producers and engineers who prioritize audio accuracy and want direct analog inputs managed natively in the Pro Tools HD workflow.