Heritage Audio Adds NAM A2 Support to i73 Pro
A free firmware update lets i73 Pro owners run Neural Amp Modeler A2 captures directly on the interface's built-in DSP.
Updated on Nov. 6, 2026 in Artificial Intelligence
Heritage Audio has released a firmware update enabling its i73 Pro audio interface to host NAM A2 captures on its internal DSP. The update is free for all existing i73 Pro owners.
Why it matters
The update lets musicians run open-source neural amp and pedal models without drawing on computer CPU resources or adding latency. It extends the usefulness of hardware already owned by existing users.
Hosting NAM A2 captures on the i73 Pro's internal DSP uses no CPU resources and adds no additional latency, and the built-in loader also supports IRs and TONE3000 captures. The available model library includes hundreds of thousands of community-made captures.
The players
Heritage Audio
Heritage Audio is a manufacturer of audio interfaces and recording hardware that released the i73 Pro firmware update.
Neural Amp Modeler (NAM)
Neural Amp Modeler is an open-source technology that uses neural networks to capture the sound of amps, pedals, and signal chains as software models.
The details
Users download the latest firmware and Mixer application from Heritage Audio's website, then host .nam files directly on the interface. NAM is an open-source technology that captures amps, pedals, outboard gear, and full signal chains as neural models, and NAM A2 is the second-generation architecture designed for better sound quality with fewer computational resources.
Timeline
- June 2, 2026: NAM A2 was officially released.
- November 6, 2026: Heritage Audio launched the i73 Pro firmware update.
The Tech Race
The move follows the second-generation NAM A2 architecture, released June 2, 2026, which targets better sound quality at lower computational cost. Bringing these models onto dedicated interface DSP shifts processing away from the general-purpose computers that earlier neural modeling workflows relied on.
Existing i73 Pro owners can load NAM A2 captures, IRs, and TONE3000 captures onto the interface's built-in DSP at no added cost. Because the processing uses no CPU and adds no latency, the models can be used alongside a computer's other software without slowing it.
The takeaway
Owners of the i73 Pro can add a free capability to hardware they already have by updating firmware and the Mixer application. Checking the manufacturer's website is the way to confirm the current update before installing it.
Further reading
For more on how machine-learning models are reshaping creative tools, see Artificial Intelligence.
Source note: This article includes information reported by Sound On Sound.
