Neural Amp Modeler is an open-source project that captures the tonal character of analog audio gear by training a neural network on paired dry and reamped audio recordings. It provides a complete pipeline for learning how a guitar amplifier, effects pedal, or other audio device transforms a signal, then exports the trained model into a portable file format for use in other applications.
The project centers on a file-format-based approach to model distribution, where each trained neural network is saved as a single .nam file that can be shared and loaded by different host applications. A real-time inference engine processes live audio streams with low-latency neural network forward passes, enabling the emulated device to be used in performance or recording contexts.
The training workflow uses a supervised learning approach, taking a dry input recording and a reamped output recording as paired training data to learn the device's transfer function. Once trained, the model weights and architecture are serialized into a compact, portable format that simplifies model management and swapping across different software environments.