Signal Path is a beautiful and swift spectrum viewing app. It makes easy to look through hours worth of data, finding interesting signal peaks in long recordings (computing spectrums is backed by SIMD and GPU (Metal)). In addition, Signal Path allows recording audio data with a microphone and replaying the recorded audio. Moreover, Signal Path supports FIFO channels for importing complex signal data.
Signal Path is available for macOS, iOS, and iPadOS.
Give it a try
Try out Signal Path with this example file.
Download Example
Advanced feature: FIFO channels for importing data
Signal Path supports FIFO channels for importing data from any source.
Create FIFO recording by using File->New FIFO Recording menu item.
The file path to the channel can be conveniently copied using Edit->Copy FIFO Path menu item.
The easiest way of testing it out is by using Terminal command:
macOS 10.13: echo "$(cat /path/to/existing/file/containing/data)" > /path/to/fifo/channel
macOS 10.12: cat /path/to/existing/file/containing/data > /path/to/fifo/channel
Augmented Code 