.NET library for creating spectrograms

WARNING: This software project is pre-alpha! This repo is just a place to collect ideas and code.

This example converts a 3 minute WAV file (Mozart's Piano Sonata No. 11 in A major) to a spectrograph and saves the output as a JPG. When you know the song, you can recognize the individual notes by looking at the picture.

var spec = new Spectrogram.Spectrogram();
float[] values = Spectrogram.WavFile.Read("mozart.wav");
spec.Add(values);
spec.SaveBitmap("mozart.jpg");

• render horizontally or vertically
• optional display of axis labels (scales)
• create bitmaps in real time from audio input
• advanced color (LUT) options
• advanced intensity options (nonlinear scaling)
• create a user control to display a spectrogram
• create a user control to adjust spectrogram settings

• microphone spectrograph in C#
• QRSS Spectrograph in C#
• Simulation of QRSS Signals

• What is QRSS?
• QRSS and you
• QRSS (slow CW)

• Argo (website) - closed-source QRSS viewer for Windows
• SpectrumLab (website) - closed-source spectrum analyzer for Windows
• QrssPIG (gitlab) - open-source spectrograph for Raspberry Pi (C++)
• Lopora (website) - open-source spectrograph (Python 3)
• QRSS VD (github) - open source spectrograph (Python 2)

• A spectrogram is an image
• A spectrograph is a machine
• Stop using the word spectrograph in software!