---
title: "AN-21 Audio Related Charts, Graphs and Tables of Values"
description: This is a general knowledge application note of value to all audio professionals and enthusiasts. It contains audio related charts and graphs i including 78 RPM and LP record equalization curves and speed charts, Stylus charts, Tape equalization curves, Electron…
url: "https://diamondcut.com/docs/an-21-audio-related-charts-graphs-and-tables-of-values/"
updated: "2022-01-31"
category: Application Notes
---

# AN-21 Audio Related Charts, Graphs and Tables of Values

This is a general knowledge application note of value to all audio professionals and enthusiasts. It contains audio related charts and graphs i including 78 RPM and LP record equalization curves and speed charts, Stylus charts, Tape equalization curves, Electron Tube charts and much more. Its a great reference paper.

Click here to [view the PDF version](https://www.diamondcut.com/AppNotes/AN21%20-%20Audio%20Related%20Charts%2C%20Graphs%20and%20Formulae.pdf)