Reference Tables
Quick-reference tables, charts and standards.
Decibel (dB) Reference Levels
Common sounds and their dB levels from 0–194 dB, plus safe exposure time limits.
Musical Note Frequency Chart
All notes A0–C8 with frequencies in Hz based on A440 standard tuning.
Audio Cable & Connector Reference
XLR, TRS, TS, RCA, Speakon, MIDI, USB — pin configs, balanced vs unbalanced, max lengths.
Audio File Format Comparison
WAV, FLAC, MP3, AAC, OGG — compression types, sample rates, file sizes and quality.