Audio Tools Tools
Free browser-based audio utilities for musicians, producers, and audio engineers. The Tone Generator produces precise frequencies from 20Hz to 20kHz with sine, square, triangle, and sawtooth waveforms — useful for tuning, testing speakers, and sound design. The Note Frequency Chart is a complete reference table of all musical notes from C0 to B8 with frequencies and MIDI numbers, adjustable A4 tuning reference. The Audio Speed Changer lets you upload audio files and adjust playback speed for practice, transcription, or analysis with waveform visualization and loop markers. All audio tools use the Web Audio API for local processing — your audio files never leave your device.
3 tools available
What You'll Find
This collection includes Tone Generator for generate precise audio tones from 20hz to 20khz with sine, square, triangle, and sawtooth waveforms, Note Frequency Chart for complete reference chart of all musical note frequencies from c0 to b8 — click any note to hear it, Audio Speed Changer for slow down or speed up audio files for music practice — upload mp3, wav, or ogg files and adjust playback speed. Each tool is designed to save you time and deliver professional results right from your browser.
When to Use Each Tool
Common Workflows
These audio tools tools work well together. Start with Tone Generator to generate precise audio tones from 20hz to 20khz with sine, square, triangle, and sawtooth waveforms, then use Note Frequency Chart to complete reference chart of all musical note frequencies from c0 to b8 — click any note to hear it. Combine with Audio Speed Changer to round out your workflow and cover all your audio tools needs.
Tone Generator
Generate precise audio tones from 20Hz to 20kHz with sine, square, triangle, and sawtooth waveforms.
Note Frequency Chart
Complete reference chart of all musical note frequencies from C0 to B8 — click any note to hear it.
Audio Speed Changer
Slow down or speed up audio files for music practice — upload MP3, WAV, or OGG files and adjust playback speed.
Frequently Asked Questions
Can the tone generator produce frequencies outside the audible range?
The Tone Generator supports frequencies from 20Hz to 20,000Hz, which covers the full range of human hearing. Frequencies below 20Hz or above 20kHz are outside most people's audible range and most speaker capabilities.
Does the audio speed changer preserve pitch?
The basic speed changer uses Web Audio API playbackRate, which changes both speed and pitch together. This is useful for practice (slowing down passages) but will shift pitch proportionally. For pitch-preserved speed change, dedicated audio software is recommended.
What audio formats does the speed changer support?
The Audio Speed Changer supports MP3, WAV, OGG, and other formats your browser can decode via the Web Audio API. Most modern browsers support all common audio formats.
Related Resources
Explore more tools in the Music section, or browse all categories below.