# Audio Tuning Reference Generator Generate exact A=440, A=432, or custom equal-tempered reference notes and practice scales. > Canonical page: https://elysiatools.com/en/tools/audio-tuning-reference-generator - **Category:** Media - **Keywords:** tuning reference, A4 440 Hz, 432 Hz, equal temperament, scale practice, pitch generator ## Overview Create local sine-wave tuning references with FFmpeg. Choose a sustained pitch, chromatic scale, major scale, or natural minor scale; set the root note, octave, A4 reference from 400 to 480 Hz, and note duration. Every pitch follows the equal-tempered formula A4 × 2^((MIDI − 69) / 12), with short fades and a 50 ms gap between scale notes to prevent clicks and clarify note boundaries. ## Inputs - **Mode** (select) - **Root note** (select) - **Octave** (number) - **A4 tuning (Hz)** (number) - **Note duration (seconds)** (number) - **Output Format** (select) ## When to use - When you need a concert-pitch A4=440 Hz (or custom 400–480 Hz) sine tone to tune an instrument. - When you want a practice scale in major, natural minor, or chromatic order from a chosen root and octave. - When you need a click-free local reference with short fades and 50 ms gaps between scale notes. ## How it works - Select mode: sustained note, chromatic scale, major scale, or natural minor scale, plus root note and octave 2–6. - Set A4 tuning between 400 and 480 Hz and note duration from 0.25 to 10 seconds. Each pitch uses A4 × 2^((MIDI − 69) / 12). - Short fades are applied and scale notes are separated by 50 ms of silence so boundaries stay clear and clicks are avoided. - Download the result as WAV, MP3, or FLAC. ## Use cases - Create a two-second A4=440 Hz WAV to tune a guitar, piano, or other instrument to concert pitch. - Export a C major practice scale at A4=432 Hz as lossless FLAC for ear-training or rehearsal. - Generate a chromatic or natural minor scale at a custom A4 frequency for equal-tempered pitch reference. ## Frequently asked questions ### Which pitches can I generate? A single sustained note, a chromatic scale, a major scale, or a natural minor scale, using any root from C through B in octaves 2–6. ### How are frequencies calculated? Every pitch follows equal temperament: A4 × 2^((MIDI − 69) / 12), with A4 set anywhere from 400 to 480 Hz (default 440). ### Why is there a gap between scale notes? A 50 ms silence plus short fades prevents clicks and makes each note boundary easy to hear. ### What output formats are available? WAV, MP3, and FLAC. ### What duration can I use? Each note can last from 0.25 to 10 seconds (default 2 seconds). ## Related tools - [Audio Ambience Loop Generator](https://elysiatools.com/en/tools/audio-ambience-loop-generator): Extract the background ambience/room tone from a fragment and generate a seamless loop of any target length. - [Harmony Generator](https://elysiatools.com/en/tools/audio-harmony-generator): Generate transposed harmony layers at musical intervals (3rd, 5th, octave above or below) over a vocal or melody. - [Audio Read-Along Cue Generator](https://elysiatools.com/en/tools/audio-read-along-cue-generator): Generate sentence or word-level timestamp cues from a narration audio and its script, for karaoke-style reading and language learning. - [Audio Silence Generator](https://elysiatools.com/en/tools/audio-silence-generator): Generate an audio file containing only silence for a specified duration - [Audio Spectrogram Generator](https://elysiatools.com/en/tools/audio-spectrogram-generator): Generate a spectrogram image from an audio file or a video audio track - [Audio Waveform Generator](https://elysiatools.com/en/tools/audio-waveform-generator): Generate a waveform image from an audio file - [Stereo Signal Tone Generator](https://elysiatools.com/en/tools/stereo-signal-tone-generator): Generate a stereo test tone file with independent left and right channel frequency, phase, waveform, and level controls. - [Audio Loudness Report (LUFS)](https://elysiatools.com/en/tools/audio-loudness-report): Generate a report on the loudness (LUFS) and dynamic range ## Samples - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows ## Related content - [Singing and Music Practice Tools](https://elysiatools.com/en/hubs/singing-and-music-practice-tools): Shift songs into a comfortable key, find vocal range, generate tuning references, extract melody and chords, build tempo drills, add swing, and practice pronunciation with repeatable browser audio tools.