Miracle FX Tone Generator
What it doesGenerates audio test tones and synthesis building blocks across the full frequency range. Designed for producers and engineers needing quick reference tones, tuning checks, and sample creation.
ExportAll tones export as WAV at multiple sample rates and bit depths. Octave ZIP export generates all 12 notes for a selected octave in one click. Frequency range extends to C10 (~16 kHz+) for equipment testing — see the Export tab for full details.
Controls
Frequency
Note selectorSelect a musical note (C through B) and octave. The frequency display updates in real time.
Fine tuneAdjust pitch in cents (±50 cents). 100 cents = 1 semitone. Useful for creating detuned oscillator pairs or tuning to non-standard references.
Amplitude & Shape
VolumeOutput level. For export, set this to 0 dB (full scale) to maximise headroom in the WAV file — attenuate at the destination.
Attack / ReleaseEnvelope shaping. Attack ramps the level up from silence; release fades it out. Prevents clicks at note start and end. Minimum values (~1ms) are recommended for test tones.
Tuning — A=440 vs A=432
A=440 HzThe international standard since 1955 (ISO 16). Every major orchestra, DAW, tuner, and instrument is calibrated to this. Use this for anything intended to sit alongside other audio.
A=432 HzTunes every note down by approximately 32 cents relative to 440. It has a dedicated following in certain wellness, meditation, and esoteric music communities who find it warmer or more natural-sounding. The science supporting these claims is thin, but the preference is genuine and widespread enough to be worth accommodating. Verdi reportedly favoured a lower tuning standard in the 1800s, which some proponents cite as historical precedent. In practice, a 432 Hz tone exported and played back in a 440 Hz session will be detectably flat — use with intention.
Export Options
Single Tone
DurationLength of the exported WAV in seconds. For sustained tones, 4–8 seconds is standard. For one-shots and samples, 1–2 seconds.
Sample Rate44.1 kHz for music and DAW use. 48 kHz for video and broadcast. 96 kHz for high-resolution work. Higher rates increase file size proportionally. Note: to export frequencies above ~20 kHz without aliasing, use 88.2 kHz or 96 kHz.
Bit Depth16-bit for CD and streaming compatibility. 24-bit for production and mixing (recommended). 32-bit float for maximum headroom in DAW sessions.
Frequency Range — C0 to B10
Why so high?Human hearing spans roughly 20 Hz to 20 kHz. Octaves C0–C6 cover the musical range. C7 and above enter equipment testing territory — useful for verifying tweeter response, checking speaker crossover points, and stress-testing DAC output stages. C9–C10 go ultrasonic (above 16 kHz), where the tones are inaudible to most adults but measurable with analysis tools. No other Miracle FX instrument reaches these frequencies — that is the point.
Keyboard rangeThe piano keyboard covers C0–C8 (up to ~4 kHz) where keys remain a meaningful way to select pitch. C9 and C10 are accessible via the Note / Frequency dropdowns only — at those frequencies you are operating a signal generator, not playing an instrument.
Octave ZIP Export
12 notes · 1 octaveGenerates 12 WAV files — every semitone in the selected octave — and packages them into a ZIP download. MFX filename convention applied: MFX_ToneGen_[note]_[freq]Hz_[dur]s_[sr]k_[bd]bit_[ch].wav
Use caseCreate a pitched sample set for Sublim8, Sampl8, or any ROMpler. Export multiple octaves separately to build a full chromatic library.