Audio Training Files — Free WAVs
Download free reference WAVs: calibration tones, pink noise, sweeps, polarity and dynamic-range files. For honest gear and room checks. No signup needed.
Protect your hearing. Start at a low volume. Never raise the volume to make a tone audible. Levels are shown in dBFS, relative to full scale — not SPL.
How it works
Curated library of calibrated audio reference signals synthesized in-browser with live interactive preview and instant uncompressed 16-bit 44.1 kHz WAV downloads.
The Studio Calibration & Critical-Listening Library
Whether tuning a commercial control room, setting up nearfield studio monitors, testing mobile earphone drivers, or training your ears to detect distortion, reference audio files are an engineer’s primary diagnostic tool.
Signal Categories Included:
- Alignment Tones: Pure, low-distortion sinusoidal tones at -20 dBFS and 0 dBFS peak levels across critical frequencies (100 Hz, 1 kHz, 10 kHz).
- Calibrated Noise: RMS-normalized pink noise (1/f), white noise (flat per Hz), and brown noise (1/f²) for spectrum analyzers and SPL meters.
- Logarithmic Sine Sweeps: Continuous 20 Hz to 20 kHz sweeps to pinpoint room resonance modes and buzzing speaker enclosures.
- Phase & Polarity Checks: Specialized stereo pulse trains to audit speaker wiring and stereo image center focus.
- Dynamic Range Demos: Direct comparisons between uncompressed dynamic transients and soft-clipped, limited program material.
- Digital Quantization Demos: 8-bit truncation artifacts demonstrating the critical necessity of digital dither in audio mastering.
Frequently asked questions
What format are these audio test files provided in?
All audio files are rendered in uncompressed, linear 16-bit PCM WAV format at 44.1 kHz sampling rate, making them compatible with every digital audio workstation (DAW), hardware sampler, and media player.
Why should I use calibrated test files instead of compressed MP3s?
Lossy compression (MP3, AAC) introduces artifacts, alters phase coherence, and applies psychoacoustic masking filters that destroy reference calibration. Only uncompressed linear PCM guarantees bit-accurate waveforms.
What is -20 dBFS alignment level?
In digital audio broadcast standards (SMPTE RP155 / EBU R68), -20 dBFS (or -18 dBFS in Europe) represents standard alignment level, leaving 20 dB of headroom for musical peaks while aligning with 0 VU on analog consoles.
Can I use these files commercially?
Yes. All test signals generated by Audio Tests Online are public domain / royalty-free and can be freely used in audio engineering, studio acoustic calibration, and testing.