Audio Test & Tone Generator
This audio test tool allows engineers to generate high-precision sine waves and pink noise for calibrating broadcast audio levels and PA systems.
Essential for verifying Dante signal paths, analog gain staging, and loudspeaker phase. Explore more broadcast engineering tools for IP video and media networking.
Master Control
Frequency & Sweep
Waveform
Channels
Broadcast Audio Diagnostics Guide
This professional audio test suite is engineered for broadcast engineers and AV technicians. Generating precise reference tones (Sine, Pink Noise) and observing them through integrated analysis tools allows for rapid troubleshooting of signal paths across Dante networks, SDI chains, and PA systems.
1. Phase & Goniometer Interpretation
A Goniometer (or Vectorscope) visualizes the phase relationship between Left and Right channels. A vertical line indicates a perfect mono signal (in phase). A broad or horizontal shape indicates significant stereo width or a phase inversion issue. If your Goniometer shows a horizontal line, check your BNC or XLR cables for polarity errors.
2. Reference Level Calibration
In broadcast, we don't use "max" volume. We use alignment levels. Our -18dBFS (EBU R128) and -20dBFS (SMPTE RP155) buttons provide the standard 1kHz reference tone used to calibrate analog gear to match digital headroom.
Common Troubleshooting Checklist:
- Stereo Testing: Use the Left/Right isolation to verify that I/O mapping across the router is correct.
- Channel Phase: Use the Phase Inverter. If the signal vanishes when summed to mono, your speakers are correctly in-phase.
- Speaker Resonance: Run a 10s Frequency Sweep to identify physical rattles or frequency cancellations in the listening room.
Frequently Asked Questions
Pink noise has equal energy per octave, making it sound "flat" to the human ear. It is the industry standard for calibrating speaker systems and room EQ.
Play a mono tone and hit "Phase Invert." If the sound gets "wider" and hollow, they were in phase. If the bass increases and the sound moves to the center, your speakers were wired out-of-phase.