Matrix Pattern Generator

SMPTE Color Bars1920×1080 · 59.94 fps · BT.709 · SDR

PREVIEW

Properties

Pattern

Overlays

Show title

Title

Date / time

Resolution stamp

Running timer

Timer control

Timer precision

Timer X

50%

Timer Y

16%

Timer size

10%

Running timer overlay uses a high-contrast white-on-black timecode style. It runs independently from pattern animation. When LTC visual lock is enabled, the overlay switches to SMPTE HH:MM:SS:FF (or HH:MM:SS;FF for drop-frame) and follows the LTC clock.

Logo overlay

Logo opacity

90%

Signal Metadata

Bit depth

Chroma

Range

Signal metadata is stored with project/export sidecar data. Browser canvas preview remains display-referred RGB.

Audio Test Generator

Professional Voice Loop Test

Select a professional recorded voice. Playback repeats continuously until you press Stop.

This is an audio test with the PixelMatrix Video Engineering app, built for video engineers to help. Starting test. Counting one to ten. One, two, three, four, five, six, seven, eight, nine, ten.

Professional Voice

Ara · British ready · Professional recorded MP3 · 36.6 sec

Six supplied professional recordings loop continuously and remain available offline after the app is cached.

Tone / Noise Generator

Console-style test source for checking the laptop audio feed, channels and frequency response. Pulse mode can gate tones, white noise and pink noise on/off at the selected interval.

Signal

Channel

Frequency

Custom Hz

Rotary Frequency Control

1 kHz

LOW · 20 HzHIGH · 20 kHz

Drag the knob up/down, use the mouse wheel, or use arrow keys. The control is logarithmic for useful low-to-high tone adjustment.

Waveform

Level

-18 dBFS

Pulse interval

Stopped · 1 kHz sine · Stereo · -18 dBFS

Start with speakers/headphones turned down. High-frequency tones and noise can be uncomfortable or harmful at excessive monitoring levels.

SMPTE LTC — Linear Timecode

Generates a real biphase-mark LTC audio waveform through the laptop audio output. The visual timer can be locked to the same LTC clock.

00:00:00:00

LTC / System Rate

Output channel

Output level

-18 dBFS

Lock visual timer overlay to LTC clock

Custom Start Timecode · HH : MM : SS : FF

Enter the LTC address you want, then choose Set Timecode. Reset returns to this value.

Ready · 30 fps LTC · Stereo · -18 dBFS

LTC is a square-wave synchronization signal, not listening audio. Keep monitor/headphone levels down and route it to a suitable line/timecode input. Browser dBFS is digital level before OS/interface gain and is not a calibrated analog dBu output.

Matrix Pattern Generator

Before You Use Matrix Pattern Generator

Engineering responsibility

Accuracy and browser limitations

Third-party content

Audio test safety

No warranty / limitation of liability

Responsible use