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SMPTE 12M · Linear timecode

LTC Timecode Generator

Render a biphase-mark LTC audio track as a broadcast WAV. Set the start timecode, frame rate and length, then export.

Start
01:00:00:00
→
Last frame
01:09:59:24
HH:MM:SS:FF
PAL / EBU
HH:MM:SS, real time
Peak level of the square wave
8 hex digits, BG1 → BG8

First frame, bit by bit

Timecode digits User bits Flags (drop frame, colour frame, polarity, BGF) Sync word Faded cells are 0 bits

Each frame is 80 bits of biphase-mark code: every bit starts with a level change, and a 1 bit adds a second change at its midpoint. The polarity bit keeps every frame's count of 0 bits even, so each frame starts on the same edge.

The output is mono PCM. Edges are band-limited to the sample grid to keep rise times close to the 25 µs the spec asks for.