ANR Audio Trace

Overview

Audio Trace reads a WAV file and draws its waveform as a line across the frame. The middle of the frame is the current moment: the sound just played is on the left, the sound about to play on the right, and Window sets how many seconds span the frame.

The sound comes straight from the file in WAV File: the node does not use Nuke's audio track and plays nothing. Frames per Second and Start Frame tie the file to your frames: on the Start Frame, the middle of the line shows the start of the file, shifted by Audio Offset.

Inputs

1. Sourceoptional

   The image the line is drawn over. Leave it empty to render the line alone on transparency.

2. Maskoptional

   Limits where the line appears: where its alpha is black, Source shows unchanged.

Output. The line over Source, or alone on transparency with its own alpha, covering the project format.

Quick start

1. Add ANR Audio Trace. Connect a background to Source, or leave it empty.
2. In WAV File, browse to your sound.
3. Set Frames per Second to your project's frame rate and Start Frame to the frame where the sound starts.
4. Set Window: a few hundredths of a second shows single waves, like an oscilloscope; a second or more gives a dense trace that scrolls with the sound.
5. Set Gain and Height for how far the line swings, and Baseline for its height in the frame.
6. Set Line Width and Color.

The panel

The node's panel as Nuke shows it, with the values of a new node. Click any control to see what it does; tabs and sections work as in Nuke.

All controls

Tips

• The line spans the full frame width. Place and size it with a Transform after the node, or fade its ends with a horizontal ramp in Mask.
• Add a glow after the node for a neon or monitor look.
• Audio Offset slides the sound against the picture, in seconds: a positive value shows later audio on the same frame.
• To hear the track while you sync, read the same WAV with Nuke's AudioRead node and pick it as the audio of a Flipbook.
• Use ANR Audio Bars on the same file for a matching spectrum.

Good to know

• Only uncompressed PCM (8, 16, 24 or 32-bit) and 32 or 64-bit float WAV files up to 512 MB are read. Convert MP3, AAC and other compressed audio, RF64 files and WAVs in the extensible format to a standard WAV first.
• Stereo and multichannel files are mixed to mono.
• An empty WAV File is silence. A missing or unreadable file makes the node error.
• Times before the start of the file or after its end are silent, so the line is flat there.

Works with

ANR Audio BarsTurns a music or sound WAV file into animated spectrum bars, in a row or around a circle, for music videos, lyric videos and audio visualisers.ANR GlowA soft, layered bloom around bright lights and highlights, with control over its size, spread and colour, and a matte input to choose which lights glow.