Change Playback Speed

Use this when

Normal 1x playback is too fast to study a target, or you need to scan through a long pass faster than real time.

Before you start

• A recording must be loaded.
• The speed button is in the bottom-right of the playback control bar. It shows the current speed (for example, 1x, 2x, or 0.5x).

Change speed using the menu

1. Click the speed button in the bottom-right of the control bar. A small menu opens above it.
2. Select a speed from the list. Available options are 0.25x, 0.5x, 1x, 2x, 4x, 8x, and 16x.
3. The menu closes and playback continues at the new rate. The button label updates to show the selected speed.

Selecting a speed from the menu always sets the direction to forward. If you were playing in reverse, the recording will switch to forward at the chosen speed.

Change speed using the keyboard

1. Press L to play forward at 1x. Press L again while playing forward to step up through the speed options (1x, 2x, 4x, 8x, 16x).
2. Press J to play in reverse at 1x. Press J again while playing in reverse to step up through the same speed options.
3. Press Space or K to stop at any speed.

Switching direction (from L to J or vice versa) resets the speed back to 1x.

What you should see

The speed button label in the control bar reflects the current setting. At speeds above 1x, a fast-forward or rewind icon appears next to the label while playback is running.

If it does not work

• Speed button is grayed out — no recording is loaded. Open a recording first.
• Speed jumps back to 1x unexpectedly — pressing J or L in the opposite direction resets to 1x by design. Choose your direction before ramping up speed.
• Very high speeds appear to skip frames — at 8x and 16x the sonar may redraw only a subset of pings. This is expected. Slow back down when you need fine detail.