Bilateral Stimulation Research-backed

Combined Visual + Audio BLS

Visual dot synced with alternating left/right audio tones. Dual-channel BLS for clients who benefit from multiple modalities.

This is a reference tool, not a replacement for EMDR therapy. EMDR must be delivered by a trained clinician. If you are using these tools outside of therapy and become distressed, stop, ground yourself, and contact a mental health professional.

Before you start

Photosensitive epilepsy warning: this tool uses sustained horizontal motion.
Headphones required for audio component.
Not recommended for home use without clinician supervision.

Open in fullscreen

Settings

Preset

Preset name

Motion

Speed (Hz) 1.0 Passes / set 24 Continuous Movement path Pacing Fade side to side instead of moving

Keeps the left-right alternation without sustained motion.

Appearance

Color theme Target Size 48 Glow Trail Target color Background

Sound

Sound Pitch (Hz) 440 Left-right separation 85% Sound style Volume 30% Chime at the end of a set

Background sound Background level Base pitch (Hz) 200 Offset (Hz) 4.0

Headphones needed for left-right separation.

Settings saved on this device

0 / 24

This tool uses motion by design. The settings panel can switch it to a side-to-side fade instead.

Clinical sources

Shapiro, F. (2018). Eye Movement Desensitization and Reprocessing (EMDR) Therapy: Basic Principles, Protocols, and Procedures, 3rd ed. Guilford Press.

What this is

Combines the moving visual dot and alternating stereo tones into a single synchronized experience. Audio can be toggled on or off without restarting the visual.

When to use it

When multi-modal BLS is desirable — some clients process more effectively with dual channels.
As a fallback if the client starts to dissociate on single-channel BLS; the extra sensory input can help maintain dual attention.

Clinical notes

Visual and audio are driven from the same internal clock — when the dot hits the left edge, a left-panned tone plays; right edge, right tone. Audio can be muted on the fly via the checkbox.