Drop or choose an audio file (mp3, wav, ogg, m4a).
Rate
1.00 Hz
Depth
0.80
Wet
1.00
Dry
0.00
Bias
0.00
Output
0.90
Shape
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A gentle left–right alternation. The sound moves between ears at a steady rate. Many people use it for focus or to unwind.
No. It modulates stereo position only. Your file plays as-is; pan is animated.
Common choices are ~0.8–1.5 Hz. Try the presets, then fine-tune rate and depth to taste.
Yes. Use Dry/Wet. Dry keeps your file’s native stereo; Wet applies the moving pan.
This tool rhythmically shifts sound between left and right ears. Some people find such stimulation calming or focusing. It is not a medical treatment, but it can be a practical sound aid while studying or unwinding. Here is what research says that is relevant:
PET and fMRI work shows that enjoyable music can trigger dopamine responses in striatal areas (anticipation in caudate; peak responses in nucleus accumbens). See Salimpoor et al., 2011 (Nature Neuroscience) and a broader review in Ferreri et al., 2019.
Recent work discusses how added rhythmic modulation can aid attention for some individuals, consistent with optimal-stimulation accounts of ADHD. See Woods et al., 2024 (Communications Biology). A 2023 systematic review also summarizes music’s effects in ADHD: Martín-Moratinos et al., 2023.
In trauma therapy research, alternating bilateral stimulation (eyes/tones/taps) is linked to an orienting response and working-memory accounts. See Landin-Romero et al., 2018 (review) and classic theory on the orienting response: Armstrong & Vaughan, 1996. While EMDR targets PTSD and not ADHD, these mechanisms help explain why left–right patterns can feel settling.
How to use here: try a gentle rate (~0.8–1.5 Hz), moderate depth, and keep some Dry mix if your song already has strong stereo cues. If it helps you focus, great—if it feels distracting, lower the depth or slow the rate.
This page is for personal use and learning. For diagnosis or treatment, talk to a qualified clinician.The Bilateral Audio Mixer runs locally in your browser (Web Audio API). It applies a low-frequency left↔right pan modulation (sine/triangle/square) with precise control over rate, depth, bias, and wet/dry mix. Below are research points that are relevant when people use rhythmic bilateral audio for focus or calming. This page does not provide treatment.
Alternating bilateral stimulation (eyes/tones/taps) is a core element in EMDR, an evidence-based therapy for PTSD. Major guidelines list EMDR among first-line options: U.S. VA/DoD & other guidelines, WHO (2013) guideline, APA PTSD guideline.
Mechanisms discussed in reviews include the orienting-response and working-memory load accounts as well as neurophysiological hypotheses (e.g., sleep-like processing) (Pagani et al., 2017). Classic orienting-response theory in EMDR: Armstrong & Vaughan, 1996.
Reviews indicate bilateral/alternating stimulation can trigger an orienting response and add a controlled working-memory load that reduces the vividness/emotionality of distressing content during processing (Landin-Romero et al., 2018). This mixer provides a non-clinical variant: gentle stereo alternation without exposure protocols.
Music engages dopaminergic reward circuits (caudate during anticipation; nucleus accumbens at peak emotion) (Salimpoor et al., 2011, Nat Neurosci) and dopamine manipulations bidirectionally modulate musical pleasure/motivation (Ferreri et al., 2019). Reviews summarize this reward link and memory effects (Ferreri et al., 2019 review).