---
title: "Diagnose one-sided headphone audio · Sound Boost"
description: "Check one-sided browser audio with original and comparison sources and understand balance and mono as optional Plus tools."
url: https://soundboost.impulse-apps.de/en/guides/one-sided-audio-and-headphones/
language: en
website: Sound Boost
publisher: Impulse Apps
---

Access and help

# Diagnose one-sided headphone audio

One-sided audio may come from the recording, output device or mixer settings. Identify its scope before making changes.

By Impulse Apps · Content reviewed on 7 October 2026

## Only this source or every source?

Listen to the affected passage with Power off. Then test a known stereo clip using the same output device. If the issue affects every application, inspect headphones and device settings outside Sound Boost.

With an existing Plus entitlement, check Balance Center and Mono off as baseline. Mono may change how a one-sided recording plays, but does not restore a missing separate audio channel.

## A traceable channel test

1. Listen to the affected source without processing.
2. Test a known stereo source with the same device.
3. If Plus: check balance and mono separately.
4. Listen to both sides again after each change.

## Check device faults outside the tab

Sound Boost does not control every application or the entire computer. A damaged connector, system balance or headphone issue needs the relevant device check. Do not permanently alter tab settings to conceal an unknown global cause.

## Use a known source as the control

The control source needs to contain both channels. An arbitrary clip may itself be one-sided and is then not a useful device test. Choose known stereo material and listen to both sides moderately. If testing another device, record it as a separate change. Do not attribute improvement from switching devices to a tab mixer adjustment. Keep the test sequence in your listening log.

With Plus access, an intentional balance shift may later be forgotten. Check Center and Mono off before judging the recording. If one clip becomes clearer in Mono, that finding applies to that clip and device. It does not establish a restored stereo channel. Return to neutral and test ordinary content afterwards.

## A worked example

Only a training video plays on the left, while music through the same headphones plays on both sides. This suggests a source-specific issue. With existing Plus access you can deliberately test Mono. If every sound is on the left, start with device balance and connector. These cases need different next steps.

Add your observations. This template processes no files and sends no report.

### Check the result

### If something is wrong

**Observation and next step**

| Observation | Next step |
| --- | --- |
| Every application affected | Check device and system balance. |
| Only one clip affected | Inspect the recording and optionally test existing Plus Mono. |
| Only after changing mixer | Compare Balance Center and Mono off. |

## Common questions

**Does Mono repair headphones?**

No. It changes this tab’s playback and does not repair hardware.

**Is balance included in Free?**

Balance and mono belong to the protected Plus mixer; Free controls single-channel gain.

Browser activation and a Plus entitlement are separate requirements. Protected content and specialised players can have their own limitations.

[Help and contact](https://soundboost.impulse-apps.de/en/support/)

## Continue here

[Understand the Plus mixer](https://soundboost.impulse-apps.de/en/guides/balance-and-mono/)

### Use balance and mono in the Plus mixer

Understand left and right channels, test balance and deliberately listen to stereo in mono.

**Read the guide**

[Access and help](https://soundboost.impulse-apps.de/en/guides/no-audio/)

### No audio or no player control?

Check the source, mute state, audio output, tab activation and browser limits when Sound Boost behaves unexpectedly.

**Read the guide**

[Start and volume](https://soundboost.impulse-apps.de/en/guides/compare-settings-fairly/)

### Evaluate settings with a fair listening comparison

Compare Sound Boost settings using the same passage, similar loudness and a concrete listening goal.

**Read the guide**