Stereo Test

Your Headphones Might Be Wired Wrong. This App Proves It.

Most users assume their audio channels are correctly assigned—left to left, right to right. In reality, a significant number of stereo systems, especially after firmware updates, cable swaps, or Bluetooth pairing, invert the channels. Stereo Test by Farrell is a diagnostic tool designed to detect this exact problem. It is not a music player, an equalizer, or a sound enhancer. It is a verification utility. It generates phase-accurate test signals that allow you to confirm your speaker or headphone orientation within seconds. The core mechanic is simple: the app plays a sequence of discrete left-only, right-only, and center-panned tones. Your task is to identify which ear hears which sound. If the left channel sound arrives in your right ear, your setup is inverted. The app provides immediate, unambiguous feedback.

Core Diagnostic Features

The application focuses on one primary function—channel verification—but executes it with precision. Below is a breakdown of the tools available:

• Channel Identification Test: Plays isolated left and right audio sweeps to confirm correct stereo mapping.
• Phase Alignment Check: Generates a mono signal to detect phase cancellation issues in your audio chain.
• Frequency Range Sweep: Outputs a sine wave from 20Hz to 20kHz to identify driver imbalances or roll-off problems.
• Real-time Visual Feedback: Displays a graphical waveform representation of the active channel so you can correlate audio and visual cues.

Technical Utility in Practice

Unlike consumer-grade audio apps that mask problems with EQ adjustments, Stereo Test exposes the raw state of your hardware. The interface is minimal: a single start button, a channel indicator, and a result display. There are no ads, no in-app purchases for core functionality, and no background analytics. The app operates entirely offline once installed. This makes it useful for testing second-hand headphones, diagnosing car audio systems, or verifying a new home theater setup before a critical listening session. The 0.9.7.3 version includes a calibration mode that accounts for driver latency in Bluetooth headphones, a common source of false positives in simpler test apps.

Key Specifications

• Audio Output: Supports sample rates up to 48kHz with 16-bit depth.
• Test Signals: White noise, pink noise, sine wave (selectable frequency), and stereo sweep.
• Compatibility: Works with wired and wireless audio devices; requires a standard audio jack or Bluetooth connection.
• Data Usage: No internet connection required for testing; no data is transmitted or collected.

Download Stereo Test Now

This is a limited-time opportunity for early adopters. The current version (0.9.7.3) is available for download today only. Exclusive access for first users includes all future diagnostic modules at no additional cost. Verify your audio setup before your next listening session. Download the mobile app now.

Technical Disclaimer

This application requires an active internet connection for initial download and license verification. Subsequent tests function offline. The app contains no third-party advertising but may offer optional in-app purchases for advanced diagnostic reports. Age restrictions: suitable for all ages. Data usage: minimal (under 5 MB per download). The developer, Farrell, is not responsible for hardware damage resulting from prolonged high-volume testing. Use at your own risk.