Client-Side PDF Toolkit
100% Client-Side PDF processing. No server uploads.
About Audio Channel Converter
The Audio Channel Converter & Panning Tool converts between Stereo, Mono, and Dual-Mono channel configurations, with options for Left/Right channel extraction, stereo widening, center channel vocal removal (OODC phase inversion), and panning balance.
How to Use Audio Channel Converter
Step 1
Upload a stereo or mono audio file.
Step 2
Select desired channel routing mode (e.g. "Stereo to Mono" or "Fill Left Channel to Both").
Step 3
Preview playback to verify channel balance.
Step 4
Click "Export Converted Audio".
Practical Use Cases for Audio Channel Converter
Converting Single-Ear Voice Recordings to Balanced Mono/Stereo
Fix microphone recordings that only play in the left ear by duplicating the left channel to both channels (Dual-Mono).
Creating Quick DIY Karaoke Tracks (Center Channel Vocal Removal)
Remove centered lead vocals from stereo music tracks by subtracting left and right channels ($L - R$) using out-of-phase stereo cancellation.
Input & Output Examples
Downmixing Stereo Podcast to Mono (50% File Size Reduction)
Audio: `interview_stereo.wav` (Stereo 2-Channel, 80MB)
Audio: `interview_mono.wav` (Balanced Mono 1-Channel, 40MB) | Even speech balance across both ears
Key Features & Performance
- ✓Conversion Modes: Stereo to Mono ($L+R$), Left Channel Only to Both Ears, Right Channel Only to Both Ears, Mono to Stereo, Center Channel Cancellation ($L-R$).
- ✓L/R Balance Panning slider (-100% Left to +100% Right) and Gain normalization.
- ✓Real-time stereo field visualizer.
- ✓100% Client-Side Web Audio API processing.
- ✓1-Click Download converted audio.
Key Terminology & Definitions
Center Channel Cancellation (OODC)
Inverting one stereo channel and summing with the other ($L - R$) to cancel out phantom center audio elements like lead vocals.
Mono Downmix (-3dB Rule)
Summing Left and Right channels with a -3dB gain reduction to maintain consistent perceived volume without clipping.