Stereo Panner

Stereo Panner is a precision psychoacoustic audio workstation engineered to manipulate stereo channel balance, expand or narrow soundstage width, and spatialize flat mono audio recordings directly in your web browser. Music producers, podcasters, video editors, and audio restoration specialists regularly encounter spatial sound defects: field interviews where one microphone channel is substantially louder than the other, podcast voice tracks accidentally recorded on only the left channel, synth mixes that sound claustrophobically narrow, or dense musical arrangements that suffer from phase masking when played on mobile phone speakers. Resolving these spatial imbalances typically required complex digital audio workstations (DAWs) or expensive third-party stereo imaging plugins.

Conversely, traditional cloud-based audio utilities require users to upload large, unreleased audio master files to remote server processing farms. Transmitting confidential podcast interviews, private voice recordings, or commercial music stems across third-party cloud datacenters introduces severe privacy liabilities, bandwidth consumption, and prolonged waiting times. Furthermore, many online audio utilities simply scale linear channel amplitudes rather than applying mathematically correct constant-power panning laws, resulting in audible volume dips and phase distortion when panned across speakers.

Kitiverse Stereo Panner eliminates cloud dependencies by executing mathematical spatial DSP operations directly inside your browser's local memory using 32-bit floating-point linear PCM sample buffers. Our spatial processing engine incorporates two core acoustic algorithms: a Constant-Power Panning Law ($-3\text{ dB}$ center dip compensation using sinusoidal gain curves to maintain consistent perceived acoustic loudness from hard left to hard right) and a full Mid/Side (M/S) matrix processor. Mid/Side processing decomposes your stereo audio into mono sum ($M = \frac{L + R}{2}$) and directional difference ($S = \frac{L - R}{2}$) channels, allowing you to seamlessly collapse stereo audio to pure mono ($0\%$ width) or expand the acoustic soundstage up to $200\%$ ultra-wide immersion.

For mono single-microphone speech recordings or acoustic guitar tracks, the apparatus features a dedicated Haas effect micro-delay engine ($1\text{ to }30\text{ ms}$). By introducing a subtle interaural time difference between the left and right ears, the Haas effect fools the human auditory cortex into perceiving a wide, dimensional 3D space without artificial reverb smear. You can audition your spatial adjustments in real time with interactive playhead scrubbing, and export master audio in uncompressed 16-bit linear PCM WAV or high-bitrate AAC M4A containers in seconds.