Split stereo channels and extract left/right or mid-side audio— Separate tracks for editing, mixing, and analysis
Isolate left and right channels or extract mid-side components from stereo audio. Convert tracks into dual-mono formats and work with individual channel data for mixing, mastering, and detailed audio analysis.
Audio Channel Splitter — Extract Left and Right Channels as Separate Files
Stereo audio contains two independent channels that may carry completely different information. A dual-interview recording captured with lavalier microphones often places one speaker exclusively in the left channel and another exclusively in the right. A mid-side stereo recording encodes a center mono signal (mid) in the left channel and a difference signal (side) in the right. A film dialogue track may carry the edited production dialogue in the left channel and a clean room tone reference in the right. Splitting channels extracts each independently for separate processing and editing.
Post-production audio repair frequently requires channel splitting. If noise contamination affected only the left channel, splitting allows noise reduction to be applied to the left channel independently without touching the right. If the right channel clipped due to a level error during recording, split the channels, apply clipping repair to the right channel only, then recombine. Working on the stereo file directly would require very narrow frequency-selective processing that risks damaging the unaffected channel — splitting makes the repair surgical.
Mid-side decoding is the specialized channel splitting use case for stereo recording engineers. A mid-side pair is captured with a cardioid microphone facing forward (mid) and a figure-eight microphone facing sideways (side). This is not a usable stereo image — it must be decoded into left-right stereo using the matrix L = M + S, R = M - S. The channel splitter extracts mid and side as separate mono files that are then processed through the decoding matrix. MS recording provides independent control over stereo width at decode time, allowing the stereo image to be narrowed or widened in post without re-recording.