swap left right audio channels online
Reversed left and right channels usually come from three sources: an XLR cable plugged into the wrong side of a mic pair, inverted routing on a DAW export, or a binaural file mirrored by another tool. The trocar-canais-audio tool covers 6 operations on the first two channels of a stereo file, without touching a centre, LFE, or surround channel on a file with more than 2 channels.
The mistake is physical, in the 2-channel recorder wiring, not in the file itself, so swap fixes it without reprocessing the audio.
Correlation near -1 indicates phase cancellation between channels, the classic sign of one channel with reversed polarity at capture.
Here the problem is not swapped sides, it is content that became nearly mono, dup-left or dup-right used by mistake would do exactly that.
The common case is audio captured with the sides reversed, what was L ends up in R and vice versa. It happens with mis-wired cables, interfaces with crossed outputs, or stems received from someone else with the wrong stereo image. A plain L↔R swap fixes it with zero degradation: it is a copy of samples.
No. The operation only reassigns which decoded channel becomes left and which becomes right, without resampling, requantizing, or touching duration and sample rate. Applying the same swap a second time restores exactly the original file, sample for sample.
Swap moves position: whatever played on the left now plays on the right and vice versa. Inverting multiplies a channel by -1, changing its polarity without moving which side it plays on. These are two different faults: a cable plugged into the wrong side needs swap; reversed phase at capture needs invert-left or invert-right.
Because a mono file has only 1 channel, and 5 of the 6 operations need a second channel to swap or duplicate. Enabling them anyway would produce a file with two identical channels and twice the size, with no audible difference. Only invert-both still makes sense, since multiplying a single waveform by -1 is valid with 1 channel.
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