Problem
A vertical clip uses a mono voice track that sounds centered on one platform but is processed differently by another, making the narration feel spatially unbalanced.
Solution
Root Cause / Diagnostic:
Exporting a single-channel mono voice track routed only to Track 1 (Left channel) or failing to dual-assign mono tracks to Left and Right channels results in asymmetric playback. Certain mobile apps playback single-channel audio strictly through the left earbud, while others apply pseudostereo upmixing that smears the vocal center imaging.
Actionable Fix:
1. Route voice tracks through a Dual-Mono or Center-Panned Stereo master bus so identical signal is distributed to both Left and Right output channels.
2. In clip attributes, set channel routing to 'Mono' with output assigned equally to L (0 dB) and R (0 dB).
3. Listen through wired stereo headphones to confirm solid phantom center imaging with zero left-to-right panning tilt.
Pro Tip:
Never deliver single-channel mono audio files for social video; always deliver an interleaved 2-channel stereo file with dialogue routed equally to both channels.
Exporting a single-channel mono voice track routed only to Track 1 (Left channel) or failing to dual-assign mono tracks to Left and Right channels results in asymmetric playback. Certain mobile apps playback single-channel audio strictly through the left earbud, while others apply pseudostereo upmixing that smears the vocal center imaging.
Actionable Fix:
1. Route voice tracks through a Dual-Mono or Center-Panned Stereo master bus so identical signal is distributed to both Left and Right output channels.
2. In clip attributes, set channel routing to 'Mono' with output assigned equally to L (0 dB) and R (0 dB).
3. Listen through wired stereo headphones to confirm solid phantom center imaging with zero left-to-right panning tilt.
Pro Tip:
Never deliver single-channel mono audio files for social video; always deliver an interleaved 2-channel stereo file with dialogue routed equally to both channels.