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[Enhancement]: Option to Downmix Audio Output to Mono #3108

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opened 2026-04-25 00:13:42 +02:00 by adam · 1 comment
adam commented 2026-04-25 00:13:42 +02:00
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Originally created by @jgudgell on GitHub (Nov 22, 2025).

Type of Enhancement

Server Backend

Describe the Feature/Enhancement

Hi! I’d like to request a user-selectable option to downmix Audiobookshelf playback to mono.

Why would this be helpful?

Some audiobooks place important dialogue almost entirely on one channel. When listening with a single earbud, this causes missing audio. However, I don’t want to use my device’s system-wide “mono audio” toggle because I still listen to music in full stereo, and constantly switching that setting on and off is inconvenient.

A per-user or per-session setting like “Force Mono Output (Downmix to 1 channel)”—even if it’s just implemented via an ffmpeg flag such as -ac 1 during streaming/transcoding—would solve this perfectly.

Thanks for considering it!

Future Implementation (Screenshot)

Image Image

Audiobookshelf Server Version

v 2.30.0

Current Implementation (Screenshot)

playback

Originally created by @jgudgell on GitHub (Nov 22, 2025). ### Type of Enhancement Server Backend ### Describe the Feature/Enhancement Hi! I’d like to request a user-selectable option to downmix Audiobookshelf playback to mono. ### Why would this be helpful? Some audiobooks place important dialogue almost entirely on one channel. When listening with a single earbud, this causes missing audio. However, I don’t want to use my device’s system-wide “mono audio” toggle because I still listen to music in full stereo, and constantly switching that setting on and off is inconvenient. A per-user or per-session setting like “Force Mono Output (Downmix to 1 channel)”—even if it’s just implemented via an ffmpeg flag such as -ac 1 during streaming/transcoding—would solve this perfectly. Thanks for considering it! ### Future Implementation (Screenshot) <img width="1311" height="160" alt="Image" src="https://github.com/user-attachments/assets/b8d728d2-1fe5-4a52-9180-65380ca5b9bb" /> <img width="1024" height="1024" alt="Image" src="https://github.com/user-attachments/assets/8a514cfa-6390-4e39-b552-9276515476b7" /> ### Audiobookshelf Server Version v 2.30.0 ### Current Implementation (Screenshot) playback
adam added the enhancement label 2026-04-25 00:13:42 +02:00
adam commented 2026-04-25 00:13:42 +02:00
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@jgudgell commented on GitHub (Nov 22, 2025):

Sorry about the terrible picture sizing, but the idea would be a small button near sleep etc that one could select to choose mono audio or stereo.

@jgudgell commented on GitHub (Nov 22, 2025): Sorry about the terrible picture sizing, but the idea would be a small button near sleep etc that one could select to choose mono audio or stereo.
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Reference: starred/audiobookshelf#3108
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