mirror of
https://github.com/rmcrackan/Libation.git
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Merge pull request #1848 from rmcrackan/rmcrackan/docs-spacial-audio
new page for spacial audio info
This commit is contained in:
rmcrackan
@@ -76,6 +76,10 @@ export default defineConfig({
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text: "Easy guide to searching",
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link: "/docs/features/lucene",
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},
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{
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text: "Spatial Audio & DRM",
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link: "/docs/features/spatial-audio",
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},
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],
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},
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{
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@@ -32,6 +32,7 @@ Comprehensive documentation is available in the `docs` directory and on our [Doc
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- [Getting Started](https://getlibation.com/docs/getting-started)
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- [FAQ](https://getlibation.com/docs/frequently-asked-questions)
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- [Spatial Audio & DRM](https://getlibation.com/docs/features/spatial-audio)
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## Development & Contributing
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@@ -100,3 +100,13 @@ Symptoms include a crash on startup that mentions `LibationContext.db` under a p
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**Fix:** edit `appsettings.json` in the active revision (for example under `~/snap/libation/current/...`) so the `LibationFiles` value uses the **same** `.../snap/libation/<number>/...` as that file, or use `LIBATION_FILES_DIR`. Step-by-step context: [Install on Linux - Snap](/docs/installation/linux#snap) and [issue #1776](https://github.com/rmcrackan/Libation/issues/1776).
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3. **Non-Snap build** - If you still suspect Snap confinement after the above, try a `.deb` / `.rpm` / AppImage build from [Releases](https://github.com/rmcrackan/Libation/releases) to compare behavior.
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## Download fails with "DRM license response not OK" or "Content license denied"
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These errors come from Audible refusing to grant a download license. Common causes:
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1. **Temporary Audible outage or Plus throttling** -- wait 24 to 48 hours and try again. See the [FAQ](/docs/frequently-asked-questions).
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2. **Title requires Widevine** -- some Plus titles no longer download as AAXC; enable **Use Widevine DRM** in Settings and re-add your account if prompted. See [issue #1580](https://github.com/rmcrackan/Libation/issues/1580).
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3. **Spatial / Dolby Atmos requested (older Libation versions)** -- Audible now requires Widevine L1 for many spatial titles. Libation 13.1.3+ no longer offers spatial download. See **[Spatial Audio & DRM](/docs/features/spatial-audio)**.
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Attach your log file when opening a GitHub issue.
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@@ -18,22 +18,14 @@ Audiobooks can be requested from Audible as "Normal" quality or "High" quality,
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### Use Widevine DRM
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When this setting is disabled, all audiobooks will be downloaded using Audible's in-house DRM (AAX(C)) in the [AAC-LC](#aac-lc) format.
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When this setting is enabled, Libation will request audio files protected by Google's Widevine Digital Rights Managements scheme, and two additional settings will be unlocked: [Request xHE-AAC Codec](#request-xhe-aac-codec) and [Request Spatial Audio](#request-spatial-audio) (explained further below).
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When this setting is enabled, Libation will request audio files protected by Google's Widevine DRM scheme. This unlocks [Request xHE-AAC Codec](#request-xhe-aac-codec) for higher-quality stereo downloads on titles where Audible delivers them via Widevine L3.
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If you don't enable either of those additional options, then enabling 'Use Widevine DRM' will have no pratcical effect in nearly all circumstances. Audiobooks will be downloaded in the same [AAC-LC](#aac-lc) format with the same bitrate and the same number of audio channels. On rare occasions, enabling 'Use Widevine DRM' without the other two options will result in audio files with a different bitrate.
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If you don't enable **Request xHE-AAC Codec**, then enabling **Use Widevine DRM** will have no practical effect in nearly all circumstances. Audiobooks will be downloaded in the same [AAC-LC](#aac-lc) format with the same bitrate and the same number of audio channels. On rare occasions, enabling **Use Widevine DRM** without xHE-AAC will result in audio files with a different bitrate.
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### Request xHE-AAC Codec
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Enable this setting to request audiobooks in the [xHE-AAC](#xhe-aac) format. This codec is generally better quality than the [AAC-LC](#aac-lc) codec at the same bitrate, but it isn't as commonly supported by media players, so you may have some difficulty playing these audiobooks. The highest bitrate version of some audiobooks is only available as [xHE-AAC](#xhe-aac).
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### Request Spatial Audio
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Enable this setting to request audiobooks in a "spatial" ([Dolby Atmos](#dolby-atmos)) audio format. If an audiobook is not available in a spatial format, it will instead be downloaded in the [xHE-AAC codec](#xhe-aac).
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### Spatial Audio Codec
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Choose whether spatial audiobooks are downloaded in the [E-AC-3](#e-ac-3) or [AC-4](#ac-4) format.
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### Download My Books in the Original Audio Format (Lossless)
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If selected, Audiobooks will be downloaded and saved in the format delivered by audible (which depends on the settings explained above). Libation will not change the audio.
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@@ -77,28 +69,6 @@ Note that the xHE-AAC files authored by Audible have some USAC conformance error
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- Disagreement between stts and UsacFrame usacIndependencyFlag value.
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- Stts indicating a frame is an immediate play-out frame, but USAC AudioPreRoll is absent.
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### Dolby Atmos
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Atmos is a surround sound technology that expands on existing surround sound systems by adding height channels as well as free-moving sound objects. Audible delivers Dolby Atmos in two formats: E-AC-3 and AC-4.
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Your device's ability to play audio from these formats does not necessarily mean that the audio you are hearing is Atmos (spatial). For instance, downloading the AC-4 codec for Windows ([links in the [Supported media Players](#supported-media-players) section) will enable you to play AC-4 audiobooks, but you'll still need to download [Dolby Access](https://apps.microsoft.com/detail/9n0866fs04w8?hl=en-US&gl=US) and pay $15 to enable _Dolby Atmos For Headphones_. Please refer to [this comment](https://github.com/rmcrackan/Libation/pull/1331#discussion_r2268660524) for additional context.
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#### E-AC-3
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**Full Name:** Dolby Digital Plus (a.k.a Enhanced AC-3, DDP, DD+, and EC-3)
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**Description:**
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A proprietary digital audio compression scheme developed by Dolby Digital for the transport and storage of multichannel audio. This format can be extended to add support for Atmos, making the codec _Dolby Digital Plus Atmos_. _Dolby Digital Plus Atmos_ is backwards compatible with Dolby Digital Plus, so any media player capable of playing Dolby Digital Plus can play _Dolby Digital Plus Atmos_. Audible spatial audiobooks downloaded in the E-AC-3 format are _Dolby Digital Plus Atmos_. If they are played by a media player that supports Atmos, they will play as Atmos audio. If they are played by a media player that does not support Atmos, they will be played as traditional 5.1 surround audio.
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#### AC-4
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**Full Name:** Dolby AC-4
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**Description:**
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A proprietary audio compression technology developed by Dolby Digital for the transport and storage of audio channels and/or audio objects. Audible spatial audiobooks downloaded in the AC-4 format are 2-channel AC-4 Immersive Stereo (AC4-IMS) audio, intended for playback in headphones or earbuds (though apparently [not supported on Apple devices](https://github.com/rmcrackan/Libation/issues/996#issuecomment-3169574514)).
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## Supported Media Players
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Below is an incomplete matrix of codec support across various media players and platforms.
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@@ -115,9 +85,34 @@ Below is an incomplete matrix of codec support across various media players and
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1. Windows 11 22H2 and later
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2. On Windows [prior to Windows 11, version 24H2](https://support.microsoft.com/en-us/windows/codecs-in-media-player-d5c2cdcd-83a2-4805-abb0-c6888138e456). You can still get the codec by running the following command from a Windows PowerShell console: `winget install --id 9nvjqjbdkn97`
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3. As mentioned in the [Dolby Atmos](#dolby-atmos) section, just because a media player can play a file does not mean it's rendering Atmos. _Dolby Digital Plus Atmos_ is backwards compatible with _Dolby Digital Plus_, so media players which only support _Dolby Digital Plus_ will play E-AC-3 audio files as regular 5.1 surround without rendering the Atmos spatial qualities. Additional software or hardware support may be required for Dolby Atmos playback.
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3. As mentioned in [Spatial Audio and Dolby Atmos](#spatial-audio-and-dolby-atmos), just because a media player can play a file does not mean it's rendering Atmos. _Dolby Digital Plus Atmos_ is backwards compatible with _Dolby Digital Plus_, so media players which only support _Dolby Digital Plus_ will play E-AC-3 audio files as regular 5.1 surround without rendering the Atmos spatial qualities. Additional software or hardware support may be required for Dolby Atmos playback.
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4. You can download the AC-4 codec for Windows from 3rd party sites like [Major Geeks](https://www.majorgeeks.com/files/details/dolby_ac_3ac_4_installer.html) and [Free-Codecs](https://www.free-codecs.com/dolby-ac-4-decoder_download.htm). Once you install the codec bundle from one of those sources, the Windows store app will keep it updated. Read more about the process [in this comment](https://github.com/rmcrackan/Libation/pull/1331#discussion_r2268660524).
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5. All Android devices will support AAC-LC and xHE-AAC. Some manufactures (such as Samsung) will include Dolby codecs for playing E-AC-3 and AC-4 audio.
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6. requires FFmpeg to be [built with fdk-aac](https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_aac). You will almost certainly not find pre-build binaries in the wild due to licensing restrictions.
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7. Requires the [fdk-aac plugin](https://www.foobar2000.org/components/view/foo_pd_aac) (Windows only)
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8. Requires audio file extensions to be `.m4a` or `.mp4`. Libation sets the file extensions to `.m4b`, so you must manually change it to `.m4a` by renaming the audio file.
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## Spatial Audio and Dolby Atmos
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> [!IMPORTANT]
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> **Download status (2026):** The **Request Spatial Audio** and **Spatial Audio Codec** settings were removed in Libation 13.1.3. Audible now requires Widevine L1 (hardware-backed DRM) for many spatial titles, which Libation cannot use. Libation does not currently download new spatial/Atmos content. The sections below describe E-AC-3 and AC-4 for **playback** of files downloaded before the change. See **[Spatial Audio, Dolby Atmos, and Widevine DRM](./spatial-audio.md)** for full details and [issue #1553](https://github.com/rmcrackan/Libation/issues/1553).
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Atmos is a surround sound technology that expands on existing surround sound systems by adding height channels as well as free-moving sound objects. Audible delivers Dolby Atmos in two formats: E-AC-3 and AC-4.
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Your device's ability to play audio from these formats does not necessarily mean that the audio you are hearing is Atmos (spatial). For instance, downloading the AC-4 codec for Windows ([links in the [Supported media Players](#supported-media-players) section) will enable you to play AC-4 audiobooks, but you'll still need to download [Dolby Access](https://apps.microsoft.com/detail/9n0866fs04w8?hl=en-US&gl=US) and pay $15 to enable _Dolby Atmos For Headphones_. Please refer to [this comment](https://github.com/rmcrackan/Libation/pull/1331#discussion_r2268660524) for additional context.
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### E-AC-3
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**Full Name:** Dolby Digital Plus (a.k.a Enhanced AC-3, DDP, DD+, and EC-3)
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**Description:**
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||||
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A proprietary digital audio compression scheme developed by Dolby Digital for the transport and storage of multichannel audio. This format can be extended to add support for Atmos, making the codec _Dolby Digital Plus Atmos_. _Dolby Digital Plus Atmos_ is backwards compatible with Dolby Digital Plus, so any media player capable of playing Dolby Digital Plus can play _Dolby Digital Plus Atmos_. Audible spatial audiobooks downloaded in the E-AC-3 format are _Dolby Digital Plus Atmos_. If they are played by a media player that supports Atmos, they will play as Atmos audio. If they are played by a media player that does not support Atmos, they will be played as traditional 5.1 surround audio.
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### AC-4
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**Full Name:** Dolby AC-4
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**Description:**
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A proprietary audio compression technology developed by Dolby Digital for the transport and storage of audio channels and/or audio objects. Audible spatial audiobooks downloaded in the AC-4 format are 2-channel AC-4 Immersive Stereo (AC4-IMS) audio, intended for playback in headphones or earbuds (though apparently [not supported on Apple devices](https://github.com/rmcrackan/Libation/issues/996#issuecomment-3169574514)).
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105
docs/features/spatial-audio.md
Normal file
105
docs/features/spatial-audio.md
Normal file
@@ -0,0 +1,105 @@
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# Spatial Audio, Dolby Atmos, and Widevine DRM
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This page explains why Libation **no longer downloads Dolby Atmos / spatial audiobooks**, what changed on Audible's side, and what you can still do with Libation today.
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## Short answer
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- **Highest stereo quality:** For many titles, enable **Use Widevine DRM** and **Request xHE-AAC Codec** in Settings.
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- **Download failures:** Check logs and [Troubleshooting](/docs/advanced/troubleshoot). Some titles need Widevine; others are Audible-side throttling.
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See [What you can do today](#what-you-can-do-today) below. For Dolby Atmos / spatial specifically, see [Dolby Atmos and spatial playback](#dolby-atmos-and-spatial-playback) at the bottom of this page.
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## What changed
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### Libation 13.1.3 removed spatial download
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In [Libation 13.1.3](https://github.com/rmcrackan/Libation/releases/tag/v13.1.3), the **Request Spatial Audio** and **Spatial Audio Codec** settings were removed from the UI. Internally, spatial requests are disabled. See [GitHub issue #1553](https://github.com/rmcrackan/Libation/issues/1553).
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### Audible began requiring Widevine L1 for spatial titles
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For a time, Audible delivered spatial (Dolby Atmos) audiobooks using **Widevine L3** -- software-based DRM. Libation could work with L3 thanks to community research, notably [MSWMan's Widevine CDM work](https://github.com/rmcrackan/Libation/issues/1553).
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In early January 2026, Audible began requiring **Widevine L1** for many spatial titles. L1 ties decryption to hardware in a trusted execution environment -- the same class of protection used by Netflix, Disney+, and Prime Video. Libation runs on desktop with a software (L3) CDM and cannot satisfy L1 license requests.
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When Libation (or any L3 client) requests spatial audio today, Audible typically responds with errors such as:
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- `DRM license response not "OK"`
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- `"The device is not allowed to consume content using this codec"` / `"InsufficientSecurityLevel"`
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Streaming license requests for spatial content fail the same way. The official Audible Android app can still download spatial titles because it uses the phone's hardware-backed keys.
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### What still works
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| Format | Widevine level | Libation today |
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| :--- | :--- | :--- |
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| AAC-LC (AAXC / ADRM) | N/A | Yes, default path |
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| xHE-AAC stereo (Widevine) | L3 | Yes, with **Use Widevine DRM** + **Request xHE-AAC** |
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| Dolby Atmos / spatial (E-AC-3, AC-4) | L1 (for many titles) | No |
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xHE-AAC via Widevine L3 continues to work for many books. That gives you higher-quality **stereo**, not Atmos.
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> [!NOTE]
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> Audible may expand stricter Widevine requirements over time. Some Audible Plus titles now require Widevine where AAXC no longer works ([#1580](https://github.com/rmcrackan/Libation/issues/1580)). If ordinary (non-spatial) books start failing with license errors, report them on GitHub with logs so the project can track how far Audible is taking these changes.
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## What you can do today
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### 1. Back up books you care about
|
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Download and decrypt titles while Libation still supports the format Audible delivers for that book. DRM policies can change per title without notice.
|
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### 2. Get the best stereo quality Libation can offer
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1. Open **Settings** and enable **Use Widevine DRM**.
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2. Enable **Request xHE-AAC Codec**.
|
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3. Re-add your account if Libation prompts you (Widevine requires an Android-style device registration).
|
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4. Re-download the title.
|
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|
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See [Audio File Formats](./audio-file-formats.md) for codec details and [Supported Media Players](./audio-file-formats.md#supported-media-players) if you have trouble playing xHE-AAC.
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|
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### 3. If downloads fail even with spatial disabled
|
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|
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Check your log file ([FAQ: Where Can I Find the Log File?](/docs/frequently-asked-questions#where-can-i-find-the-log-file)) and search [open issues](https://github.com/rmcrackan/Libation/issues). Some failures are Audible-side (Plus throttling, temporary outages) rather than spatial-related. See also [Troubleshooting](/docs/advanced/troubleshoot).
|
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|
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## Will spatial download come back?
|
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|
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The Libation maintainers are watching Audible's DRM changes and will adapt if a viable path appears. There is no widely shared, reliable public method to decrypt Widevine L1 content on arbitrary PCs, and the project is not optimistic about spatial downloads returning soon.
|
||||
|
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Discussion continues on [GitHub issue #1553](https://github.com/rmcrackan/Libation/issues/1553). Maintainer context is also in [this Reddit comment](https://old.reddit.com/r/audiobooks/comments/1qu1qvy/libation_users_how_to_you_listen_to_your/o37dyw9/) from the Libation author.
|
||||
|
||||
## Dolby Atmos and spatial playback
|
||||
|
||||
> [!IMPORTANT]
|
||||
> The **Request Spatial Audio** setting was **removed in Libation 13.1.3** (January 2026). Libation cannot download new spatial/Atmos content from Audible today. The sections below cover **playback** of spatial files you may have downloaded before that change.
|
||||
|
||||
### Does "Use Widevine DRM" download spatial audio?
|
||||
|
||||
**No.** **Use Widevine DRM** unlocks **Request xHE-AAC Codec** and higher-bitrate stereo formats. It does **not** re-enable spatial/Atmos download.
|
||||
|
||||
For titles where Audible still serves a high-quality stereo Widevine stream, Widevine + xHE-AAC is the best quality Libation can obtain. That is not the same as the Dolby Atmos mix in the Audible app.
|
||||
|
||||
### Listen in Dolby Atmos / spatial today
|
||||
|
||||
- **Dolby Atmos / spatial download** is not available in current Libation versions.
|
||||
- Use the **Audible app** on a phone, tablet, or speaker that supports spatial playback for the full Atmos mix.
|
||||
- **True spatial playback** from files you own: only if you backed up spatial titles before January 2026 (see below).
|
||||
|
||||
### Playing spatial files you already have
|
||||
|
||||
If you liberated spatial titles before January 2026, your files may be **E-AC-3** or **AC-4**. Libation no longer downloads new spatial content, but existing files remain playable if your player supports those codecs.
|
||||
|
||||
Spatial audiobooks from Audible use:
|
||||
|
||||
- [E-AC-3 (Dolby Digital Plus Atmos)](./audio-file-formats.md#e-ac-3)
|
||||
- [AC-4 (Dolby AC-4 Immersive Stereo)](./audio-file-formats.md#ac-4)
|
||||
|
||||
See [Supported Media Players](./audio-file-formats.md#supported-media-players) for an incomplete compatibility list.
|
||||
|
||||
**Playing a file is not the same as hearing Atmos.** Many players decode E-AC-3 as plain 5.1 surround without rendering spatial objects. Dolby Atmos rendering often requires extra software (for example [Dolby Access](https://apps.microsoft.com/detail/9n0866fs04w8) on Windows) or hardware support. See [Spatial Audio and Dolby Atmos](./audio-file-formats.md#spatial-audio-and-dolby-atmos) for more detail.
|
||||
|
||||
If you expected Atmos but your **new** download is stereo, that is expected with current Libation versions.
|
||||
|
||||
## Related documentation
|
||||
|
||||
- [Audio File Formats](./audio-file-formats.md) -- codecs, settings, and media players
|
||||
- [FAQ: Non-spatial playback trouble](/docs/frequently-asked-questions#im-having-trouble-playing-my-non-spatial-audiobook-how-can-i-fix-this)
|
||||
- [Troubleshooting](/docs/advanced/troubleshoot)
|
||||
@@ -51,10 +51,6 @@ If you enabled the [Request xHE-AAC Codec](./features/audio-file-formats.md#requ
|
||||
1. Use a media player which supports the xHE-AAC codec. [See an incomplete list of media players which support xHE-AAC](./features/audio-file-formats.md#supported-media-players).
|
||||
2. Disable the [Request xHE-AAC Codec](./features/audio-file-formats.md#request-xhe-aac-codec) option in settings and re-download the audiobook. This will cause Libation to download audiobooks in the [AAC-LC codec](./features/audio-file-formats.md#aac-lc), which enjoys near-universal media player support.
|
||||
|
||||
## I'm Having Trouble Playing My Book with 4D, Spatial Audio, or Dolby Atmos, How Can I Fix This?
|
||||
|
||||
Spatial audiobooks are delivered in two formats: [E-AC-3](./features/audio-file-formats.md#e-ac-3) and [AC-4](./features/audio-file-formats.md#ac-4). [See an incomplete list of media players which support those codecs](./features/audio-file-formats.md#supported-media-players).
|
||||
|
||||
## I'm Having Trouble Logging Into My Brazil Account
|
||||
|
||||
For reasons known only to Jeff Bezos and God, amazon and audible brazil handle logins slightly differently. The external browser login option is not possible for Brazil. [See this ticket for more details.](https://github.com/rmcrackan/Libation/issues/1103)
|
||||
@@ -71,3 +67,19 @@ Like many countries, amazon gives South Africa it's own amazon site. [Unlike man
|
||||
|
||||
> [!NOTE]
|
||||
> (Not exactly a _frequently_ asked question but it's come up more than once)
|
||||
|
||||
## Why Was "Request Spatial Audio" Removed? Can I Still Download Dolby Atmos?
|
||||
|
||||
Libation removed the **Request Spatial Audio** option in version 13.1.3 (January 2026). Most Dolby Atmos / spatial titles can no longer be downloaded. For many titles, **Use Widevine DRM** + **Request xHE-AAC** still gets the highest **stereo** quality available -- not the Atmos mix.
|
||||
|
||||
See **[Spatial Audio, Dolby Atmos, and Widevine DRM](./features/spatial-audio.md)** for what changed on Audible's side, what still works, and what to do instead.
|
||||
|
||||
## Does "Use Widevine DRM" Still Download Spatial Audio?
|
||||
|
||||
No. **Use Widevine DRM** unlocks **Request xHE-AAC Codec** for higher-bitrate stereo. It does not re-enable spatial/Atmos download. See **[Spatial Audio, Dolby Atmos, and Widevine DRM](./features/spatial-audio.md#does-use-widevine-drm-download-spatial-audio)**.
|
||||
|
||||
## I'm Having Trouble Playing My Book with 4D, Spatial Audio, or Dolby Atmos, How Can I Fix This?
|
||||
|
||||
Libation no longer requests spatial/Atmos from Audible (see [Spatial Audio, Dolby Atmos, and Widevine DRM](./features/spatial-audio.md)). Books you liberated **before** 13.1.3 may be E-AC-3 or AC-4; newer downloads are stereo unless you kept older files.
|
||||
|
||||
For spatial files you already have, see **[Playing spatial files you already have](./features/spatial-audio.md#playing-spatial-files-you-already-have)** and [Supported Media Players](./features/audio-file-formats.md#supported-media-players).
|
||||
|
||||
@@ -139,3 +139,8 @@ Export your library to Excel, CSV, or JSON
|
||||
## I Still Need Help
|
||||
|
||||
[You can open an issue here](https://github.com/rmcrackan/Libation/issues) for bug reports, feature requests, or specialized help.
|
||||
|
||||
## Dolby Atmos / spatial audio
|
||||
|
||||
> [!NOTE]
|
||||
> Libation no longer downloads spatial (Atmos) audiobooks as of version 13.1.3. For highest **stereo** quality, see [Spatial Audio & DRM](./features/spatial-audio.md).
|
||||
|
||||
@@ -23,6 +23,7 @@ Learn about Libation's powerful features:
|
||||
- **[Naming Templates](/docs/features/naming-templates)** - Customize how your audiobook files are named
|
||||
- **[Searching & Filtering](/docs/features/searching-and-filtering)** - Find and organize your audiobooks
|
||||
- **[Easy guide to searching](/docs/features/lucene)** - Tutorial for search queries
|
||||
- **[Spatial Audio & DRM](/docs/features/spatial-audio)** - Dolby Atmos download status, Widevine L1/L3, and what still works
|
||||
|
||||
## Advanced
|
||||
|
||||
|
||||
1
index.md
1
index.md
@@ -77,6 +77,7 @@ Learn about Libation's powerful features:
|
||||
- **[Audio File Formats](/docs/features/audio-file-formats)** - Supported audio formats and conversion options
|
||||
- **[Naming Templates](/docs/features/naming-templates)** - Customize how your audiobook files are named
|
||||
- **[Searching & Filtering](/docs/features/searching-and-filtering)** - Find and organize your audiobooks
|
||||
- **[Spatial Audio & DRM](/docs/features/spatial-audio)** - Dolby Atmos download status, Widevine L1/L3, and what still works
|
||||
|
||||
### Advanced
|
||||
|
||||
|
||||
Reference in New Issue
Block a user