fix(gallery): default audio-cpp models to backend:best (#11892)

* fix(gallery): default audio-cpp models to backend:best

The audio-cpp engine creates its session on the CPU backend when no
backend option is given, so every gallery model ran CPU-only even on
machines where a CUDA/Vulkan/Metal device was registered. backend:best
selects the best available backend and falls back to CPU.

Assisted-by: Claude:claude-fable-5
Signed-off-by: Plamen K. Kosseff <p.kosseff@gmail.com>

* docs(audio-cpp): explain gallery device selection

Document automatic compute backend selection and the CPU override.

Assisted-by: Codex:gpt-6
Signed-off-by: Plamen K. Kosseff <p.kosseff@gmail.com>

---------

Signed-off-by: Plamen K. Kosseff <p.kosseff@gmail.com>
Co-authored-by: localai-org-maint-bot <306269227+localai-org-maint-bot@users.noreply.github.com>
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Plamen K. Kosseffandlocalai-org-maint-bot authored and GitHub committed 2026-09-08 08:45:17 +02:00
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@@ -28,6 +28,11 @@ key stored *inside* the GGUF, which cannot be read from a remote repository, and
upstream GGUF repository hosts every family in one place. Set `backend: audio-cpp`
in the model YAML, or select it explicitly in the import form.
The bundled audio-cpp gallery entries set `backend:best` in `options` to select
an available compute backend, with CPU as the fallback. To force CPU execution,
replace that option with `backend:cpu`. Model configurations that omit this
option still default to CPU.
## What it serves
One model serves one family, and a family advertises the tasks it can perform. The