Closes#1879.
mlx-audio raises a bare ValueError in its own vocabulary — "No conditionals
available. Either provide audio_prompt/audio_prompt_sr for voice cloning, or
ensure conds.safetensors is in the model directory." — and the generate route
passed it straight through as the 400 detail. The user was told to supply an
argument they have no way to name and to check for a file they have never heard
of, when what happened is simply that they asked to clone with nothing to clone
from.
Classified now, with a remedy in the user's terms: pick a profile that has a
saved reference clip, or record one. It also notes that a designed voice with
no saved reference cannot be cloned from, which is the case that produces this.
The route still passes through every ValueError it cannot classify. Most are
VoiceStudio's own validation messages and are exactly what the user should
read, so replacing them wholesale would have been a regression — tests pin four
of them as untouched.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017ypcgSsh5j2PEonSJiAU1S
