[BUG] Whisper STT fails with cuBLAS error on unsupported CUDA drivers without CPU fallback

[Hahaha13561]

How are you running Simpaudio?

Running from source (Python)

Which feature was affected?

Speech-to-Text (Whisper)

What happened?

Bug Description

Running the self-test (python app.py --selftest) or attempting audio transcription on certain NVIDIA GPU / driver configurations causes faster-whisper to fail with an unhandled cuBLAS exception instead of falling back gracefully to CPU execution.

Error Output / Traceback

[FAIL] whisper-stt: RuntimeError: cuBLAS failed with status CUBLAS_STATUS_NOT_SUPPORTED
Traceback (most recent call last):
  File "..\simpaudio\selftest.py", line 28, in check
    fn()
  File "..\simpaudio\selftest.py", line 80, in test_whisper
    result = stt.transcribe(wav, status_callback=lambda m: None)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "..\simpaudio\whisper_stt.py", line 21, in transcribe
    segments, info = self._model.transcribe(
                     ^^^^^^^^^^^^^^^^^^^^^^^
  File "..\simpaudio\venv\Lib\site-packages\faster_whisper\transcribe.py", line 942, in transcribe
    ) = self.detect_language(
        ^^^^^^^^^^^^^^^^^^^^^
  File "..\simpaudio\venv\Lib\site-packages\faster_whisper\transcribe.py", line 1819, in detect_language
    encoder_output = self.encode(
                     ^^^^^^^^^^^^
  File "..\simpaudio\venv\Lib\site-packages\faster_whisper\transcribe.py", line 1400, in encode
    return self.model.encode(features, to_cpu=to_cpu)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: cuBLAS failed with status CUBLAS_STATUS_NOT_SUPPORTED
[FAIL] overall: FAILURES DETECTED

What did you expect to happen?

When CUDA/cuBLAS acceleration is unsupported or fails on the host machine's GPU setup, whisper_stt.py should catch the runtime error and fall back gracefully to CPU execution (device="cpu"), or display a clear notification rather than crashing the process/failing the selftest suite.

Operating system

Microsoft Windows 11 Version 25H2 (OS Build 26200.7840)

Steps to reproduce

No response

Checklist

• I checked that a similar issue is not already reported