try to figure out how ZeroGPU works

app.py

@@ -21,16 +21,15 @@ from Utility.storage_config import MODELS_DIR
 
 class ControllableInterface(torch.nn.Module):
 
-    @spaces.GPU
     def __init__(self, available_artificial_voices=1000):
         super().__init__()
-        self.model = ToucanTTSInterface(device="cuda", tts_model_path="Meta")
-        self.wgan = GanWrapper(os.path.join(MODELS_DIR, "Embedding", "embedding_gan.pt"), device="cuda")
+        self.model = ToucanTTSInterface(device="cpu", tts_model_path="Meta")
+        self.wgan = GanWrapper(os.path.join(MODELS_DIR, "Embedding", "embedding_gan.pt"), device="cuda" if torch.cuda.is_available() else "cpu")
         self.generated_speaker_embeds = list()
         self.available_artificial_voices = available_artificial_voices
         self.current_language = ""
         self.current_accent = ""
-        self.device="cpu"
+        self.device = "cpu"
         self.model.to("cpu")
         self.model.device = "cpu"
         self.wgan.to("cpu")