Add manual cast to LTX2 vocoder conv_transpose1d (#12795)

* Add manual cast to LTX2 vocoder

* Update vocoder.py

Author: kijai

comfy/ldm/lightricks/vocoders/vocoder.py

@@ -2,6 +2,7 @@
 import torch.nn.functional as F
 import torch.nn as nn
 import comfy.ops
+import comfy.model_management
 import numpy as np
 import math
 
@@ -125,7 +126,7 @@ def forward(self, x):
         _, C, _ = x.shape
         x = F.pad(x, (self.pad, self.pad), mode="replicate")
         x = self.ratio * F.conv_transpose1d(
-            x, self.filter.expand(C, -1, -1), stride=self.stride, groups=C
+            x, comfy.model_management.cast_to(self.filter.expand(C, -1, -1), dtype=x.dtype, device=x.device), stride=self.stride, groups=C
         )
         x = x[..., self.pad_left : -self.pad_right]
         return x