From 1822c5c908d46b76573df2069653081e31058796 Mon Sep 17 00:00:00 2001
From: "lyuxiang.lx" <lyuxiang.lx@alibaba-inc.com>
Date: Mon, 19 Jan 2026 10:48:24 +0800
Subject: [PATCH] fix fm train bug

---
 cosyvoice/flow/flow_matching.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/cosyvoice/flow/flow_matching.py b/cosyvoice/flow/flow_matching.py
index a45337a..d3beb9e 100644
--- a/cosyvoice/flow/flow_matching.py
+++ b/cosyvoice/flow/flow_matching.py
@@ -174,8 +174,7 @@ class ConditionalCFM(BASECFM):
 
         # random timestep
         t = torch.rand([b, 1, 1], device=mu.device, dtype=mu.dtype)
-        if self.t_scheduler == 'cosine':
-            t = 1 - torch.cos(t * 0.5 * torch.pi)
+
         # sample noise p(x_0)
         z = torch.randn_like(x1)