diff --git a/SongGeneration/codeclm/models/codeclm.py b/SongGeneration/codeclm/models/codeclm.py
index 133d6b2..b8a364f 100644
--- a/SongGeneration/codeclm/models/codeclm.py
+++ b/SongGeneration/codeclm/models/codeclm.py
@@ -107,6 +107,7 @@ class CodecLM:
                  vocal_wavs: torch.Tensor = None,
                  bgm_wavs: torch.Tensor = None,
                  return_tokens: bool = False,
+                 gen_type: str = "left blank",
                  ) -> tp.Union[torch.Tensor, tp.Tuple[torch.Tensor, torch.Tensor]]:
         """Generate samples conditioned on text and melody.
 
@@ -148,7 +149,7 @@ class CodecLM:
         if return_tokens:
             return tokens
         else:
-            out = self.generate_audio(tokens)
+            out = self.generate_audio(tokens,gen_type=gen_type)
             return out
 
 
@@ -271,13 +272,19 @@ class CodecLM:
         return gen_tokens
 
     @torch.no_grad()
-    def generate_audio(self, gen_tokens: torch.Tensor, prompt=None, vocal_prompt=None, bgm_prompt=None, chunked=False):
+    def generate_audio(self, gen_tokens: torch.Tensor, prompt=None, vocal_prompt=None, bgm_prompt=None, chunked=False,gen_type="left blank"):
         """Generate Audio from tokens"""
         assert gen_tokens.dim() == 3
         if self.seperate_tokenizer is not None:
             gen_tokens_song = gen_tokens[:, [0], :]
             gen_tokens_vocal = gen_tokens[:, [1], :]
             gen_tokens_bgm = gen_tokens[:, [2], :]
+            if gen_type == "bgm":
+                gen_tokens_vocal = torch.full_like(gen_tokens_vocal, 3142)
+                vocal_prompt = None
+            elif gen_type == "vocal":
+                gen_tokens_bgm = torch.full_like(gen_tokens_bgm, 9670)
+                bgm_prompt = None
             # gen_audio_song = self.audiotokenizer.decode(gen_tokens_song, prompt)
             gen_audio_seperate = self.seperate_tokenizer.decode([gen_tokens_vocal, gen_tokens_bgm], vocal_prompt, bgm_prompt, chunked=chunked)
             return gen_audio_seperate