diff --git a/pcm.hh b/pcm.hh
index dd77247..e62ac54 100644
--- a/pcm.hh
+++ b/pcm.hh
@@ -20,6 +20,7 @@ template <typename TYPE>
 struct ReadPCM
 {
 	virtual void read(TYPE *, int, int) = 0;
+	virtual void skip(int) = 0;
 };
 
 }
diff --git a/wav.hh b/wav.hh
index 2ef34ab..0dd48ef 100644
--- a/wav.hh
+++ b/wav.hh
@@ -107,6 +107,10 @@ public:
 			}
 		}
 	}
+	void skip(int num)
+	{
+		is.seekg(num * channels * bytes, std::ios_base::cur);
+	}
 };
 
 template <typename TYPE>