diff --git a/audio/internal/convert/resampling.go b/audio/internal/convert/resampling.go
index 34b2077c8..2a9a0de50 100644
--- a/audio/internal/convert/resampling.go
+++ b/audio/internal/convert/resampling.go
@@ -243,10 +243,3 @@ func (r *Resampling) Seek(offset int64, whence int) (int64, error) {
 	}
 	return r.pos, nil
 }
-
-func (r *Resampling) Close() error {
-	if closer, ok := r.source.(io.Closer); ok {
-		return closer.Close()
-	}
-	panic("audio/internal/convert: r.source must be io.Closer")
-}