[FMGEN][OPN2] Add ToDo.

diff --git a/source/src/vm/fmgen/opna.cpp b/source/src/vm/fmgen/opna.cpp
index 00628c7..c3d885f 100644 (file)
--- a/source/src/vm/fmgen/opna.cpp
+++ b/source/src/vm/fmgen/opna.cpp
@@ -2953,6 +2953,7 @@ void OPN2::SetReg(uint addr, uint data)
 //
 void OPN2::Mix(Sample* buffer, int nsamples)
 {
+       // ToDo: Implement ch.6 as PCM.
        FMMix(buffer, nsamples);
 }