diff --git a/TODO b/TODO
index f439d2b8..5a776fa4 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,5 @@
+M add abstraction layer to control, timer, rawmidi, hwdep, seq
 M plug sync and pos problems
 M Loopback implementation?
+M change callback argument to be snd_pcm_t instead of void *
 L move OSS emulation to user space? (pseudo device driver and daemon)