2021-11-26 14:21:00 (UTC-03:00)

Marcel Rodrigues <marcelgmr@gmail.com>

add some docs to README

diff --git a/README.md b/README.md
index 75af8fb..0c0c4d4 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,36 @@
 # qmp
+
 quick music player
 
 A terminal player for [qms](https://github.com/lecram/qms).
+
+## Building
+
+Assuming you have qms sources alongside the qmp folder:
+
+```
+$ cd qmp
+$ cc -o qmp -I../qms/ ../qms/qms.c ../qms/smf.c qmp.c
+```
+
+## Running
+
+Currently qms sends samples to stdout. Pipe to
+[aplay](https://github.com/alsa-project/alsa-utils) to get sound.
+
+```
+$ ./qmp song.mid | aplay -q -t raw -f cd
+```
+
+## Controls
+
+```
+  q       quit
+  SPACE   pause/resume
+  z/x/c   tempo down/reset/up
+  ,/.     seek back/forward 5 seconds
+  </>     seek back/forward 30 seconds
+  0..9    seek to N*10% time of song
+  m       set mark
+  j       seek to mark
+```