[PATCH] Add virtio sound device specification

---
 content.tex      |   1 +
 virtio-sound.tex | 461 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 462 insertions(+)
 create mode 100644 virtio-sound.tex

diff --git a/content.tex b/content.tex
index 8f0498e..5c2356a 100644
--- a/content.tex
+++ b/content.tex