From: Mike Brady <mikebrady@eircom.net>
Date: Sat, 25 Aug 2018 09:51:18 +0000 (+0100)
Subject: Update INSTALL.md
X-Git-Tag: 3.2.2~30
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4115ff76cf648839b86d29f86e2da91b6b9ca327;p=thirdparty%2Fshairport-sync.git

Update INSTALL.md
---

diff --git a/INSTALL.md b/INSTALL.md
index 6cacd24c..d45477c6 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -11,6 +11,8 @@ Do the usual update and upgrade:
 # apt-get upgrade
 # rpi-update
 ``` 
+**Note:** it is a particularly good idea to update the Pi's firmware using `rpi-update` because, at this time of writing (September 2018), a [significant improvement](https://github.com/raspberrypi/firmware/commit/200c2f4dd54b2048b5dcb8661ea3f232beb7d81e) has been made to the [timing software](https://github.com/raspberrypi/firmware/issues/1026) of the built-in audio DAC's drivers.
+
 (Separately, if you haven't done so already, consider using the `raspi-config` tool to expand the file system to use the entire card.)
 
 ### Activate the Improved Audio Driver
@@ -64,7 +66,7 @@ Now to configure Shairport Sync. Here are the important options for the Shairpor
 // Sample Configuration File for Shairport Sync on a Raspberry Pi using the built-in audio DAC
 general =
 {
-  drift_tolerance_in_seconds = 0.010;
+  // drift_tolerance_in_seconds = 0.010; // this is no longer necessary if you have updated the Pi's firmware using rpi-update (see above).
   volume_range_db = 50;
 };