From 56fdd00c82f02bb01dfb509c6d7ff4c6ad291f4d Mon Sep 17 00:00:00 2001
From: Alan Johnston <alan.b.johnston@gmail.com>
Date: Wed, 3 Jun 2026 11:16:00 -0400
Subject: [PATCH] Update pacsat.sh fix RTL-SDR Loopback

---
 groundstation/pacsat.sh | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/groundstation/pacsat.sh b/groundstation/pacsat.sh
index 8a2c6696..fed60904 100755
--- a/groundstation/pacsat.sh
+++ b/groundstation/pacsat.sh
@@ -210,8 +210,7 @@ sudo killall -9 zenity &>/dev/null
 
 sudo usermod -a -G gpio pi
 
-if [ "$lpf" = "0" ] && [ "$txc" = "0" ] ; then
-  loopback=1
+if [ "$txc" = "0" ] ; then
 
   value=`aplay -l | grep "Loopback"`
   echo "$value" > /dev/null
@@ -224,7 +223,7 @@ if [ "$lpf" = "0" ] && [ "$txc" = "0" ] ; then
 
 fi
 
-if [ "$loopback" = "1" ] ; then
+if [ "$loopback" = "1" ] || [ "$txc" = "0" ] ; then
 
   echo "Using Audio Loopback"
   ADEVICE="ADEVICE plughw:CARD=Loopback,DEV=1"