diff --git a/receive.sh b/receive.sh
index b6c4fd4..3ae1d01 100755
--- a/receive.sh
+++ b/receive.sh
@@ -31,7 +31,7 @@ fi
 # $7 = Satellite max elevation
 
 log "Starting rtl_fm record" "INFO"
-timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -f "${2}"M -s 60k -g 50 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 60000 - "${RAMFS_AUDIO}/audio/${3}.wav" rate 11025
+timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -f "${2}"M -s 60k -g $GAIN -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 60000 - "${RAMFS_AUDIO}/audio/${3}.wav" rate 11025
 
 if [ "${SUN_ELEV}" -gt "${SUN_MIN_ELEV}" ]; then
 	ENHANCEMENTS="ZA MCIR MCIR-precip MSA MSA-precip HVC-precip HVCT-precip HVC HVCT"
diff --git a/receive_iss.sh b/receive_iss.sh
index bcff229..f384b48 100755
--- a/receive_iss.sh
+++ b/receive_iss.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 datetime=$(date +"%Y%m%d-%H%M%S")
-timeout 660 /usr/local/bin/rtl_fm -M fm -f 145.8M -s 48k -g 50 -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 48000 - /usr/share/html/iss/iss-$datetime.wav rate 11025
+timeout 660 /usr/local/bin/rtl_fm -M fm -f 145.8M -s 48k -g $GAIN -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 48000 - /usr/share/html/iss/iss-$datetime.wav rate 11025
diff --git a/receive_meteor.sh b/receive_meteor.sh
index 89bfd57..626a4d6 100755
--- a/receive_meteor.sh
+++ b/receive_meteor.sh
@@ -43,7 +43,7 @@ fi
 # $7 = Satellite max elevation
 
 log "Starting rtl_fm record" "INFO"
-timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -M raw -f "${2}"M -s 288k -g 48 | sox -t raw -r 288k -c 2 -b 16 -e s - -t wav "${RAMFS_AUDIO}/audio/${3}.wav" rate 96k
+timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -M raw -f "${2}"M -s 288k -g $GAIN | sox -t raw -r 288k -c 2 -b 16 -e s - -t wav "${RAMFS_AUDIO}/audio/${3}.wav" rate 96k
 
 log "Demodulation in progress (QPSK)" "INFO"
 meteor_demod -B -o "${METEOR_OUTPUT}/${3}.qpsk" "${RAMFS_AUDIO}/audio/${3}.wav"
diff --git a/templates/noaa.conf b/templates/noaa.conf
index 1a34fb0..0aca872 100644
--- a/templates/noaa.conf
+++ b/templates/noaa.conf
@@ -11,3 +11,4 @@ LON=change_longitude
 BIAS_TEE="enable_bias_tee"
 DELETE_AUDIO="true"
 FLIP_METEOR_IMG="true"
+GAIN=50