diff --git a/firmware/firmware_v1.0/prj.conf b/firmware/firmware_v1.0/prj.conf
index 7e8d55a5a..52db9d4fc 100644
--- a/firmware/firmware_v1.0/prj.conf
+++ b/firmware/firmware_v1.0/prj.conf
@@ -82,4 +82,5 @@ CONFIG_BT_AUTO_PHY_UPDATE=y
 # CONFIG_UART_CONSOLE=n
 # CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=2048
 # CONFIG_RTT_CONSOLE=y
-# CONFIG_LOG_BACKEND_RTT=y
\ No newline at end of file
+# CONFIG_LOG_BACKEND_RTT=y
+CONFIG_CODEC_OPUS=y
\ No newline at end of file
diff --git a/firmware/firmware_v1.0/src/config.h b/firmware/firmware_v1.0/src/config.h
index 5ee726309..0091e1bf8 100644
--- a/firmware/firmware_v1.0/src/config.h
+++ b/firmware/firmware_v1.0/src/config.h
@@ -15,9 +15,9 @@
 #define PDM_PWR_PIN NRF_GPIO_PIN_MAP(1, 10)
 
 // Codecs
-#define CODEC_PCM 1
+// #define CODEC_PCM 1
 // #define CODEC_MU_LAW 1
-// #define CODEC_OPUS 1
+#define CODEC_OPUS 1
 
 // Codec packages
 #if CODEC_PCM | CODEC_MU_LAW
@@ -34,9 +34,9 @@
 #define CODEC_PACKAGE_SAMPLES 160
 #define CODEC_OUTPUT_MAX_BYTES CODEC_PACKAGE_SAMPLES * 2 // Let's assume that 16bit is enough
 #define CODEC_OPUS_APPLICATION OPUS_APPLICATION_RESTRICTED_LOWDELAY
-#define CODEC_OPUS_BITRATE 64000
+#define CODEC_OPUS_BITRATE 32000
 #define CODEC_OPUS_VBR 1 // Or 1
-#define CODEC_OPUS_COMPLEXITY 8
+#define CODEC_OPUS_COMPLEXITY 3
 #endif
 #define CONFIG_OPUS_MODE CONFIG_OPUS_MODE_CELT