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-rw-r--r--Demos/Device/LowLevel/AudioInput/makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/Demos/Device/LowLevel/AudioInput/makefile b/Demos/Device/LowLevel/AudioInput/makefile
index 1b7fd07a3..15ceba7a4 100644
--- a/Demos/Device/LowLevel/AudioInput/makefile
+++ b/Demos/Device/LowLevel/AudioInput/makefile
@@ -123,6 +123,7 @@ LUFA_OPTS += -D USE_FLASH_DESCRIPTORS
LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
LUFA_OPTS += -D MICROPHONE_BIASED_TO_HALF_RAIL
+LUFA_OPTS += -D USE_TEST_TONE
# Create the LUFA source path variables by including the LUFA root makefile