I have arduino UNO hooked up with wtv020-sd-16p and it works fine, playing audio files - speaker is connected right to the WTV020's pin #4 and #5. However, volume is rather low. So I have ordered LM386 amplifier module. I have wired it's IN pin with WTV020's pin #2 AUDIO-L. But no sound comes out of speaker. I can hear only some scratches from the speaker while arduino is running.
LM386 is pretty easy, only VCC, IN and GND pins, so there is nothing much to screw up. I am wondering, what could be the problem ?
Thanks for any help or hints in advance.
EDIT: Only to note, when WTV020 is playing sound, speaker goes completely mute. When it doesn't play sound, little scratchy sounds can be heard from speaker. Maybe it could help with analysis ?