DFplayer mp3 speaker out (which is + or -)
Account cancelled 2017-07-21 08:05:54 2230 Views1 Replies hello.
I'm using the DFplayer module to play some audios on system start-up. However, I want to mix the audio with a line-in from another device.
The line in from the other device comes with Left, Right and Ground. But the MP3 Player only has 2 outputs, it doesn't specify which is + or which is ground so I mix the proper signal with the Right Channel and the other one with the ground channel.
Can anybody help me out? cheers
I'm using the DFplayer module to play some audios on system start-up. However, I want to mix the audio with a line-in from another device.
The line in from the other device comes with Left, Right and Ground. But the MP3 Player only has 2 outputs, it doesn't specify which is + or which is ground so I mix the proper signal with the Right Channel and the other one with the ground channel.
Can anybody help me out? cheers
2017-08-02 00:13:58 For earphones, normally you only need the left, right DAC and GND, you can have a look at the attached pic robert.chen
robert.chen 