I’m a new user of DragonBoard 410c and I need to record and play sounds with it.
I’m trying to use the configuration gave in this link: https://developer.qualcomm.com/download/db410c/stereo-connector-and-audio-routing-application-note.pdf
I’ve soldered a female stereo connector with 4 terminals: pin 10 (CDC_HPH_L), pin 8 (CDC_HPH_R), pin 4 (GND) and pin 6 (CDC_MIC2_P).
To record an audio file I use the follow lines:
tinymix ‘MultiMedia1 Mixer TERT_MI2S_TX’ 1
tinymix ‘DEC1 MUX’ ‘ADC2’
tinymix ‘ADC2 MUX’ ‘INP2’
And to play a audio file I do:
tinymix ‘PRI_MI2S_RX Audio Mixer MultiMedia1’ 1
tinymix ‘RX1 MIX1 INP1’ ‘RX1’
tinymix ‘RX2 MIX1 INP1’ ‘RX2’
tinymix ‘RDAC2 MUX’ ‘RX2’
tinymix ‘HPHL’ ‘Switch’
tinymix ‘HPHR’ ‘Switch’
tinymix ‘MI2S_RX Channels’ ‘Two’
The problem is:
If I use a speaker with a 2 rings Jack P2 (left, right and gnd) it works normally with those commands. If I use a microphone with a 2 rings Jack P2, it works normally too, but it has a buzz in the back of the sound.
If I use a headset with a tip and 3 rings (left, right, gnd and microphone) it doesn’t work with those commands. So I have two question:
- Does someone know how I can take off the buzz in the sound recorded?
- Why doesn’t the Jack P2 with tip and 3 rings work with my commands?
I’m really sorry for my bad english and thanks for your time and considerations.