0
  1. I am able to upload the AMR file to SIM800C successfully.
  2. When I play the uploaded audio file during the call using the below command : 
       #if CALL_RECORDED_AUDIO
        Serial1.print("AT+CMEDPLAY=1,C:\\REC\\");                            
           // "Command Media PLAY" -> to play an audio if it is a recorded audio
       #else    
        Serial1.print("AT+CMEDPLAY=1,C:\\User\\");                           
          // "Command Media PLAY" -> to play an audio if it is a uploaded audio
       #endif

Played audio always has noise, from C:\User\.

  1. However if I record the audio during call and save it. Play the recorded audio during next call then there is no noise. ( By defining CALL_RECORDED_AUDIO in above code snippet)
Til
  • 5,150
  • 13
  • 26
  • 34
THEJUS G G
  • 1
  • 2

2 Answers2

1

according to the documentation of the sim800 it is necessary to play a sound wav during the call

Note

. mode 2 and 3 are not supported when playing audio file during call.

. The audio file can not be played duirng incoming call or outgoing call.

. Only support WAV, PCM, AMR and MP3 format.

. Only support WAV format with 8K 16bit during call.

page 201/202 of the sim800 guide

personally i did not suck having no sim800

I think the recording of a call must be in .WAV format

let me know if it works

Davidomo
  • 11
  • 1
0

The audio you play aould also be in AMR format:

AT+CMEDPLAY=1,C:\\REC\\4.AMR,1,95

I have played audio files using this command with no problems

Jakob_btrx
  • 1
  • 3