SimCom SIM900 AUDIO
Manuals and User Guides for SimCom SIM900 AUDIO. We found 1 manuals for free downloads Application Note
Below you will find brief information for GSM/GPRS module SIM900 AUDIO. The SIM900 series GSM/GPRS module offers a comprehensive set of features, including voice calling, SMS messaging, data transfer, and a variety of audio capabilities. The SIM900 AUDIO Application Note provides information about the SIM900's audio algorithms, tuning parameters, and detailed audio tuning process. It covers topics such as echo cancellation, echo suppression, and sidetone adjustment. The document also highlights key features like the initial echo matter, sidetone self-adaptive matter, and the relationship between CLVL and other audio settings. These features can help you optimize audio performance in your device.
Key Features
Echo cancellation
Echo suppression
Selective echo suppression
Audio channel switching
Microphone volume adjustment
Receiver volume adjustment
Sidetone volume adjustment
Echo volume adjustment
Audio tuning parameters
Detailed audio tuning process
Pages: 13 SimCom SIM900 AUDIO Application Note
Brand: SimCom Category: Mobile phones Size: 223 KB
Languages: English
Open manualFrequently Answers and Questions
How to switch channels?
Use AT+CHFA command.
How to adjust microphone volume?
Use AT+CMIC command.
How to adjust receiver volume?
Use AT+CLVL command.
How to adjust sidetone volume?
Use AT+SIDET command.
How to adjust echo volume?
Use AT+ECHO command.
What is the initial echo matter?
The SIM900 algorithm needs to go through a period of voice training learning sequence. There is a 5-second initial echo when a call is first set up or the audio channel is switched.
What is the sidetone self-adaptive matter?
Changing CLVL value will cause SIDET changes. It is intended to hold the same sidetone under different volumes.
How does CLVL affect other audio settings?
Changing CLVL parameter will change RING/CLDTMF/STTONE/SIMTONE loudness.
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