TI中文支持网Phenomenon:
Iphone8 ios11.2.2, the first call is too small (it must be heard at this time to hear the maximum volume), after the call, cut off the mode, hang up the caller. The volume of the second calls will get bigger.
K256 SW4.9.6 + iphone8 ios11.2.2 can reproduce this phenomenon. The probability of reappearance is 100%.
Expectation phenomenon: the volume of incoming calls ringtone volume is consistent, not too small.
Analysis：
1. Bluetooth chip input: "Certification" iPhone 6C4D7303166E_to_BUICK 907065DAA1DD, is the air data, the first call and second calls in the air data and audio size of the same size.
2. Bluetooth chip output: btChip_to_audioDsp, the audio module writes the recording data directly to the file generation, the first call audio amplitude is obviously too small (0.005), the audio data needs to be heard by the headset; the second call amplitude is 0.05.
Conclusion:
The problem of Bluetooth chip is temporarily doubted.
Albin Zhang：
Hi Fuquan,
could you raise your questions to the English E2E forum? thanks.
e2e.ti.com/…/
BR. AZ
