> 5.7 | Electrical Characteristics of the Voiceband Part

> 5.7.1 | Setting Audio Parameters by AT Commands

> The audio modes 2 to 6 can be adjusted according to the parameters listed below. Each audio mode is assigned a separate set of parameters.

> Table 34: | Audio parameters adjustable by AT commands

> Parameter | Influence to | Range | Gain range | Calculation
> inBbcGain | MICP/MICN analogue amplifier gain of baseband controller before ADC | 0...7 | 0...42dB | 6dB steps
> inCalibrate | Digital attenuation of input signal after ADC | 0...32767 | -...0dB | 20 * log (inCalibrate/ 32768)
> outBbcGain | EPP/EPN analogue output gain of baseband controller after DAC | 0...3 | 0...-18dB | 6dB steps
> outCalibrate[n] n = 0...4 | Digital attenuation of output signal after speech decoder, before summation of sidetone and DAC Present for each volume step[n] | 0...32767 | -...+6dB | 20 * log (2 * outCalibrate[n]/ 32768)
> sideTone | Digital attenuation of sidetone Is corrected internally by outBbcGain to obtain a constant sidetone independent of output volume | 0...32767 | -...0dB | 20 * log (sideTone/ 32768)

> Note: The parameters outCalibrate and sideTone accept also values from 32768 to 65535. These values are internally truncated to 32767.