ADC_ATTEN_ADCR
snd_ca0106_i2c_write(emu, ADC_ATTEN_ADCR, ngain & 0xff);
snd_ca0106_i2c_write(emu, ADC_ATTEN_ADCR, ((ngain) & 0xff));
snd_emu10k1_i2c_write(emu, ADC_ATTEN_ADCR, ((ngain) & 0xff));
snd_emu10k1_i2c_write(emu, ADC_ATTEN_ADCR, ngain1);