int ac97_amplifier=-1;
/*
 * AC97 codecs have a control output for an external audio output amplifier 
 * (necessary in some situations such as laptops). In some cases there may be
 * need to turn this amplifier off.
 *
 * ac97_amplifier=-1 enables autodetection (default).
 * ac97_amplifier=1 always enables the output amplifier stage.
 * ac97_amplifier=0 disables it.
 */

int ac97_recselect=0;
/*
 * AC97 codecs support separate recording source selections for left and 
 * right channels. This feature can be enabled but that may cause some
 * compatibility problems with certain applications.
 * 
 * ac97_recselect=0 (default) selects common source selection for both channels.
 * ac97_recselect=1 enables independent source selections.
 */