Feature: librespot and Shairport with format: S32_LE option on USB output

Hi,

Device Id: 75185eecd8ce5ee8 ,
My DAC support S32_LE, is is possible to support dropdown in librespot and shairport in Services:
-f, --format FORMAT Output format {F64|F32|S32|S24|S24_3|S16}. Defaults to
S16.
and Shairport:

alsa =
{
output_device = “hw:0”;
output_rate = “176400”; **
** output_format = “S32”;

};