CD multicahnger.
================
Starting form version 3.1.1 SADP supports CD multi-changer (juke box).
It is based on the new CD-changer interface provided by CD driver
supplied with Linux kernel 2.2

To enable support of CD changer, you need to comment out line

#define CHANGER_SUPPORT

in sadp_config.h before compilation.

If CD changer support is enabled, SADP will identify the number of
slots and show an extra control, that allows changing slots at
any time. The playback automatically advances to next available
slot after finishing disc playback in normal, shuffle of list mode.

Saving mixer volumes with data.
===============================
Starting from version 3.1.2 you can save mixer voulmes for
a particular CD. It might look more logical to save volumes
with preference sets, however it may cause unexpected raise
of a volume while changing preference set, and will require
more space.

To enable saving volumes with data, run sadp with an extra
command linep arameter:

	sadp   -OX
	xsadp  -savemixer

After saving settings, you don't need to specify this parameter
again.

You can keep setting for several mixers, identified by node number.
In particular, for this purpose ALSA mixer is different from OSS
mixer referring to the same physical device.

To disable saving mixer volumes, run

	sadp  -Ox
	xsadp -nosavemixer

The mixer volumes will be kept in data base and reactivate when
'savemixer' feature is re-enabled. To delete mixer settings, you
need to edit data file.

If mixer support is disabled, with 'savemixer' is enabled, sadp will
save CD internal volume as node 0.

