rplay README.linux - notes for Linux users.

Linux support is based on the Open Sound System driver included with
most Linux kernels.

/dev/dsp is used by default with CD quality output -- 44100 Hz,
16-bit, 2 channels.  These parameters can be changed using the
--audio-* command line options and/or ~/.rplaydrc.

When /dev/audio is used, rplayd uses 8000 Hz, 8-bit, 1 channel, and
ulaw output.

/dev/mixer is used to control the volume and configure output ports.
rplay supports headphone, lineout, and speaker.  Ports that aren't
enabled have their volume set to zero.

The --audio-fragsize rplayd option can be used to control audio device
buffering.  Fragment sizes must be a power of 2 greater than 16.  By
default, rplayd lets the audio driver pick an appropriate fragment size
which has about a 0.5 second delay.  Example sizes:

    256, 512, 1024, 2048, 4096, 8192

DSP_BUFFSIZE in the kernel sound driver may need to setup with
a different value to improve audio performance.  65536 is known
to work well with rplay.  If you hear gaps, clicks, pops, etc., try
increasing this value.

Reading audio from CDROM uses /dev/cdrom by default.  Make this a
symbolic link to your real CDROM device.  For example:

    lrwxrwxrwx   1 root     root            8 Oct  1 12:46 /dev/cdrom -> /dev/hdc

/dev/cdrom1, /dev/cdrom2, and /dev/cdrom3 can also be created if
available.  Tracks can be played using:

    $ rplay cdrom:     # play entire CD
    $ rplay cdrom:5    # play track 5
    $ rplay cdrom:1-3  # play tracks 1, 2, 3

CDROM support only works on ATAPI CDROM devices, I think.

$Id: README.linux,v 1.2 1998/08/13 06:13:03 boyns Exp $