.TH DBFSD 1 "July 23, 2002"
.SH NAME
dbfsd \- DB Fourier Synthesis Daemon
.SH SYNOPSIS
.B dbfsd
.RI [ options ]
.br
.SH DESCRIPTION
The audio daemon \fBdbfsd\fP serves as the backend part to the
\fBDBMix\fP-project.  It allows to connect several audio streams and
combines them into one, using high quality Fourier synthesis.  Connections
currently transfer data via pipes; a network (socket) connection method is
being developed, but not yet included.  Use \fBdbcat\fP
to push audio streams into \fBdbfsd\fP.  The mixer settings
are controlled via \fBdbmixer\fP.
.PP
\fBDbfsd\fP actually can handle two different output destinations: one is
the master device, usually used for the main output; the second one is
referred to as the cueing device, which is handy for so-called pre-fade
listening.  That is, one can check the starting position of the next song,
or adjust its pitch before sending it to the main output.  Obviously, for
stereo output to both the master and the cueing device, two sound cards
(or a sound card with two distinct output channels) are needed.  The
\fB\-e\fP switch offers a way to cue with only a single sound card, but
output is reduced to mono streams.
.SH OPTIONS
.TP
.BI \-a " dev"
Set master output device to \fIdev\fP.  (Default: \fB/dev/dsp\fP.)
.TP
.BI \-b " dev"
Set cue output device to \fIdev\fP.  (Default: \fB/dev/dsp2\fP.)
.TP
.B \-c
Enable cue output.  (Default: cueing disabled.)
.TP
.B \-d
Print out debug messages to console.  (Default: debugging disabled.)
.TP
.B \-e
Output cue as left channel of master out.  This option also enables cue output
even if \fB\-c\fP is not set.  (Default: cue to both channels of cue output
device.)
.TP
.B \-h
Print summary of available options.
.TP
.BI \-n " max"
Allow at most \fImax\fP input channels.  (Default: 4.)
.TP
.TP
.B \-o
Send master output to stdout.  (Default: send output to master output device.)
.TP
.BI \-r " n"
Set number of OSS output fragments to \fIn\fP.  Decreasing this number will
reduce latency between, say, starting \fBdbcat\fR, and hearing the results
of that action.  Too low a value, however, will results in drop-outs in the
stream.  This value can also be adjusted via the preferences dialog in the
dbmixer application.  (Default: 128.)
.TP
.BI \-s " n"
Set number of input channels that should be created as sockets to \fIn\fP.
(Default: 0.)
.TP
.B \-v
Print version information.  (Default: no version information.)
.SH FILES
.TP
.BI /tmp/ch n _comm
Pipe to input channel \fIn\fP.  Direct use of the pipes is deprecated, use
\fBdbcat\fP instead.  The pipes expect audio input in unsigned 16bit PCM
format at 44.1kHz.
.SH SEE ALSO
.BR dbcat (1),
.BR dbin (1),
.BR dbmixer (1),
.BR dbmix (7).
.SH AUTHOR
This manual page was written by Daniel Kobras <kobras@debian.org>,
for the Debian GNU/Linux system (but may be used by others).  It is heavily
based on DBMix's README file written by Robert Michael S Dean.