299 lines
9.0 KiB
Groff
299 lines
9.0 KiB
Groff
.\"
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.\" Copyright (c) 2003-2007 Yuriy Tsibizov
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 28, 2008
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.Dt SND_EMU10KX 4
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.Os
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.Sh NAME
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.Nm snd_emu10kx
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.Nd Creative SoundBlaster Live! and Audigy sound cards device driver
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.Sh SYNOPSIS
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To compile this driver into the kernel, place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device sound"
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.Cd "device snd_emu10kx"
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.Ed
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.Pp
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Alternatively, to load the driver as a module at boot time, place the
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following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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snd_emu10kx_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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bridge driver allows the generic audio driver
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.Xr sound 4
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to attach to Creative sound cards based on the EMU10K1, CA0100, CA0101, CA0102
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and CA0108 DSPs.
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.Pp
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The
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.Nm
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sound cards have a PCM part, which is accessible through one to five
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.Xr pcm 4
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devices (see
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.Sx MULTICHANNEL PLAYBACK
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for details), and MPU401-compatible MIDI I/O controller, which is accessible
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through the midi device.
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Wave table synthesizer support is not available.
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.Sh HARDWARE
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The
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.Nm
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driver supports the following sound cards:
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.Pp
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.Bl -bullet -compact
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.It
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Creative Sound Blaster Live!\& (EMU10K1 Chipset).
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Both PCM and MIDI interfaces are available.
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.It
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Creative Sound Blaster Audigy (CA0100 and CA0101 Chipset).
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PCM and two MIDI interfaces available.
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.It
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Creative Sound Blaster Audigy 2 and Creative Sound Blaster Audigy 4 (CA0102
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Chipset).
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PCM support is limited to 48kHz/16 bit stereo (192kHz/24 bit part
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of this chipset is not supported).
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.It
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Creative Sound Blaster Audigy 2 Value (CA0108 Chipset).
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PCM support is limited
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to 48kHz/16 bit stereo (192kHz/24 bit part of this chipset is not supported).
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There is no MIDI support for this card.
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.El
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.Pp
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The
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.Nm
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driver does
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.Em not
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support the following sound cards (although they have names
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similar to some supported ones):
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.Pp
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.Bl -bullet -compact
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.It
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Creative Sound Blaster Live!\& 24-Bit, identified by
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.Fx
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as
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.Qq Li "emu10k1x Soundblaster Live! 5.1" .
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.It
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Creative Sound Blaster Audigy LS / ES, identified by
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.Fx
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as
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.Qq Li "CA0106-DAT Audigy LS" .
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.It
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All other Creative sound cards with -DAT chipsets.
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.It
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All Creative X-Fi series sound cards.
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.El
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.Sh MULTICHANNEL PLAYBACK
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By default the
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.Nm
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driver is loaded with multichannel playback capabilities enabled.
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If you do not set the
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.Dv hint.emu10kx.0.multichannel_disabled
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option in your
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.Xr loader.conf 5
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configuration file you will get up to five DSP devices, one for each
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sound card output.
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You can use additional software (like
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.Em audio/pulseaudio
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from
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.Em The Ports Collection )
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to do sound stream demultiplexing.
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Only
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.Dq FRONT
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output can play and record sound from external
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sources (like line or S/PDIF inputs).
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.Sh MULTICHANNEL RECORDING
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By default multichannel recording capabilities are not enabled when you load
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the
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.Nm
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driver.
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If you enable the
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.Dv hint.emu10kx.0.multichannel_recording
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option in
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.Xr loader.conf 5
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you will get one more DSP device that is rate-locked to 48kHz/16bit/mono.
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This is actually 48kHz/16bit/32 channels on SB Live! cards and
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48kHz/16bit/64channels on Audigy cards, but the current implementation of
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the sound subsystem does not support such an amount of PCM channels.
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This device can not be opened for read, thus confusing many applications.
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.Pp
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Within a multichannel stream, the first half (0-15 or 0-31) is a copy of all DSP
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outputs, the second half (15-30 or 32-63) is a copy of some DSP inputs.
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On Live! cards the last substream (31) is used as a sync stream and is always
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set to 0xc0de.
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Audigy cards do not need such sync data, because a stream always starts with
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substream 0.
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.Ss SB Live! substream map (in byte offsets, each substream is 2 bytes LE)
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.Bl -tag -width ".Dv +0x00..+0x1E"
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.It Dv Offset
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Substream
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.It +0x00..+0x1E
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PCM streams 0..15
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.It +0x20, +0x22
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Empty
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.It +0x24..+0x2A
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PCM inputs: front left, front right, rear left, rear right, center, sub
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.It +0x2C..+0x3C
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DSP inputs 0..8:
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.It +0x3E
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sync substream (0xc0de)
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.El
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.Pp
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.Ss Audigy substream map (in byte offsets, each substream is 2 bytes LE)
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.Bl -tag -width ".Dv +0x00..+0x3E"
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.It Dv Offset
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Substream
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.It +0x00..+0x3E
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PCM streams 0..31
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.It +0x40..+0x5E
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PCM inputs: front LR, rear LR, center, sub, ...
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.It +0x60..+0x7E
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DSP inputs 0..16
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.El
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.Sh OSS MIXER CONTROLS
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These are the controls available through the standard OSS programming interface.
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You can use
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.Xr mixer 8
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to change them.
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.Pp
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On EMU10K1-based cards the OSS mixer directly controls the AC97 codec.
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On newer cards the OSS mixer controls some parameters of the AC97 codec and
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some DSP-based mixer controls.
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.Bl -inset
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.It Qq vol
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mixer control for the overall sound volume.
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.It Qq pcm
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mixer control for the PCM playback volume.
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It controls only front output
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volume in multichannel mode and all output volume in single channel mode.
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.It Qq rec
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mixer control acts very differently on EMU10K1 and other cards.
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On EMU10K1 cards it controls the AC97 codec recording level.
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On non-EMU10K1 cards it controls the amount of AC97
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.Dq stereo mix
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entering the DSP.
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AC97 recording level and AC97 recording source are fixed on CA0100, CA0101,
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CA0102 and CA0108 cards.
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The AC97 recording levels are always set to maximum and recording source is always
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.Dq Li "stereo mix" .
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.It Qq dig1
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is a CD S/PDIF (on-card) volume control
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.It Qq dig2
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is an AudigyDrive S/PDIF (Audigy series) or TOSLink (SB Live! series) volume
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control
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.It Qq dig3
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is an on-card S/PDIF volume control
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.It Qq line2
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is AudigyDrive "Line In 2" volume control
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.It Qq line3
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is AudigyDrive "AUX In 2" volume control
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.El
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.Pp
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Other OSS mixer controls control the inputs of the AC97 codec.
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.Sh PRIVATE DEVICE CONTROLS
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You can control some of EMU10Kx's operation and configuration parameters through
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.Va dev.emu10kx. Ns Aq Ar X
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sysctls.
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These
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.Xr sysctl 8
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values are temporary and should not be relied upon.
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.Sh DRIVER CONFIGURATION
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Loader tunables are used to set driver configuration.
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Tunables can be set at the
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.Xr loader 8
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prompt before booting the kernel or they can be stored in
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.Pa /boot/loader.conf .
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These tunables cannot be changed from a machine
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.Xr sysctl 8
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entry after boot, but you can change them using
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.Xr kenv 1
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before loading the
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.Nm
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driver.
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.Bl -tag -width indent
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.It Va hint.emu10kx. Ns Ao Ar X Ac Ns Va .disabled
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Disables loading a driver instance.
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.It Va hint.emu10kx. Ns Ao Ar X Ac Ns Va .multichannel_disabled
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Disables multichannel playback support, when one card is represented as
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several PCM devices.
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.It Va hint.emu10kx. Ns Ao Ar X Ac Ns Va .multichannel_recording
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Enables experimental multichannel recording support.
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.It Va hint.emu10kx. Ns Ao Ar X Ac Ns Va .debug
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Set debug output level.
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.Bl -tag -width 2n
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.It 0
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No additional debug options enabled
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.It 1
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Enables all DSP outputs to be connected, even those
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that are known to be unused on a particular card.
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.It 2
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Additional debug messages about in-driver events will be printed.
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.It 2
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Additional debug messages will be printed when memory allocation fails.
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.El
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.El
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.Sh FILES
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.Bl -tag -width ".Pa /dev/emu10kx?" -compact
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.It Pa /dev/emu10kx?
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.Nm
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management interface
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.El
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.Sh SEE ALSO
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.Xr sound 4
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 7.0 .
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.Sh AUTHORS
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.An -nosplit
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The PCM part of the driver is based on the
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.Xr snd_emu10k1 4
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SB Live!\& driver by
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.An "Cameron Grant" Aq cg@freebsd.org .
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The MIDI interface is based on the
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.Xr snd_emu10k1 4
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MIDI interface code by
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.An "Mathew Kanner" Aq matk@freebsd.org .
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The
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.Nm
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device driver and this manual page were written by
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.An Yuriy Tsibizov .
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.Sh BUGS
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.Pp
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The driver does not detect lost S/PDIF signals and produces noise when
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S/PDIF is not connected and S/PDIF volume is not zero.
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.Pp
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The PCM driver cannot detect the presence of Live!Drive or AudigyDrive
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breakout boxes and tries to use them (and list their connectors in the
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mixer).
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.Pp
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The MIDI driver cannot detect the presence of Live!Drive or AudigyDrive
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breakout boxes and tries to enable the IR receiver on them anyway.
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