# SPDX-License-Identifier: GPL-2.0-only config SND_MPU401_UART tristate select SND_RAWMIDI config SND_OPL3_LIB tristate select SND_TIMER select SND_HWDEP select SND_SEQ_DEVICE if SND_SEQUENCER != n config SND_OPL4_LIB tristate select SND_TIMER select SND_HWDEP select SND_SEQ_DEVICE if SND_SEQUENCER != n # select SEQ stuff to min(SND_SEQUENCER,SND_XXX) config SND_OPL3_LIB_SEQ def_tristate SND_SEQUENCER && SND_OPL3_LIB select SND_SEQ_MIDI_EMUL select SND_SEQ_MIDI_EVENT config SND_OPL4_LIB_SEQ def_tristate SND_SEQUENCER && SND_OPL4_LIB select SND_SEQ_MIDI_EMUL select SND_SEQ_MIDI_EVENT config SND_VX_LIB tristate select FW_LOADER select SND_HWDEP select SND_PCM config SND_AC97_CODEC tristate select SND_PCM select AC97_BUS select SND_VMASTER menuconfig SND_DRIVERS bool "Generic sound devices" default y help Support for generic sound devices. if SND_DRIVERS config SND_PCSP tristate "PC-Speaker support (READ HELP!)" depends on PCSPKR_PLATFORM && X86 && HIGH_RES_TIMERS depends on INPUT select SND_PCM help If you don't have a sound card in your computer, you can include a driver for the PC speaker which allows it to act like a primitive sound card. This driver also replaces the pcspkr driver for beeps. You can compile this as a module which will be called snd-pcsp. WARNING: if you already have a soundcard, enabling this driver may lead to a problem. Namely, it may get loaded before the other sound driver of yours, making the pc-speaker a default sound device. Which is likely not what you want. To make this driver play nicely with other sound driver, you can add this in a configuration file under /etc/modprobe.d/ directory: options snd-pcsp index=2 You don't need this driver if you only want your pc-speaker to beep. You don't need this driver if you have a tablet piezo beeper in your PC instead of the real speaker. Say N if you have a sound card. Say M if you don't. Say Y only if you really know what you do. config SND_DUMMY tristate "Dummy (/dev/null) soundcard" select SND_PCM help Say Y here to include the dummy driver. This driver does nothing, but emulates various mixer controls and PCM devices. You don't need this unless you're testing the hardware support of programs using the ALSA API. To compile this driver as a module, choose M here: the module will be called snd-dummy. config SND_ALOOP tristate "Generic loopback driver (PCM)" select SND_PCM select SND_TIMER help Say 'Y' or 'M' to include support for the PCM loopback device. This module returns played samples back to the user space using the standard ALSA PCM device. The devices are routed 0->1 and 1->0, where first number is the playback PCM device and second number is the capture device. Module creates two PCM devices and configured number of substreams (see the pcm_substreams module parameter). The loopback device allows time synchronization with an external timing source using the time shift universal control (+-20% of system time). To compile this driver as a module, choose M here: the module will be called snd-aloop. config SND_PCMTEST tristate "Virtual PCM test driver" depends on DEBUG_FS select SND_PCM help Say 'Y' or 'M' to include support for the Virtual PCM test driver. This driver is aimed at extended testing of the userspace applications which use the ALSA API, as well as the PCM middle layer testing. It can generate random or pattern-based data into the capture stream, check the playback stream for containing the selected pattern, inject time delays during capture/playback, redefine the RESET ioctl operation to perform the PCM middle layer testing and inject errors during the PCM callbacks. It supports both interleaved and non-interleaved access modes. You can find the corresponding selftest in the 'alsa' selftests folder. config SND_VIRMIDI tristate "Virtual MIDI soundcard" depends on SND_SEQUENCER select SND_TIMER select SND_RAWMIDI select SND_SEQ_VIRMIDI select SND_SEQ_MIDI_EVENT help Say Y here to include the virtual MIDI driver. This driver allows to connect applications using raw MIDI devices to sequencer clients. If you don't know what MIDI is, say N here. To compile this driver as a module, choose M here: the module will be called snd-virmidi. config SND_MTPAV tristate "MOTU MidiTimePiece AV multiport MIDI" depends on HAS_IOPORT select SND_RAWMIDI help To use a MOTU MidiTimePiece AV multiport MIDI adapter connected to the parallel port, say Y here and make sure that the standard parallel port driver isn't used for the port. To compile this driver as a module, choose M here: the module will be called snd-mtpav. config SND_MTS64 tristate "ESI Miditerminal 4140 driver" depends on PARPORT select SND_RAWMIDI help The ESI Miditerminal 4140 is a 4 In 4 Out MIDI Interface with additional SMPTE Timecode capabilities for the parallel port. Say 'Y' to include support for this device. To compile this driver as a module, chose 'M' here: the module will be called snd-mts64. config SND_SERIAL_U16550 tristate "UART16550 serial MIDI driver" depends on HAS_IOPORT select SND_RAWMIDI help To include support for MIDI serial port interfaces, say Y here and read <file:Documentation/sound/cards/serial-u16550.rst>. This driver works with serial UARTs 16550 and better. This driver accesses the serial port hardware directly, so make sure that the standard serial driver isn't used or deactivated with setserial before loading this driver. To compile this driver as a module, choose M here: the module will be called snd-serial-u16550. config SND_SERIAL_GENERIC tristate "Generic serial MIDI driver" depends on SERIAL_DEV_BUS depends on OF select SND_RAWMIDI help To include support for mapping generic serial devices as raw ALSA MIDI devices, say Y here. The driver only supports setting the serial port to standard baudrates. To attain the standard MIDI baudrate of 31.25 kBaud, configure the clock of the underlying serial device so that a requested 38.4 kBaud will result in the standard speed. Use this devicetree binding to configure serial port mapping <file:Documentation/devicetree/bindings/sound/serial-midi.yaml> To compile this driver as a module, choose M here: the module will be called snd-serial-generic. config SND_MPU401 tristate "Generic MPU-401 UART driver" depends on HAS_IOPORT select SND_MPU401_UART help Say Y here to include support for MIDI ports compatible with the Roland MPU-401 interface in UART mode. To compile this driver as a module, choose M here: the module will be called snd-mpu401. config SND_PORTMAN2X4 tristate "Portman 2x4 driver" depends on PARPORT select SND_RAWMIDI help Say Y here to include support for Midiman Portman 2x4 parallel port MIDI device. To compile this driver as a module, choose M here: the module will be called snd-portman2x4. config SND_AC97_POWER_SAVE bool "AC97 Power-Saving Mode" depends on SND_AC97_CODEC default n help Say Y here to enable the aggressive power-saving support of AC97 codecs. In this mode, the power-mode is dynamically controlled at each open/close. The mode is activated by passing 'power_save=X' to the snd-ac97-codec driver module, where 'X' is the time-out value, a nonnegative integer that specifies how many seconds of idle time the driver must count before it may put the AC97 into power-save mode; a value of 0 (zero) disables the use of this power-save mode. After the snd-ac97-codec driver module has been loaded, the 'power_save' parameter can be set via sysfs as follows: echo 10 > /sys/module/snd_ac97_codec/parameters/power_save In this case, the time-out is set to 10 seconds; setting the time-out to 1 second (the minimum activation value) isn't recommended because many applications try to reopen the device frequently. A value of 10 seconds would be a good choice for normal operations. See Documentation/sound/designs/powersave.rst for more details. config SND_AC97_POWER_SAVE_DEFAULT int "Default time-out for AC97 power-save mode" depends on SND_AC97_POWER_SAVE default 0 help The default time-out value in seconds for AC97 automatic power-save mode. 0 means to disable the power-save mode. See SND_AC97_POWER_SAVE for more details. endif # SND_DRIVERS