Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

-D, --device=devicename

Select a PCM device by name.

-q Do not display messages.

-t, --file-type=type

Name the file type used. Files may be voc, wav, raw, or au.

-c, --channels=n

Use n channels: 1 for mono, 2 for stereo.

-f, --format=format

Specify the sample format. The sample formats available will

depend on hardware. For CD and DAT output, use the cd and

dat shortcuts, which set the sample rate, format, and channel

numbers all at once.

-r, --rate=n

Set the sample rate in Hertz.

-d, --duration=n

Set an interrupt for n seconds after playback begins.

-s, --sleep-min=n

aplaymidi

aplaymidi [options] [file]

Play MIDI files using the ALSA sound system; output is to ALSA

sequencer ports.

Options

-d, --delay=n

Delay n seconds at the end of a file to allow for reverberation

of the final notes.

-h Print help message, then exit.

-V Print version and quit.

-l List output ports available.

-p, --port=client:port

Specify the port to which the MIDI file will be sent. If no port

is specified, the file will be sent to port 0.

apm

apm [options]

Display current Advanced Power Management hardware informa-

tion, such as battery life, or send the system into standby or

suspend-to-disk mode. Used on older systems, and replaced by

acpi and related commands.

-V, --version

Display version information and ...