ecatools - audio processing utils based on ecasound
.extension file1 [ file2 ... fileN ]
file1 [ file2 ... fileN ]
file1 [ file2 ... fileN ]
file1 [ file2 ... fileN ]
[-dfhklopq] [ file1 file2 ... fileN ]
[ options ] [ input ] [ output ]
Ecatools are simple command line utils for audio file processing. Each tool is
designed to perform one specific operation. Most of the tools also support
A tool for converting a set of files to a common target format. This target
format is given as the first command line argument, and its syntax is
A simple command-line tool for fixing DC-offset.
See the separate ecalength(1) man page.
Ecamonitor is a util program that can be used to monitor an active ecasound
session. Ecamonitor is able to show information about the current chainsetup
such as list of inputs, outputs, current position, effects, the engine status
and numerous other things.
By default ecamonitor will try to connect to IP4 address "localhost",
to port "2868". A different address can be specified when starting
ecamonitor, for example "ecamonitor foo.mynetwork.com" or
To enable inbound connections, ecasound has to be started with the
option. Ecamonitor is implemented in Python using the NetECI
Ecanormalize is a command-line tool for normalizing audio files to utilize the
full available sample resolution. Ecanormalize first finds out how much the
input file can be amplified without clipping and if there is room for
increase, a static gain will be applied to the file.
Ecaplay is a command-line tool for playing audio files. Ecaplay uses the
libecasound engine and is thus able to handle all audio formats supported by
Files can be selected for playback either by specifying the filenames on the
command-line, or by using the playlist mechanism. In playlist mode, files can
be added to the playlist using the -q
option. The -p
then be used to play all tracks on the playlist. Ecaplay will repeat the
playlist tracks until explicitly stopped (with double Ctrl-C). Playlist can be
flushed with -f
and its contents listed with -l
If not otherwise specified, ecaplay will use the audio output device specified
for playback. A different output device can
be selected with ECAPLAY_OUTPUT_DEVICE
shell environment variable or
with the -o:output_device
Playback can be stopped at any time with Ctrl-C. If multiple files are played,
first Ctrl-C will stop the current file and move on to play the next one.
Issuing Ctrl-C twice (within one second), will cause ecaplay to exit.
- Set libecasound debug level. See ecasound(1).
- Flush the playlist contents. See also options -l, -p and -q.
- Print usage information and exit.
- Skip ’number’ of files.
- List the current playlist contents to stdout. See also options -f, -p
- Use ’output_device’ instead of the default output device (as
specified in ~/.ecasound/ecasoundrc). Syntax is same as used by
"-o" ecasound option (see ecasound(1) man page). This option
overrides the ECAPLAY_OUTPUT_DEVICE environment variable (more info
- Play tracks in the playlist (in looped mode). See also options -f, -l
- Queue new tracks to the playlist. All filenames given on the command-line
will be added to the the playlist. It is possible to queue new tracks
while another instance of ecaplay is using the playlist. See also options
-f, -l and -p.
Ecasignalview is meant for monitoring signal amplitude and peak statistics. It
accepts the following options:
- The first option not starting with a ’-’ is interpreted as
an input string. This can be a device or a filename. All formats supported
by libecasound are accepted. Defaults to ’/dev/dsp’.
- Similarly to input, second option not starting with a ’-’ is
interpreted as output. Defaults to ’null’.
- Buffersize in sample frames. Defaults to 128.
- Enable cumulative mode. Counters are not reseted after refresh.
- Enable debug mode.
- Specify default audio format. See ecasound(1) for details.
- Specify screen refresh rate in milliseconds.
- Use linear scale for showing audio sample amplitude.
- Use logarithmic scale for showing audio sample amplitude.
- -G, -B, -M*, -r, -z
- Ecasound options use to modify the engine behaviour, see ecasound(1)
manpage for details.
- When ecasignalview is running, the following keyboard commands can be used
to control the operation (requires system support for UNIX terminal
- Reset statistics (max-peak, avg-amplitude and clipped samples count).
- q or Q or Esc
- Quit ecasignalview.
- It is also possible to reset the max-peak and clipped-samples counters by
sending a SIGHUP signal to the process (i.e. from another console:
"killall -v -HUP ecasignalview").
More complete documentation for ecasignalview can be found from "Ecasound
User’s Guide" (see ’’http://nosignal.fi/ecasound
Path to the ecasound executable. Used by many ecatools.
Device ecaplay should use for audio output. Same
syntax as for ecaplay/ecasound "-o" option.
The default ecasound resource file. See
ecasoundrc(5) for details.
File used to store the ecaplay playlist (one
track per line with full path).
ecasound (1), ecalength(1), "HTML docs in the Documentation
Kai Vehmanen, <kvehmanen -at- eca -dot- cx <kvehmanen -at- eca -dot-