ecatools - audio processing utils based on ecasound
ecaconvert .extension file1 [ file2 ... fileN ]
ecafixdc file1 [ file2 ... fileN ]
ecalength file1 [ file2 ... fileN ]
ecanormalize file1 [ file2 ... fileN ]
ecaplay [-dfhklopq] [ file1 file2 ... fileN ]
ecasignalview [ 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 batch processing.
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 .ext.
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 "ecamonitor
To enable inbound connections, ecasound has to be started with the
--daemon 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 the library.
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
option can 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
If not otherwise specified, ecaplay will use the audio output device
specified in ~/.ecasound/ecasoundrc for playback. A different output
device can be selected with ECAPLAY_OUTPUT_DEVICE shell environment
variable or with the -o:output_device command-line option.
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
Set libecasound debug level. See ecasound(1).
-f Flush the playlist contents. See also options -l, -p and -q.
-h Print usage information and exit.
Skip 'number' of files.
-l List the current playlist contents to stdout. See also options
-f, -p and -q.
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
-p Play tracks in the playlist (in looped mode). See also options
-f, -l and -q.
-q 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:
input 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'.
output Similarly to input, second option not starting with a '-' is
interpreted as output. Defaults to 'null'.
Buffersize in sample frames. Defaults to 128.
-c Enable cumulative mode. Counters are not reseted after refresh.
-d Enable debug mode.
Specify default audio format. See ecasound(1) for details.
Specify screen refresh rate in milliseconds.
-I Use linear scale for showing audio sample amplitude.
-L 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 interface control):
Reset statistics (max-peak, avg-amplitude and clipped samples
q or Q or Esc
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://www.eca.cx/ecasound ->
ECASOUND Path to the ecasound executable. Used by many ecatools.
ECAPLAY_OUTPUT_DEVICE Device ecaplay should use for audio output. Same
syntax as for ecaplay/ecasound "-o" option.
~/.ecasound/ecasoundrc The default ecasound resource file. See
ecasoundrc(5) for details.
~/.ecasound/ecaplay_queue 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-