adintool — a tool to record / split / send / receive audio streams


adintool {-in inputdev} {-out outputdev} [options...]


adintool analyzes speech input, finds speech segments skipping silence, and records the detected segments in various ways. It performs speech detection based on zerocross number and power (level), and records the detected parts to files or other output devices sucessively.

adintool is a upper version of adinrec with various functions. Supported input device are: microphone input, a speech file, standard tty input, and network socket (called adin-net server mode). Julius plugin can be also used. Detected speech segments will be saved to output devices: speech files, standard tty output, and network socket (called adin-net client mode). For example, you can split the incoming speech to segments and send them to Julius to be recognized.

Output format is WAV, 16bit (signed short), monoral. If the file already exist, it will be overridden.


All Julius options can be set. Only audio input related options are treated and others are silently skipped. Below is a list of options.

adintool specific options

-freq Hz

Set sampling rate in Hz. (default: 16,000)

-in inputdev

Audio input device. "mic" to capture via microphone input, "file" for audio file input, and "stdin" to read raw data from standard-input. For file input, file name prompt will appear after startup. Use "adinnet" to make adintool as "adinnet server", receiving data from client via network socket. Default port number is 5530, which can be altered by option "-inport".

Alternatively, input device can be set by "-input" option, in which case you can use plugin input.

-out outputdev

Audio output device store the data. Specify "file" to save to file, in which the output filename should be given by "-filename". Use "stdout" to standard out. "adinnet" will make adintool to be an adinnet client, sending speech data to a server via tcp/ip socket. When using "adinnet" output, the server name to send data should be specified by "-server". The default port number is 5530, which can be changed by "-port" option.

-inport num

When adintool becomes adinnet server to receive data (-in adinnet), set the port number to listen. (default: 5530)

-server [host] [,host...]

When output to adinnet server (-out adinnet), set the hostname. You can send to multiple hosts by specifying their hostnames as comma-delimited list like "host1,host2,host3".

-port [num] [,num...]

When adintool send a data to adinnet server (-out adinnet), set the port number to connect. (default: 5530) For multiple servers, specify port numbers for all servers like "5530,5530,5531".

-filename file

When output to file (-out file), set the output filename. The actual file name will be as "file.0000.wav" , "file.0001.wav" and so on, where the four digit number increases as speech segment detected. The initial number will be set to 0 by default, which can be changed by "-startid" option. When using "-oneshot" option to save only the first segment, the input will be saved as "file".

-startid number

At file output, set the initial file number. (default: 0)


Exit after the end of first speech segment.


Do not perform speech detection for input, just treat all the input as a single valid segment.


Output as RAW file (no header).


When output to adinnet server, adintool enter pause state at every end of speech segment. It will restart when the destination adinnet server sends it a resume signal.


When output to multiple adinnet server, not to do strict synchronization for restart. By default, when adintool has entered pause state, it will not restart until resume commands are received from all servers. This option will allow restart at least one restart command has arrived.

-rewind msec

When input is a live microphone device, and there has been some continuing input at the moment adintool resumes, it start recording backtracking by the specified milliseconds.

Concerning Julius options

-input {mic|rawfile|adinnet|stdin|netaudio|esd|alsa|oss}

Choose speech input source. Specify 'file' or 'rawfile' for waveform file. On file input, users will be prompted to enter the file name from stdin.

'mic' is to get audio input from a default live microphone device, and 'adinnet' means receiving waveform data via tcpip network from an adinnet client. 'netaudio' is from DatLink/NetAudio input, and 'stdin' means data input from standard input.

At Linux, you can choose API at run time by specifying alsa, oss and esd.

-lv thres

Level threshold for speech input detection. Values should be in range from 0 to 32767. (default: 2000)

-zc thres

Zero crossing threshold per second. Only input that goes over the level threshold (-lv) will be counted. (default: 60)

-headmargin msec

Silence margin at the start of speech segment in milliseconds. (default: 300)

-tailmargin msec

Silence margin at the end of speech segment in milliseconds. (default: 400)


This option enables DC offset removal.

-smpFreq Hz

Set sampling rate in Hz. (default: 16,000)


Record input with 48kHz sampling, and down-sample it to 16kHz on-the-fly. This option is valid for 16kHz model only. The down-sampling routine was ported from sptk. (Rev. 4.0)

-NA devicename

Host name for DatLink server input (-input netaudio).

-adport port_number

With -input adinnet, specify adinnet port number to listen. (default: 5530)


Julius by default removes successive zero samples in input speech data. This option stop it.

-C jconffile

Load a jconf file at here. The content of the jconffile will be expanded at this point.

-plugindir dirlist

Specify which directories to load plugin. If several direcotries exist, specify them by colon-separated list.



(using mic input with alsa device) specify a capture device name. If not specified, "default" will be used.


(using mic input with oss device) specify a capture device path. If not specified, "/dev/dsp" will be used.


(portaudio V19) specify the name of capture device to use. See the instruction output of log at start up how to specify it.


Try to set input latency of microphone input in milliseconds. Smaller value will shorten latency but sometimes make process unstable. Default value will depend on the running OS.


Record microphone input to files: "data.0000.wav", "data.0001.wav" and so on:

% adintool -in mic -out file -filename data

Split a long speech file "foobar.raw" into "foobar.1500.wav", "foobar.1501.wav" ...:

% adintool -in file -out file -filename foobar -startid 1500
% enter filename->foobar.raw

Copy an entire audio file via network socket.

(sender) % adintool -in file -out adinnet -server receiver_hostname -nosegment
(receiver) % adintool -in adinnet -out file -nosegment

Detect speech segment, send to Julius via network and recognize it:

(sender) % adintool -in mic -out adinnet -server receiver_hostname
(receiver) % julius -C ... -input adinnet


julius ( 1 ) , adinrec ( 1 )


Copyright (c) 1997-2000 Information-technology Promotion Agency, Japan

Copyright (c) 1991-2008 Kawahara Lab., Kyoto University

Copyright (c) 2000-2005 Shikano Lab., Nara Institute of Science and Technology

Copyright (c) 2005-2008 Julius project team, Nagoya Institute of Technology


The same as Julius.