---
name: "jack-stdout"
section: "1"
platform: "linux"
package: "jack-stdio"
version: "1.6-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/jack-stdout"
---

# jack-stdout(1)

write JACK audio data to stdout

## NAME

jack-stdout - write JACK audio data to stdout

## SYNOPSIS

**jack-stdout** \[*OPTIONS*\] port1 \[ port2 ...\]

## DESCRIPTION

**jack-stdout** captures audio from JACK and writes  raw data to standard-output.

The number of given ports detemine the number of audio channels that are used. If more than one channel is given, the audio-sample data will be interleaved.

## OPTIONS

- **-b**, **--bitdepth** *BITS*

  Specify the bit-depth of each sample. For integer-encoding this can be 16 or 24.  The default is 16. This setting is only used for integer encoding: Floating-point samples will always be 32 bit wide.

- **-d**, **--duration** *SEC*

  Specify the time for which jack-stdout should run in seconds. A value less than 1 means to run indefinitely. The default is 0.

- **-e**, **--encoding** *FORMAT*

  Set the output format of the data: signed-integer, unsigned-integer, floating-point (default: signed)

- **-n**, **--name** *CLIENTNAME*

  Set JACK client name (default: jstdout)

- **-h**, **--help**

  Print a brief usage information

- **-L**, **--little-endian**

  Write little-endian data or native-byte-order float (this is the default)

- **-B**, **--big-endian**

  Output big-endian data or swap the byte-order of floating-point

- **-q**, **--quiet**

  Inhibit usual output. This affects information and buffer-overflow warnings but not setup-errors.

- **-S**, **--bufsize** *SAMPLES*

  Choose the internal buffer-size in samples. The default size is 65536. The given value will be multiplied by the number of channels and bit-depth to get the size of the ring-buffer.

## EXAMPLES

```
  jack-stdout xmms_0:out_1 xmms_0:out_2 \
  | mono  ~/Desktop/Downloads/JustePort.exe - 10.0.1.6 0
  jack-stdout -b 24 -e unsigned -B system:capture_1 system:capture_2 \
  | sox -t raw -r 48k -e unsigned -b 24 -B -c 2 - /tmp/recording.wav
  jack-stdout system:capture_1 system:capture_2 \
  | oggenc -r -R 48000 -B 16 -C 2 - \
  > /tmp/recording.ogg
  jack-stdout system:capture_1 \
  | oggenc -r -R 48000 -B 16 -C 1 - \
  | oggfwd -p -n "my live stream" localhost 5900 hackme live.ogg
```

## AUTHOR

Robin Gareus \<robin@gareus.org\>.

## SEE ALSO

http://jackaudio.org/,