PAD(4) | Device Drivers Manual | PAD(4)

# NAME

`pad` —
Pseudo audio device driver

# SYNOPSIS

`pseudo-device pad`
`audio* at audiobus?`

# DESCRIPTION

`pad` is a pseudo-device driver which provides support for feeding back PCM data from consumers of an audio(4) device to userland.

The raw PCM data readable from /dev/padN is encoded in stereo little-endian 16-bit linear PCM at 44100 Hz.

# FILES

The `pad` pseudo-device driver receives data from /dev/audioN and feeds the raw PCM output to /dev/padN. /dev/audioN is created once /dev/padN is opened.

- /dev/audioN
- /dev/padN

# EXAMPLES

The following example streams an MP3 to an Apple AirTunes compatible device:

    $ rtunes - < /dev/pad0 &
    $ mpg123 -a /dev/audio1 mozart.mp3

Record the output of an application (in this case, audioplay):

    $ ffmpeg -f s16le -ar 44100 -ac 2 -i /dev/pad0 output.wav
    $ audioplay -d /dev/audio1 input.wav

# SEE ALSO

audio(4)

# HISTORY

The `pad` driver appeared in NetBSD 5.0.

# AUTHORS

Jared D. McNeill <jmcneill@invisible.ca>

February 6, 2021 | NetBSD 9.2