# pulsesink Source: [https://docs.qualcomm.com/doc/80-70014-50/topic/pulsesink.html](https://docs.qualcomm.com/doc/80-70014-50/topic/pulsesink.html) The pulsesink plugin interacts with the underlying PulseAudio sound server to play the PCM samples. The PulseAudio Server interacts with the underlying hardware to provide the playback capability and is based on [GstAudioBaseSink](https://gstreamer.freedesktop.org/documentation/audio/gstaudiobasesink.html#GstAudioBaseSink) base class. ## Inheritance chain [GObject](https://docs.gtk.org/gobject/) → [GstObject](https://gstreamer.freedesktop.org/documentation/gstreamer/gstobject.html?gi-language=c) → [GstElement](https://gstreamer.freedesktop.org/documentation/gstreamer/gstelement.html?gi-language=c) → [GstBaseSink](https://gstreamer.freedesktop.org/documentation/base/gstbasesink.html?gi-language=c#GstBaseSink)→ [GstAudioBaseSink](https://gstreamer.freedesktop.org/documentation/audio/gstaudiobasesink.html#GstAudioBaseSink) → GstPulseSink The following tables provide information on pad templates and element properties of pulsesink. For use cases, see [Audio (only) playback](https://docs.qualcomm.com/doc/80-70014-50/topic/audio-only-playback.html). ## Pad configuration | Pad Name | Capabilities | Capabilities | Capabilities | | --- | --- | --- | --- | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-raw | format: | { (string)S16LE, (string)S16BE, (string)F32LE, (string)F32BE,
(string)S32LE, (string)S32BE, (string)S24LE, (string)S24BE,
(string)S24\_32LE, (string)S24\_32BE, (string)U8 } | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-raw | layout: | interleaved | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-raw | rate: | [ 1, 22579200 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-raw | channels: | [ 1, 32 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-alaw | rate: | [ 1, 22579200 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-alaw | channels: | [ 1, 32 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-mulaw | rate: | [ 1, 22579200 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-mulaw | channels: | [ 1, 32 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-ac3 | framed: | true | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-eac3 | framed: | true | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-dts | framed: | true | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/x-dts | block-size: | { (int)512, (int)1024, (int)2048 } | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/mpeg | mpegversion: | 1 | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/mpeg | mpegaudioversion: | [ 1, 3 ] | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/mpeg | parsed: | true | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/mpeg | mpegversion: | { (int)2, (int)4 } | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/mpeg | framed: | true | | SINK template: 'sink'

*Availability:* Always

*Direction:* sink | audio/mpeg | stream-format: | adts | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ## Element configuration Table : Elements properties of pulsesink | Property | Description | | --- | --- | | name |

The name of the object

flags: readable, writable

String. Default: "pulsesink0"

| | parent |

The parent of the object

flags: readable, writable

Object of type "GstObject"

| | sync |

Sync on the clock

flags: readable, writable

Boolean. Default: true

| | max-lateness |

Maximum number of nanoseconds that a buffer can be late
before it is dropped (-1 unlimited)

flags: readable, writable

Integer64. Range: -1 - 9223372036854775807 Default: -1

| | qos |

Generate Quality-of-Service events upstream

flags: readable, writable

Boolean. Default: false

| | async |

Go asynchronously to PAUSED

flags: readable, writable

Boolean. Default: true

| | ts-offset |

Timestamp offset in nanoseconds

flags: readable, writable

Integer64. Range: -9223372036854775808 - 9223372036854775807
Default: 0

| | enable-last-sample |

Enable the last-sample property

flags: readable, writable

Boolean. Default: false

| | last-sample |

The last sample received in the sink

flags: readable

Boxed pointer of type "GstSample"

| | blocksize |

Size in bytes to pull per buffer (0 = default)

flags: readable, writable

Unsigned Integer. Range: 0 - 4294967295 Default: 4096

| | render-delay |

Additional render delay of the sink in nanoseconds

flags: readable, writable

Unsigned Integer64. Range: 0 - 18446744073709551615 Default:
0

| | throttle-time |

The time to keep between rendered buffers (0 =
disabled)

flags: readable, writable

Unsigned Integer64. Range: 0 - 18446744073709551615 Default:
0

| | max-bitrate |

The maximum bits per second to render (0 = disabled)

flags: readable, writable

Unsigned Integer64. Range: 0 - 18446744073709551615 Default:
0

| | buffer-time |

Size of audio buffer in microseconds, this is the minimum
latency that the sink reports

flags: readable, writable

Integer64. Range: 1 - 9223372036854775807 Default:
200000

| | latency-time |

The minimum amount of data to write in each iteration in
microseconds

flags: readable, writable

Integer64. Range: 1 - 9223372036854775807 Default:
10000

| | provide-clock |

Provide a clock to be used as the global pipeline clock

flags: readable, writable

Boolean. Default: true

| | slave-method |

Algorithm used to match the rate of the masterclock

flags: readable, writable

Enum "GstAudioBaseSinkSlaveMethod" Default: 1, "skew"

(0): resample - GST_AUDIO_BASE_SINK_SLAVE_RESAMPLE

(1): skew - GST_AUDIO_BASE_SINK_SLAVE_SKEW

(2): none - GST_AUDIO_BASE_SINK_SLAVE_NONE

(3): custom - GST_AUDIO_BASE_SINK_SLAVE_CUSTOM

| | can-activate-pull |

Allow pull-based scheduling

flags: readable, writable

Boolean. Default: false

| | alignment-threshold |

Timestamp alignment threshold in nanoseconds

flags: readable, writable

Unsigned Integer64. Range: 1 - 18446744073709551614 Default:
40000000

| | drift-tolerance |

Tolerance for clock drift in microseconds

flags: readable, writable

Integer64. Range: 1 - 9223372036854775807 Default:
40000

| | discont-wait |

Window of time in nanoseconds to wait before creating a
discontinuity

flags: readable, writable

Unsigned Integer64. Range: 0 - 18446744073709551614 Default:
1000000000

| | server |

The PulseAudio server to connect to

flags: readable, writable

String. Default: null

| | device |

The PulseAudio sink device to connect to

flags: readable, writable

String. Default: null

| | current-device |

The current PulseAudio sink device

flags: readable

String. Default: ""

| | device-name |

Human-readable name of the sound device

flags: readable

String. Default: null

| | volume |

Linear volume of this stream, 1.0=100%

flags: readable, writable

Double. Range: 0 - 10 Default: 1

| | mute |

Mute state of this stream

flags: readable, writable

Boolean. Default: false

| | client-name |

The PulseAudio client name to use

flags: readable, writable, changeable only in NULL or READY
state

String. Default: "gst-inspect-1.0"

| | stream-properties |

list of pulseaudio stream properties

flags: readable, writable

Boxed pointer of type "GstStructure"

| | stream-flags |

Stream flags to use (not all default flags can be
overridden)

flags: writable

Flags "GstPulseStreamFlags" Default: 0x0000200b, "Try to
adjust the latency of the sink/source based on the requested
buffer metrics and adjust buffer metrics accordingly+Timing
update requests are issued periodically
automatically+Interpolate the latency for this stream+Create
the stream corked"
- (0x00000000): Flag to pass when no specific options
  are needed - GST_PULSE_STREAM_NOFLAGS
- (0x00000001): Create the stream corked -
  GST_PULSE_STREAM_START_CORKED
- (0x00000002): Interpolate the latency for this
  stream - GST_PULSE_STREAM_INTERPOLATE_TIMING
- (0x00000004): Don't force the time to increase
  monotonically - GST_PULSE_STREAM_NOT_MONOTONIC
- (0x00000008): Timing update requests are issued
  periodically automatically -
  GST_PULSE_STREAM_AUTO_TIMING_UPDATE
- (0x00000010): Don't remap channels by their name,
  instead map them simply by their index -
  GST_PULSE_STREAM_NO_REMAP_CHANNELS
- (0x00000020): When remapping channels by name, don't
  upmix or downmix them to related channels -
  GST_PULSE_STREAM_NO_REMIX_CHANNELS
- (0x00000040): Use the sample format of the
  sink/device this stream is being connected to -
  GST_PULSE_STREAM_FIX_FORMAT
- (0x00000080): Use the sample rate of the sink -
  GST_PULSE_STREAM_FIX_RATE
- (0x00000100): Use the number of channels and the
  channel map of the sink -
  GST_PULSE_STREAM_FIX_CHANNELS
- (0x00000200): Don't allow moving of this stream to
  another sink/device -
  GST_PULSE_STREAM_DONT_MOVE
- (0x00000400): Allow dynamic changing of the sampling
  rate during playback -
  GST_PULSE_STREAM_VARIABLE_RATE
- (0x00000800): Find peaks instead of resampling -
  GST_PULSE_STREAM_PEAK_DETECT
- (0x00001000): Create in muted state -
  GST_PULSE_STREAM_START_MUTED
- (0x00002000): Try to adjust the latency of the
  sink/source based on the requested buffer metrics
  and adjust buffer metrics accordingly -
  GST_PULSE_STREAM_ADJUST_LATENCY
- (0x00004000): Enable compatibility mode for legacy
  clients that rely on a classic hardware device
  fragment-style playback model -
  GST_PULSE_STREAM_EARLY_REQUESTS
- (0x00008000): If set this stream won't be considered
  when it is checked whether the device this stream is
  connected to should auto-suspend -
  GST_PULSE_STREAM_DONT_INHIBIT_AUTO_SUSPEND
- (0x00010000): Create in unmuted state -
  GST_PULSE_STREAM_START_UNMUTED
- (0x00020000): If the sink/source this stream is
  connected to is suspended during the creation of
  this stream, cause it to fail -
  GST_PULSE_STREAM_FAIL_ON_SUSPEND
- (0x00040000): If a volume is passed when this stream
  is created, creation of this stream, cause it to
  fail - GST_PULSE_STREAM_RELATIVE_VOLUME
- (0x00080000): Used to tag content that will be
  rendered by passthrough sinks -
  GST_PULSE_STREAM_PASSTHROUGH Write only

| | prebuf |

Prebuf to be set with sink-input

flags: writable

Integer. Range: -1 - 2147483647 Default: 0 Write only

| **Parent Topic:** [Qualcomm GST plugins](https://docs.qualcomm.com/doc/80-70014-50/topic/qim-sdk-plugins.html) Last Published: Oct 27, 2025 [Previous Topic pulsesrc](https://docs.qualcomm.com/bundle/publicresource/80-70014-50/topics/pulsesrc.md) [Next Topic qtivcomposer](https://docs.qualcomm.com/bundle/publicresource/80-70014-50/topics/qtivcomposer.md)