# pulsesink Source: [https://docs.qualcomm.com/doc/80-70018-50/topic/pulsesink.html](https://docs.qualcomm.com/doc/80-70018-50/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. It's based on the [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/80-70018-50/topic/audio-use-cases.html#audio-only-playback). ## 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's dropped (-1 unlimited).

flags: readable, writable

Integer64. Range: ˗1to 9223372036854775807, default: ˗1

| | qos | Generate wuality-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 to
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 primary clock.

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 for connection.

flags: readable, writable

String. Default: null

| | device | The PulseAudio sink device for connection.

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.

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

String. Default: "gst-inspect-1.0"

| | stream-properties | The list of PulseAudio stream properties.

flags: readable, writable

Boxed pointer of type "GstStructure"

| | stream-flags | The stream flags to use (not all default flags can be
overridden).

flags: writable

Flags "GstPulseStreamFlags" Default: 0x0000200b

Adjust the latency of the sink/source based on the requested
buffer metrics and adjust buffer metrics accordingly. The
timing update requests are issued periodically
automatically. Interpolate the latency for this stream and
create the corked stream.
- (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 and automatically -
  GST_PULSE_STREAM_AUTO_TIMING_UPDATE
- (0x00000010): Don't remap channels by their name,
  instead map them 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 to which the stream being connected -
  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): 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 the 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 isn't considered
  when the device this stream is connected to
  auto-suspends -
  GST_PULSE_STREAM_DONT_INHIBIT_AUTO_SUSPEND
- (0x00010000): Create in unmuted state -
  GST_PULSE_STREAM_START_UNMUTED
- (0x00020000): If the sink/source connected to this
  stream is suspended during the creation of the
  stream, it cause it to fail -
  GST_PULSE_STREAM_FAIL_ON_SUSPEND
- (0x00040000): If volume is passed when this stream
  is created, creation of this stream fails -
  GST_PULSE_STREAM_RELATIVE_VOLUME
- (0x00080000): Used to tag content that are rendered
  by passthrough sinks - GST_PULSE_STREAM_PASSTHROUGH
  Write only

| | prebuf | Prebuf to be set with sink-input.

flags: writable

Integer. Range: ˗1 to 2147483647, default: 0 write-only

| **Parent Topic:** [Configure audio plugins](https://docs.qualcomm.com/doc/80-70018-50/topic/audio-plugins.html) Last Published: Jan 30, 2026 [Previous Topic pulsesrc](https://docs.qualcomm.com/bundle/publicresource/80-70018-50/topics/pulsesrc.md) [Next Topic Configure ML plugins](https://docs.qualcomm.com/bundle/publicresource/80-70018-50/topics/inferencing-plugins.md)