PCMPlayer

WLJS

Wolfram Kernel

Execution environment

Supports dynamics

Notebook`Editor`Kernel`PCMAudio`

Context

wljs-sound

Package

PCMPlayer[data_List | _Offload, type_String, opts___]

creates a static or dynamic sound emitter. The following data types are supported

• "SignedInteger32"
• "SignedInteger16"
• "SignedInteger8"

where data is 1D list of numerical data or Offload ed symbol with numerical data.

Or also it can also play a regular Audio object

PCMPlayer[a_Audio]

Options

SampleRate

The default is 44100

"AutoPlay"

The default is True

"Event"

An uid of event to be fired, when a buffer is about to end. It can be used to feed new data to a player aka streaming.

"TimeAhead"

The time is milliseconds, which is offset from the end of the sound buffer and used to fire "Event"

Dynamics

Use Offload to feed on data argument to a player in realtime.

Streaming

The simples example with streaming will look like this

music = Import[...];

(* extract R channel *)
data = AudioData[music, "SignedInteger16"] // First;
buffer = {};

index = 1;
EventHandler["bufferEnds", {"More" -> Function[Null,
  index += 100000;
  If[index > Length[data], Print["End"]; Return[]];
  
  buffer  = data[[index ;; Min[index + 100000 - 1, Length[data]]]]
], "Stop" -> Function[Null,
	index = 1;
]}];

PCMPlayer[buffer // Offload, "SignedInteger16", "Event"->"bufferEnds"]