Add keepSilence option, release 1.4.0

CHANGELOG.md

@@ -1,44 +1,48 @@
 # Changelog
 
+## 1.4.0 (2018-12-27)
+### Added
++ `keepSilence` option added fo `sox` and `rec` only. The option enables or disabled the `-l` flag which controls whether the silence is part of the recording or not.
+
 ## 1.3.0-beta.0 (2018-12-12)
 ### Added
-- Opened up the `format` argument of the audio recorder options. (only for `arecord`)
++ Opened up the `format` argument of the audio recorder options. (only for `arecord`)
 ### Changed
-- Fixed `arecord` command generation.
++ Fixed `arecord` command generation.
 
 ## 1.2.0 (2018-11-09)
 ### Changed
-- Added `-l` to silence effect, therefore the silence not removed from the start of the recording.
-- Default values of `thresholdStart` and `thresholdStop` are both set to `1`.
-- Fixed duration of silence effect since duration parameters need to have a decimal. For example `2.0` instead of `2`.
++ Added `-l` to silence effect, therefore the silence not removed from the start of the recording.
++ Default values of `thresholdStart` and `thresholdStop` are both set to `1`.
++ Fixed duration of silence effect since duration parameters need to have a decimal. For example `2.0` instead of `2`.
 ### Removed
-- `sampleRate` and `threshold` options removed.
++ `sampleRate` and `threshold` options removed.
 
 ## 1.1.6 (2018-11-08)
 ### Added
-- Example added to examples directory, and changed `example.js` to `examples/print-command.js`.
++ Example added to examples directory, and changed `example.js` to `examples/print-command.js`.
 ### Fixed
-- Fixed silence effect.
++ Fixed silence effect.
 
 ## 1.1.5 (2018-10-24)
 ### Added
-- Added `bits`, `encoding`, `rate`, and `type` properties to options, which allows greater control over output.
++ Added `bits`, `encoding`, `rate`, and `type` properties to options, which allows greater control over output.
 ### Changed
-- `sampleRate` option renamed to `rate`, legacy support still available.
++ `sampleRate` option renamed to `rate`, legacy support still available.
 
 ## 1.1.4 (2018-10-23)
 ### Added
-- Tests added with continues integration and code coverage.
++ Tests added with continues integration and code coverage.
 ### Changed
-- Clarified examples in `README.md`.
++ Clarified examples in `README.md`.
 ### Fixed
-- `example.js` fixed.
-- Default values fixed in `README.md`.
++ `example.js` fixed.
++ Default values fixed in `README.md`.
 
 ## 1.1.3 (2018-09-18)
 ### Added
-- `CHANGELOG.md` added.
-- `eslint` module added as dev dependency
-- `.eslintrc.json` file added.
++ `CHANGELOG.md` added.
++ `eslint` module added as dev dependency
++ `.eslintrc.json` file added.
 ### Changed
-- Restructured project files.
++ Restructured project files.

README.md

@@ -56,6 +56,7 @@ const options = {
   silence: 2,         // Duration of silence in seconds before it stops recording.
   thresholdStart: 0.5,  // Silence threshold to start recording.
   thresholdStop: 0.5,   // Silence threshold to stop recording.
+  keepSilence: true   // Keep the silence in the recording.
 };
 // Optional parameter intended for debugging.
 // The object has to implement a log and warn function.

library/index.js

@@ -30,6 +30,7 @@ class AudioRecorder extends require(`events`).EventEmitter {
 			silence: 2,					// Duration of silence in seconds before it stops recording.
 			thresholdStart: 0.5,		// Silence threshold to start recording.
 			thresholdStop: 0.5,			// Silence threshold to stop recording.
+			keepSilence: true			// Keep the silence in the recording.
 		}, options);
 		this.logger = logger;
 
@@ -82,12 +83,21 @@ class AudioRecorder extends require(`events`).EventEmitter {
 				);
 
 				if (this.options.silence) {
-					// Stop recording after duration has passed below threshold.
 					this.command.arguments.push(
 						// Effect
-						`silence`,
-						// Keep silence in results
-						`-l`,
+						`silence`
+					);
+
+					// Keep the silence of the recording.
+					if (this.options.keepSilence) {
+						this.command.arguments.push(
+							// Keep silence in results
+							`-l`,
+						);
+					}
+
+					// Stop recording after duration has passed below threshold.
+					this.command.arguments.push(
 						// Enable above-periods
 						`1`,
 						// Duration