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<h1>sfxr.lua</h1>
<h2>Contents</h2>
<ul>
<li><a href="#Functions">Functions</a></li>
<li><a href="#Tables">Tables</a></li>
<li><a href="#Fields">Fields</a></li>
<li><a href="#Class_Sound">Class Sound </a></li>
</ul>
<h2>API</h2>
<ul class="$(kind=='Topics' and '' or 'nowrap'">
<li><strong>sfxr</strong></li>
</ul>
</div>
<div id="content">
<h1>Module <code>sfxr</code></h1>
<p>A port of the sfxr sound effect synthesizer to Lua</p>
<p>
</p>
<h2><a href="#Functions">Functions</a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#newSound">newSound (...)</a></td>
<td class="summary">The constructor for the Sound class.</td>
</tr>
</table>
<h2><a href="#Tables">Tables</a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#WAVEFORM">WAVEFORM</a></td>
<td class="summary">Wave form constants</td>
</tr>
<tr>
<td class="name" nowrap><a href="#SAMPLERATE">SAMPLERATE</a></td>
<td class="summary">Sample rate constants
(use the number values directly, these are just for lookup)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#BITDEPTH">BITDEPTH</a></td>
<td class="summary">Bit depth constants
(use the number values directly, these are just for lookup)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#ENDIANNESS">ENDIANNESS</a></td>
<td class="summary">Endianness constants</td>
</tr>
</table>
<h2><a href="#Fields">Fields</a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#VERSION">VERSION</a></td>
<td class="summary">The module version (SemVer)</td>
</tr>
</table>
<h2><a href="#Class_Sound">Class Sound </a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:__init">sfxr.Sound:__init ()</a></td>
<td class="summary">Initialize the Sound instance.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.volume.master">self.volume.master</a></td>
<td class="summary">Master volume (<em>default</em> 0.5)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.volume.sound">self.volume.sound</a></td>
<td class="summary">Additional gain (<em>default</em> 0.5)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:resetParameters">sfxr.Sound:resetParameters ()</a></td>
<td class="summary">Set all parameters to their default values.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.repeatspeed">self.repeatspeed</a></td>
<td class="summary">Repeat speed:
Times to repeat the frequency slide over the course of the envelope
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.waveform">self.waveform</a></td>
<td class="summary">(<a href="index.html#WAVEFORM"><em>WAVEFORM</em></a>) The base wave form</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.envelope.attack">self.envelope.attack</a></td>
<td class="summary">Attack time:
Time the sound takes to reach its peak volume
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.envelope.sustain">self.envelope.sustain</a></td>
<td class="summary">Sustain time:
Time the sound sustains on its peak volume
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.envelope.punch">self.envelope.punch</a></td>
<td class="summary">Sustain punch:
Amount by which the sound peak volume is increased at the start of the
sustain time
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.envelope.decay">self.envelope.decay</a></td>
<td class="summary">Decay time:
Time the sound takes to decay after its sustain time
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.frequency.start">self.frequency.start</a></td>
<td class="summary">Start frequency:
Base tone of the sound, before sliding
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.frequency.min">self.frequency.min</a></td>
<td class="summary">Min frequency:
Tone below which the sound will get cut off
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.frequency.slide">self.frequency.slide</a></td>
<td class="summary">Slide:
Amount by which the frequency is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.frequency.dslide">self.frequency.dslide</a></td>
<td class="summary">Delta slide:
Amount by which the slide is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.vibrato.depth">self.vibrato.depth</a></td>
<td class="summary">Vibrato depth:
Amount of vibrato-like amplitude (volume) modulation
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.vibrato.speed">self.vibrato.speed</a></td>
<td class="summary">Vibrato speed:
Oscillation speed of the vibrato
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.vibrato.delay">self.vibrato.delay</a></td>
<td class="summary">Vibrato delay:
Unused and unimplemented
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.change.amount">self.change.amount</a></td>
<td class="summary">Change amount:
Amount by which the frequency is changed mid-sound
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.change.speed">self.change.speed</a></td>
<td class="summary">Change speed:
Time before the frequency change happens
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.duty.ratio">self.duty.ratio</a></td>
<td class="summary">Square duty:
Width of the square wave pulse cycle (doesn't affect other wave forms)
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.duty.sweep">self.duty.sweep</a></td>
<td class="summary">Duty sweep:
Amount by which the square duty is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.phaser.offset">self.phaser.offset</a></td>
<td class="summary">Phaser offset:
Amount by which the phaser signal is offset from the sound
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.phaser.sweep">self.phaser.sweep</a></td>
<td class="summary">Phaser sweep:
Amount by which the phaser offset is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.lowpass.cutoff">self.lowpass.cutoff</a></td>
<td class="summary">Lowpass filter cutoff:
Lower bound for frequencies allowed to pass through this filter
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.lowpass.sweep">self.lowpass.sweep</a></td>
<td class="summary">Lowpass filter cutoff sweep:
Amount by which the LP filter cutoff is increased or decreased
through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.lowpass.resonance">self.lowpass.resonance</a></td>
<td class="summary">Lowpass filter resonance:
Amount by which certain resonant frequencies near the cutoff are
increased
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.highpass.cutoff">self.highpass.cutoff</a></td>
<td class="summary">Highpass filter cutoff:
Upper bound for frequencies allowed to pass through this filter
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#self.highpass.sweep">self.highpass.sweep</a></td>
<td class="summary">Highpass filter cutoff sweep:
Amount by which the HP filter cutoff is increased or decreased
through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:sanitizeParameters">sfxr.Sound:sanitizeParameters ()</a></td>
<td class="summary">Clamp all parameters within sane ranges.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:generate">sfxr.Sound:generate ([rate=44100[, depth=0]])</a></td>
<td class="summary">Generate the sound and yield the sample data.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:getEnvelopeLimit">sfxr.Sound:getEnvelopeLimit ([rate=44100])</a></td>
<td class="summary">Get the maximum sample limit allowed by the current envelope.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:generateTable">sfxr.Sound:generateTable ([rate=44100[, depth=0[, tab]]])</a></td>
<td class="summary">Generate the sound into a table.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:generateString">sfxr.Sound:generateString ([rate=44100[, depth=16[, endianness=0]]])</a></td>
<td class="summary">Generate the sound to a binary string.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:generateSoundData">sfxr.Sound:generateSoundData ([rate=44100[, depth=0[, a]]])</a></td>
<td class="summary">Synthesize the sound to a LÖVE SoundData instance.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomize">sfxr.Sound:randomize ([seed])</a></td>
<td class="summary">Randomize all sound parameters</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:mutate">sfxr.Sound:mutate ([by=1][, seed], whether)</a></td>
<td class="summary">Mutate all sound parameters</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomPickup">sfxr.Sound:randomPickup ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate an item pick up sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomLaser">sfxr.Sound:randomLaser ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate a laser sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomExplosion">sfxr.Sound:randomExplosion ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate an explosion sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomPowerup">sfxr.Sound:randomPowerup ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate a power up sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomHit">sfxr.Sound:randomHit ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate a hit sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomJump">sfxr.Sound:randomJump ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate a jump sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:randomBlip">sfxr.Sound:randomBlip ([seed])</a></td>
<td class="summary">Randomize all sound parameters to generate a blip sound</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:exportWAV">sfxr.Sound:exportWAV (f[, rate=44100[, depth=0]])</a></td>
<td class="summary">Generate and export the audio data to a PCM WAVE file.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:save">sfxr.Sound:save (f[, to=true])</a></td>
<td class="summary">Save the sound parameters to a file as a Lua table</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:load">sfxr.Sound:load (f)</a></td>
<td class="summary">Load the sound parameters from a file containing a Lua table</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:saveBinary">sfxr.Sound:saveBinary (f)</a></td>
<td class="summary">Save the sound parameters to a file in the sfxr binary format</td>
</tr>
<tr>
<td class="name" nowrap><a href="#sfxr.Sound:loadBinary">sfxr.Sound:loadBinary (f)</a></td>
<td class="summary">Load the sound parameters from a file in the sfxr binary format</td>
</tr>
</table>
<br/>
<br/>
<h2 class="section-header "><a name="Functions"></a>Functions</h2>
<dl class="function">
<dt>
<a name = "newSound"></a>
<strong>newSound (...)</strong>
</dt>
<dd>
The constructor for the Sound class.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">...</span>
</li>
</ul>
<h3>Returns:</h3>
<ol>
<span class="types"><a class="type" href="index.html#Sound">Sound</a></span>
a Sound instance
</ol>
</dd>
</dl>
<h2 class="section-header "><a name="Tables"></a>Tables</h2>
<dl class="function">
<dt>
<a name = "WAVEFORM"></a>
<strong>WAVEFORM</strong>
</dt>
<dd>
Wave form constants
<h3>Fields:</h3>
<ul>
<li><span class="parameter">SQUARE</span>
square wave (<code>= 0</code>)
</li>
<li><span class="parameter">SAW</span>
saw wave (<code>= 1</code>)
</li>
<li><span class="parameter">SINE</span>
sine wave (<code>= 2</code>)
</li>
<li><span class="parameter">NOISE</span>
white noise (<code>= 3</code>)
</li>
</ul>
</dd>
<dt>
<a name = "SAMPLERATE"></a>
<strong>SAMPLERATE</strong>
</dt>
<dd>
Sample rate constants
(use the number values directly, these are just for lookup)
<h3>Fields:</h3>
<ul>
<li><span class="parameter">22050</span>
22.05 kHz (<code>= 22050</code>)
</li>
<li><span class="parameter">44100</span>
44.1 kHz (<code>= 44100</code>)
</li>
</ul>
</dd>
<dt>
<a name = "BITDEPTH"></a>
<strong>BITDEPTH</strong>
</dt>
<dd>
Bit depth constants
(use the number values directly, these are just for lookup)
<h3>Fields:</h3>
<ul>
<li><span class="parameter">0</span>
floating point bit depth, -1 to 1 (<code>= 0</code>)
</li>
<li><span class="parameter">8</span>
unsigned 8 bit, 0x00 to 0xFF (<code>= 8</code>)
</li>
<li><span class="parameter">16</span>
unsigned 16 bit, 0x0000 to 0xFFFF (<code>= 16</code>)
</li>
</ul>
</dd>
<dt>
<a name = "ENDIANNESS"></a>
<strong>ENDIANNESS</strong>
</dt>
<dd>
Endianness constants
<h3>Fields:</h3>
<ul>
<li><span class="parameter">LITTLE</span>
little endian (<code>= 0</code>)
</li>
<li><span class="parameter">BIG</span>
big endian (<code>= 1</code>)
</li>
</ul>
</dd>
</dl>
<h2 class="section-header "><a name="Fields"></a>Fields</h2>
<dl class="function">
<dt>
<a name = "VERSION"></a>
<strong>VERSION</strong>
</dt>
<dd>
The module version (SemVer)
</dd>
</dl>
<h2 class="section-header has-description"><a name="Class_Sound"></a>Class Sound </h2>
<div class="section-description">
The main Sound class.
</div>
<dl class="function">
<dt>
<a name = "sfxr.Sound:__init"></a>
<strong>sfxr.Sound:__init ()</strong>
</dt>
<dd>
Initialize the Sound instance.
Called by <a href="index.html#newSound">the constructor</a>.
</dd>
<dt>
<a name = "self.volume.master"></a>
<strong>self.volume.master</strong>
</dt>
<dd>
Master volume (<em>default</em> 0.5)
</dd>
<dt>
<a name = "self.volume.sound"></a>
<strong>self.volume.sound</strong>
</dt>
<dd>
Additional gain (<em>default</em> 0.5)
</dd>
<dt>
<a name = "sfxr.Sound:resetParameters"></a>
<strong>sfxr.Sound:resetParameters ()</strong>
</dt>
<dd>
Set all parameters to their default values.
Called by <a href="index.html#sfxr.Sound:__init">the initializer</a>.
</dd>
<dt>
<a name = "self.repeatspeed"></a>
<strong>self.repeatspeed</strong>
</dt>
<dd>
Repeat speed:
Times to repeat the frequency slide over the course of the envelope
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.waveform"></a>
<strong>self.waveform</strong>
</dt>
<dd>
(<a href="index.html#WAVEFORM"><em>WAVEFORM</em></a>) The base wave form
</dd>
<dt>
<a name = "self.envelope.attack"></a>
<strong>self.envelope.attack</strong>
</dt>
<dd>
Attack time:
Time the sound takes to reach its peak volume
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.envelope.sustain"></a>
<strong>self.envelope.sustain</strong>
</dt>
<dd>
Sustain time:
Time the sound sustains on its peak volume
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.envelope.punch"></a>
<strong>self.envelope.punch</strong>
</dt>
<dd>
Sustain punch:
Amount by which the sound peak volume is increased at the start of the
sustain time
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.envelope.decay"></a>
<strong>self.envelope.decay</strong>
</dt>
<dd>
Decay time:
Time the sound takes to decay after its sustain time
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.frequency.start"></a>
<strong>self.frequency.start</strong>
</dt>
<dd>
Start frequency:
Base tone of the sound, before sliding
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.frequency.min"></a>
<strong>self.frequency.min</strong>
</dt>
<dd>
Min frequency:
Tone below which the sound will get cut off
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.frequency.slide"></a>
<strong>self.frequency.slide</strong>
</dt>
<dd>
Slide:
Amount by which the frequency is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.frequency.dslide"></a>
<strong>self.frequency.dslide</strong>
</dt>
<dd>
Delta slide:
Amount by which the slide is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.vibrato.depth"></a>
<strong>self.vibrato.depth</strong>
</dt>
<dd>
Vibrato depth:
Amount of vibrato-like amplitude (volume) modulation
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.vibrato.speed"></a>
<strong>self.vibrato.speed</strong>
</dt>
<dd>
Vibrato speed:
Oscillation speed of the vibrato
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.vibrato.delay"></a>
<strong>self.vibrato.delay</strong>
</dt>
<dd>
Vibrato delay:
Unused and unimplemented
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.change.amount"></a>
<strong>self.change.amount</strong>
</dt>
<dd>
Change amount:
Amount by which the frequency is changed mid-sound
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.change.speed"></a>
<strong>self.change.speed</strong>
</dt>
<dd>
Change speed:
Time before the frequency change happens
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.duty.ratio"></a>
<strong>self.duty.ratio</strong>
</dt>
<dd>
Square duty:
Width of the square wave pulse cycle (doesn't affect other wave forms)
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.duty.sweep"></a>
<strong>self.duty.sweep</strong>
</dt>
<dd>
Duty sweep:
Amount by which the square duty is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.phaser.offset"></a>
<strong>self.phaser.offset</strong>
</dt>
<dd>
Phaser offset:
Amount by which the phaser signal is offset from the sound
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.phaser.sweep"></a>
<strong>self.phaser.sweep</strong>
</dt>
<dd>
Phaser sweep:
Amount by which the phaser offset is increased or decreased through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.lowpass.cutoff"></a>
<strong>self.lowpass.cutoff</strong>
</dt>
<dd>
Lowpass filter cutoff:
Lower bound for frequencies allowed to pass through this filter
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.lowpass.sweep"></a>
<strong>self.lowpass.sweep</strong>
</dt>
<dd>
Lowpass filter cutoff sweep:
Amount by which the LP filter cutoff is increased or decreased
through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.lowpass.resonance"></a>
<strong>self.lowpass.resonance</strong>
</dt>
<dd>
Lowpass filter resonance:
Amount by which certain resonant frequencies near the cutoff are
increased
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.highpass.cutoff"></a>
<strong>self.highpass.cutoff</strong>
</dt>
<dd>
Highpass filter cutoff:
Upper bound for frequencies allowed to pass through this filter
(<em>default</em> 0.0, <em>min</em> 0.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "self.highpass.sweep"></a>
<strong>self.highpass.sweep</strong>
</dt>
<dd>
Highpass filter cutoff sweep:
Amount by which the HP filter cutoff is increased or decreased
through time
(<em>default</em> 0.0, <em>min</em> -1.0, <em>max</em> 1.0)
</dd>
<dt>
<a name = "sfxr.Sound:sanitizeParameters"></a>
<strong>sfxr.Sound:sanitizeParameters ()</strong>
</dt>
<dd>
Clamp all parameters within sane ranges.
</dd>
<dt>
<a name = "sfxr.Sound:generate"></a>
<strong>sfxr.Sound:generate ([rate=44100[, depth=0]])</strong>
</dt>
<dd>
Generate the sound and yield the sample data.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">rate</span>
<span class="types"><a class="type" href="index.html#SAMPLERATE">SAMPLERATE</a></span>
the sample rate
(<em>default</em> 44100)
</li>
<li><span class="parameter">depth</span>
<span class="types"><a class="type" href="index.html#BITDEPTH">BITDEPTH</a></span>
the bit depth
(<em>default</em> 0)
</li>
</ul>
<h3>Returns:</h3>
<ol>
<span class="types"><span class="type">function()</span></span>
a generator that yields the sample data when called
</ol>
<h3>Usage:</h3>
<ul>
<pre class="example"> <span class="keyword">for</span> s <span class="keyword">in</span> sound:generate(<span class="number">44100</span>, <span class="number">0</span>) <span class="keyword">do</span>
<span class="comment">-- do something with s
</span> <span class="keyword">end</span></pre>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:getEnvelopeLimit"></a>
<strong>sfxr.Sound:getEnvelopeLimit ([rate=44100])</strong>
</dt>
<dd>
Get the maximum sample limit allowed by the current envelope.
Does not take any other limits into account, so the returned count might be
higher than samples actually generated. Still useful though.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">rate</span>
<span class="types"><a class="type" href="index.html#SAMPLERATE">SAMPLERATE</a></span>
the sample rate
(<em>default</em> 44100)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:generateTable"></a>
<strong>sfxr.Sound:generateTable ([rate=44100[, depth=0[, tab]]])</strong>
</dt>
<dd>
Generate the sound into a table.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">rate</span>
<span class="types"><a class="type" href="index.html#SAMPLERATE">SAMPLERATE</a></span>
the sample rate
(<em>default</em> 44100)
</li>
<li><span class="parameter">depth</span>
<span class="types"><a class="type" href="index.html#BITDEPTH">BITDEPTH</a></span>
the bit depth
(<em>default</em> 0)
</li>
<li><span class="parameter">tab</span>
<span class="types"><span class="type">{}</span></span>
the table to synthesize into
(<em>optional</em>)
</li>
</ul>
<h3>Returns:</h3>
<ol>
<li>
<span class="types"><span class="type">{number,...}</span></span>
the table filled with sample data</li>
<li>
<span class="types"><span class="type">int</span></span>
the number of written samples (== #tab)</li>
</ol>
</dd>
<dt>
<a name = "sfxr.Sound:generateString"></a>
<strong>sfxr.Sound:generateString ([rate=44100[, depth=16[, endianness=0]]])</strong>
</dt>
<dd>
Generate the sound to a binary string.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">rate</span>
<span class="types"><a class="type" href="index.html#SAMPLERATE">SAMPLERATE</a></span>
the sample rate
(<em>default</em> 44100)
</li>
<li><span class="parameter">depth</span>
<span class="types"><a class="type" href="index.html#BITDEPTH">BITDEPTH</a></span>
the bit depth (may not be <a href="index.html#BITDEPTH">0</a>)
(<em>default</em> 16)
</li>
<li><span class="parameter">endianness</span>
<span class="types"><a class="type" href="index.html#ENDIANNESS">ENDIANNESS</a></span>
the endianness (ignored when depth == 8)
(<em>default</em> 0)
</li>
</ul>
<h3>Returns:</h3>
<ol>
<li>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
a binary string of sample data</li>
<li>
<span class="types"><span class="type">int</span></span>
the number of written samples</li>
</ol>
</dd>
<dt>
<a name = "sfxr.Sound:generateSoundData"></a>
<strong>sfxr.Sound:generateSoundData ([rate=44100[, depth=0[, a]]])</strong>
</dt>
<dd>
Synthesize the sound to a LÖVE SoundData instance.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">rate</span>
<span class="types"><a class="type" href="index.html#SAMPLERATE">SAMPLERATE</a></span>
the sample rate
(<em>default</em> 44100)
</li>
<li><span class="parameter">depth</span>
<span class="types"><a class="type" href="index.html#BITDEPTH">BITDEPTH</a></span>
the bit depth
(<em>default</em> 0)
</li>
<li><span class="parameter">a</span>
<span class="types"><span class="type">love.sound.SoundData</span></span>
SoundData instance (will be created if
not passed)
(<em>optional</em>)
</li>
</ul>
<h3>Returns:</h3>
<ol>
<li>
<span class="types"><span class="type">love.sound.SoundData</span></span>
a SoundData instance</li>
<li>
<span class="types"><span class="type">int</span></span>
the number of written samples</li>
</ol>
</dd>
<dt>
<a name = "sfxr.Sound:randomize"></a>
<strong>sfxr.Sound:randomize ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:mutate"></a>
<strong>sfxr.Sound:mutate ([by=1][, seed], whether)</strong>
</dt>
<dd>
Mutate all sound parameters
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">by</span>
<span class="types"><a class="type" href="index.html#self.change.amount">amount</a></span>
how much to mutate the parameters
(<em>default</em> 1)
</li>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
<li><span class="parameter">whether</span>
<span class="types"><span class="type">bool</span></span>
to change the frequency parameters
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomPickup"></a>
<strong>sfxr.Sound:randomPickup ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate an item pick up sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomLaser"></a>
<strong>sfxr.Sound:randomLaser ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate a laser sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomExplosion"></a>
<strong>sfxr.Sound:randomExplosion ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate an explosion sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomPowerup"></a>
<strong>sfxr.Sound:randomPowerup ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate a power up sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomHit"></a>
<strong>sfxr.Sound:randomHit ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate a hit sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomJump"></a>
<strong>sfxr.Sound:randomJump ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate a jump sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:randomBlip"></a>
<strong>sfxr.Sound:randomBlip ([seed])</strong>
</dt>
<dd>
Randomize all sound parameters to generate a blip sound
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">seed</span>
<span class="types"><span class="type">number</span></span>
a random seed
(<em>optional</em>)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:exportWAV"></a>
<strong>sfxr.Sound:exportWAV (f[, rate=44100[, depth=0]])</strong>
</dt>
<dd>
Generate and export the audio data to a PCM WAVE file.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">f</span>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a>, <span class="type">file</span> or <span class="type">love.filesystem.File</span></span>
a file path, a Lua file object, a love.filesystem.File instance
</li>
<li><span class="parameter">rate</span>
<span class="types"><a class="type" href="index.html#SAMPLERATE">SAMPLERATE</a></span>
the sample rate
(<em>default</em> 44100)
</li>
<li><span class="parameter">depth</span>
<span class="types"><a class="type" href="index.html#BITDEPTH">BITDEPTH</a></span>
the bit depth
(<em>default</em> 0)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:save"></a>
<strong>sfxr.Sound:save (f[, to=true])</strong>
</dt>
<dd>
Save the sound parameters to a file as a Lua table
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">f</span>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a>, <span class="type">file</span> or <span class="type">love.filesystem.File</span></span>
a file path, a Lua file object, a love.filesystem.File instance
</li>
<li><span class="parameter">to</span>
<span class="types"><span class="type">whether</span></span>
minify the output
(<em>default</em> true)
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:load"></a>
<strong>sfxr.Sound:load (f)</strong>
</dt>
<dd>
Load the sound parameters from a file containing a Lua table
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">f</span>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a>, <span class="type">file</span> or <span class="type">love.filesystem.File</span></span>
a file path, a Lua file object, a love.filesystem.File instance
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:saveBinary"></a>
<strong>sfxr.Sound:saveBinary (f)</strong>
</dt>
<dd>
Save the sound parameters to a file in the sfxr binary format
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">f</span>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a>, <span class="type">file</span> or <span class="type">love.filesystem.File</span></span>
a file path, a Lua file object, a love.filesystem.File instance
</li>
</ul>
</dd>
<dt>
<a name = "sfxr.Sound:loadBinary"></a>
<strong>sfxr.Sound:loadBinary (f)</strong>
</dt>
<dd>
Load the sound parameters from a file in the sfxr binary format
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">f</span>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a>, <span class="type">file</span> or <span class="type">love.filesystem.File</span></span>
a file path, a Lua file object, a love.filesystem.File instance
</li>
</ul>
</dd>
</dl>
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<i style="float:right;">Last updated 2016-03-02 00:35:01 </i>
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