SpeechSynthesisUtterance.pitch - Web APIs
some speech synthesis engines or voices may constrain the minimum and maximum rates further. if ssml is used, this value will be overridden by prosody tags in the markup. ...
...some speech synthesis engines or voices may constrain the minimum and maximum rates further. if ssml is used, this value will be overridden by prosody tags in the markup. ...
...some speech synthesis engines or voices may constrain the minimum and maximum rates further. if ssml is used, this value will be overridden by prosody tags in the markup. ...
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Movement, orientation, and motion: A WebXR example - Web APIs
umber of degrees of rotation to apply around the x axis per second. yrotationdegreespersecond the number of degrees to rotate around the y axis each second. zrotationdegreespersecond the number of degrees per second to rotate around the z axis. enablerotation a boolean indicating whether or not to enable the rotation of the cube at all. allowmouserotation if true, you can use the mouse to pitch and yaw the view angle. allowkeyboardmotion if true, the w, a, s, and d keys move the viewer forward, left, backward, and to the right, while the up and down arrow keys move up and down. if false, only xr device changes to the view are permitted. enableforcepolyfill if this boolean is true, the example will attempt to use the webxr polyfill even if the browser actually has support for webxr. ...
...ill even if the browser actually has support for webxr. if false, the polyfill is only used if the browser doesn't implement navigator.xr. session_type the type of xr session to create: inline for an inline session presented in the context of the document and immersive-vr to present the scene to an immersive vr headset. mouse_speed a multiplier used to scale the inputs from the mouse used for pitch and yaw control. move_distance the distance to move in response to any of the keys used to move the viewer through the scene. note: this example always displays what it renders on the screen, even if using immersive-vr mode. this lets you compare any differences in rendering between the two modes, and lets you see output from immersive mode even if you don't have a headset. setup and utili...
... const viewerstartposition = vec3.fromvalues(0, 0, -10); const viewerstartorientation = vec3.fromvalues(0, 0, 1.0); const cubeorientation = vec3.create(); const cubematrix = mat4.create(); const mousematrix = mat4.create(); const inverseorientation = quat.create(); const ...
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Using the Web Speech API - Web APIs
text to be synthesised (known as utterances), voices to be used for the utterance, etc. again, most oses have some kind of speech synthesis system, which will be used by the api for this task as available. demo to show simple usage of web speech synthesis, we've provided a demo called speak easy synthesis. this includes a set of form controls for entering text to be synthesised, and setting the pitch, rate, and voice to use when the text is uttered. after you have entered your text, you can press enter/return to hear it spoken. to run the demo, you can clone (or directly download) the github repo it is part of, open the html index file in a supporting desktop browser, or navigate to the live demo url in a supporting mobile browser like chrome, or firefox os. browser support support for w...
...n.) <h1>speech synthesiser</h1> <p>enter some text in the input below and press return to hear it. change voices using the dropdown menu.</p> <form> <input type="text" class="txt"> <div> <label for="rate">rate</label><input type="range" min="0.5" max="2" value="1" step="0.1" id="rate"> <div class="rate-value">1</div> <div class="clearfix"></div> </div> <div> <label for="pitch">pitch</label><input type="range" min="0" max="2" value="1" step="0.1" id="pitch"> <div class="pitch-value">1</div> <div class="clearfix"></div> </div> <select> </select> </form> javascript let's investigate the javascript that powers this app. setting variables first of all, we capture references to all the dom elements involved in the ui, but more interestingly, we capture a ...
... in the ui, but more interestingly, we capture a reference to window.speechsynthesis. this is api's entry point — it returns an instance of speechsynthesis, the controller interface for web speech synthesis. var synth = window.speechsynthesis; var inputform = document.queryselector('form'); var inputtxt = document.queryselector('.txt'); var voiceselect = document.queryselector('select'); var pitch = document.queryselector('#pitch'); var pitchvalue = document.queryselector('.pitch-value'); var rate = document.queryselector('#rate'); var ratevalue = document.queryselector('.rate-value'); var voices = []; populating the select element to populate the <select> element with the different voice options the device has available, we've written a populatevoicelist() function. we first invoke sp...
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XRReferenceSpace.getOffsetReferenceSpace() - Web APIs
treferencespace(). then, when drawing the scene, you can use the offset reference space to not only position objects relative to one another, but to apply the needed transforms to render objects properly based upon the viewer's position. this is demonstrated in the example implementing rotation based on non-xr inputs, which demonstrates a way to use this method to let the user use their mouse to pitch and yaw their viewing angle. syntax offsetreferencespace = xrreferencespace.getoffsetreferencespace(originoffset); parameters originoffset an xrrigidtransform specifying the offset to the origin of the new reference space. these values are added to the position and orientation of the current reference space and then the result is used as the position and orientation of the newly created xr...
...t() on those events. this prevents the right-clicks from causing the context menu from appearing in the browser. ...
... context menu from appearing in the browser. canvas.oncontextmenu = (event) => { event.preventdefault(); }; canvas.addeventlistener("mousemove", (event) => { if (event.buttons & 2) { rotateviewby(event.movementx, event.movementy); } }); next, the rotateviewby() function, which updates the mouse look direction's yaw and pitch based on the mouse delta values from the mousemove event. ...
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SpeechSynthesis - Web APIs
isutterance instance containing the text from the text <input>, set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the speechsynthesis.speak() method. ...
...he text from the text <input>, set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the speechsynthesis.speak() method. ...
...the text <input>, set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the speechsynthesis.speak() method. ...
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Index - Web APIs
ll pannernodes spatialize in relation to the audiolistener stored in the baseaudiocontext.listener attribute. 143 audiolistener.dopplerfactor api, audio, audiolistener, deprecated, doppler, doppler effect, property, reference, web audio api, dopplerfactor, effects the deprecated dopplerfactor property of the audiolistener interface is a double value representing the amount of pitch shift to use when rendering a doppler effect. 144 audiolistener.forwardx api, audio, audiolistener, property, reference, web audio api, forwardx the forwardx read-only property of the audiolistener interface is an audioparam representing the x value of the direction vector defining the forward direction the listener is pointing in. 145 audiolistener.forwardy ap...
...terance instance that the event was triggered on. 4110 speechsynthesisutterance api, experimental, interface, reference, speechsynthesisutterance, web speech api, speech, synthesis the speechsynthesisutterance interface of the web speech api represents a speech request. it contains the content the speech service should read and information about how to read it (e.g. language, pitch and volume.) 4111 speechsynthesisutterance.speechsynthesisutterance() api, constructor, reference, speechsynthesisutterance, web speech api, speech, synthesis the speechsynthesisutterance() constructor of the speechsynthesisutterance interface returns a new speechsynthesisutterance object instance. 4112 speechsynthesisutterance.lang api, experimental, property,...
... 4121 speechsynthesisutterance.rate api, experimental, property, reference, speechsynthesisutterance, web speech api, rate, speech, synthesis...
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Viewpoints and viewers: Simulating cameras in WebXR - Web APIs
ary we've used previously, this can be performed using the rotatey() method on the mat4 class, which represents a standard 4x4 matrix. to rotate the viewpoint defined by the matrix viewmatrix by panangle radians: mat4.rotatey(viewmatrix, viewmatrix, panangle); if panangle is positive, this transform will pan the camera to the right; a negative value for panangle will pan to the left. tilting (pitching up or down) when you tilt or pitch the camera, you keep it fixed in space at the same coordinates while changing the direction in which it's facing vertically without altering the horizontal portion of its facing at all. it simply adjusts the direction it's pointing up and down. tilting is good for capturing the scope of a tall object or scene, such as a forest or a mountain, but is also a po...
...staldistance, dollydistance]); this will shift the origin of the matrix viewmatrix by the specified amount along each axis. rotating around multiple axes you can also combine rotations around multiple axes into a single rotation around a quaternion representing a shared axis for the rotations. ...
...ix viewmatrix by the specified amount along each axis. rotating around multiple axes you can also combine rotations around multiple axes into a single rotation around a quaternion representing a shared axis for the rotations. ...
... mat4.rotatex(viewmatrix, viewmatrix, pitchangle); mat4.rotatey(viewmatrix, viewmatrix, yawangle); mat4.rotatez(viewmatrix, viewmatrix, rollangle); you can instead construct a quaternion representing a combined rotation axis from the euler angles, then rotate the matrix using multiplication, like this: const axisquat = quat.create(); const rotatematrix = mat4.create(); quat.fromeuler(axisquat, pitchangle, yawangle, rollangle); mat4.fromquat(rotatematrix, axisquat); mat4.multiply(viewmatrix, viewmatrix, rotatematrix); this converts the euler angles for pitch, yaw, and roll into a quaternion representing all three rotations. this is then converted into a rotation transform matrix; then, finally, the view matrix is multiplied by the rotation transform to complete the rotations. representing 3...

XRView - Web APIs
e space for that object which applies a transform that encapsulates the desired changes. ...
...ransform() function returns the transform needed to move and rotate an object whose current situation is described by the reference space refspace to a new position and orientation which is computed using previously recorded mouse and keyboard input data which has generated offsets for yaw, pitch, and position along all three axes. ...
...tation which is computed using previously recorded mouse and keyboard input data which has generated offsets for yaw, pitch, and position along all three axes. function applymousemovement(refspace) { if (!mouseyaw && !mousepitch && !axialdistance && !transversedistance && !verticaldistance) { return refspace; } // compute the quaternion used to rotate the image based // on the pitch and yaw. quat.identity(inverseorientation); quat.rotatex(inverseorientation, inverseorientation, -mousepitch); quat.rotatey(inverseorientation, inverseorientation, -mouseyaw); // compute the true "up" vector for our object. vec3.cross(vecx, vecy, cubeorientation); vec3.cross(vecy, cubeorientation, vecx); // now compute the transform that teleports the object to the // specifie...
...ematrix, newtransform.matrix); // create a new reference space that transforms the object to the new // position and orientation, returning the new reference space. return refspace.getoffsetreferencespace(newtransform); } this code is broken into four sections. in the first, the quaternion inverseorientation is computed. this represents the rotation of the object given the values of mousepitch (rotation around the object's reference's space's x axis) and mouseyaw (rotation around the object's y axis). the second section computes the "up" vector for the object. this vector indicates the direction which is "up" in the scene overall, but in the object's reference space. the third section creates the new xrrigidtransform, specifying a point providing the offsets along the three axes as t...

AudioListener - Web APIs
ds audiolistener.setorientation() sets the orientation of the listener. audiolistener.setposition() sets the position of the listener. note: although these methods are deprecated they are currently the only way to set the orientation and position in firefox, internet explorer and safari. ...
...t of pitch shift to use when rendering a doppler effect. audiolistener.speedofsound is a double value representing the speed of sound, in meters per second. in a previous version of the specification, the dopplerfactor and speedofsound properties and the setposition() method could be used to control the doppler effect applied to audiobuffersourcenodes connected downstream — these would be pitched up and down according to the relative speed of the pannernode and the audiolistener. these features had a number of problems: only audiobuffersourcenodes were pitched up or down, not other source nodes. the behavior to adopt when an audiobuffersourcenode was connected to multiple pannernodes was unclear. ...
... because of these issues, these properties and methods have been removed. the setorientation() and setposition() methods have been replaced by setting their property value equivilents. for example setposition(x, y, z) can be achieved by setting positionx.value, positiony.value, and positionz.value respectively. ...

Digital audio concepts - Web media technologies
. the farther the air molecules move with each pulse of the wave, the higher the amplitude of the wave, and the louder the sound is. the faster the molecules vibrate, the higher the frequency of the wave. the higher the amplitude (height) of the wave, the louder the sound is at that instant. the shorter the wavelength (the closer together the crests of the wave are), the higher the frequency (or pitch) of the sound that's produced. computers, however, are digital. in order to represent a sound wave in a way computers can manipulate and work with (let alone transmit over a network), the sound has to be converted into a digital form. this process is called analog to digital conversion (a/d for short). the first factor affecting the fidelity of the captured audio is the audio bandwidth; that ...
...solution audio. not commonly used yet, but this will change over time. there is a reason why 44.1 khz is considered the minimum "high fidelity" sampling rate. the nyquist-shannon sampling theorem dictates that to reproduce a sound accurately, it must be sampled at twice the rate of the sound's frequency. since the range of human hearing is from around 20 hz to 20,000 hz, reproducing the highest-pitched sounds people can generally hear requires a sample rate of more than 40,000 hz. to provide additional room for a low-pass filter in order to avoid distortion caused by aliasing, an additional 2.05 khz transition band is added to the pre-sampling frequency (resulting in 22,050 hz). doubling that per the nyquist theorem results in a final minimum frequency of (you guessed it) 44.1 khz. high-res...
...hz, though the exact range varies from person to person due to factors including gender). in addition, the vast majority of human speech sounds tend to lie between 500 hz and 3,000 hz or so, making it possible to drop substantial portions of the overall waveform without compromising the listener's ability to understand the words being said. you can even adjust the audio bandwidth to factor in the pitch of the individual speaker's voice. because of all these factors, and because speech waveforms are typically less complex than music, high (and more specifically "high enough") fidelity reproduction of speech can be achieved at a relatively low bit rate. when a compression algorithm designed to compress general audio analyzes an audio waveform, it can discard anything outside the range of human ...

Browser Feature Detection - Archive of obsolete content
ewidth true false true overflow true true true page true false true pagebreakafter true true true pagebreakbefore true true true pagebreakinside true false true pause true false true pauseafter true false true pausebefore true false true pitch true false false pitchrange true false true playduring false false false position true true true quotes true false true richness true false false right true true true size true false true speak true false true speakheader true fals...
...outlinewidth', 'supported': false}, {name: 'overflow', 'supported': false}, {name: 'page', 'supported': false}, {name: 'pagebreakafter', 'supported': false}, {name: 'pagebreakbefore', 'supported': false}, {name: 'pagebreakinside', 'supported': false}, {name: 'pause', 'supported': false}, {name: 'pauseafter', 'supported': false}, {name: 'pausebefore', 'supported': false}, {name: 'pitch', 'supported': false}, {name: 'pitchrange', 'supported': false}, {name: 'playduring', 'supported': false}, {name: 'position', 'supported': false}, {name: 'quotes', 'supported': false}, {name: 'richness', 'supported': false}, {name: 'right', 'supported': false}, {name: 'size', 'supported': false}, {name: 'speak', 'supported': false}, {name: 'speakheader', 'supported': false}, {...

AudioListener.dopplerFactor - Web APIs
the value is 1 by default. example in the following example, you can see an example of how the createpanner() method, audiolistener and pannernode would be used to control audio spatialisation. ...
...the value is 1 by default. example in the following example, you can see an example of how the createpanner() method, audiolistener and pannernode would be used to control audio spatialisation. ...

<frequency> - CSS: Cascading Style Sheets
it is not currently used in any css properties. syntax the <frequency> data type consists of a <number> followed by one of the units listed below. as with all css dimensions, there is no space between the unit literal and the number. units hz represents a frequency in hertz. examples: 0hz, 1500hz, 10000hz. khz represents a frequency in kilohertz. examples: 0khz, 1.5khz, 10khz. note: although the number 0 is always the same regardless of unit, the unit may not be omitted. in other words, 0 is invalid and does not represent 0hz or 0khz. ...
...wable <length>, it's an invalid <frequency>. specifications specification status comment css values and units module level 3the definition of '<frequency>' in that specification. candidate recommendation initial definition. note: this data type was initially introduced in css level 2 for the now-obsolete aural media type, where it was used to define the pitch of the voice. however, the <frequency> data type has been reintroduced in css3, though no css property is using it at the moment. ...

<hatch> - SVG: Scalable Vector Graphics
paths are defined by <hatchpath> elements. ...
...ributes core attributes global event attributes presentation attributes style attributes specific attributes x y pitch rotate hatchunits hatchcontentunits transform href dom interface this element implements the svghatchelement interface. ...

Audio for Web games - Game development
dio at lower bit rates means smaller file sizes but lower seeking accuracy. background music music in games can have a powerful emotional effect. you can mix and match various music samples and assuming you can control the volume of your audio element you could cross-fade different musical pieces. using the playbackrate() method you can even adjust the speed of your music without affecting the pitch, to sync it up better with the action. all this is possible using the standard <audio> element and associated htmlmediaelement api, but it becomes much easier and more flexible with the more advanced web audio api. let's look at this next. element and associated htmlmediaelement api, but it becomes much easier and more flexible with the more advanced web audio api. let's look at this next. w...