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Tone.js is a Web Audio framework for creating interactive music in the browser. The architecture of Tone.js aims to be familiar to both musicians and audio programmers creating web-based audio applications. On the high-level, Tone offers common DAW (digital audio workstation) features like a global transport for synchronizing and scheduling events as well as prebuilt synths and effects. Additionally, Tone provides high-performance building blocks to create your own synthesizers, effects, and complex control signals.
To install the latest stable version.
Or to install the ‘next’ version
To import Tone.js:
Tone.Synth
Launch Wondershare Spotify to MP3 Converter, then click the Downloader tab to hit the button, then you'll get a pop-up window as the Download MP3 menu shows. Step 3 Set Download Settings. Now paste it into the Download MP3 to proceed. Once completed, you can switch to the Finished tab to get the downloaded MP3 files. Streaming music is a big deal these days but some users can't seem to break the habit of hoarding MP3s. So what if it was possible - with a free or premium account - to download MP3s from Spotify.
- How to Download Music From Spotify on Mobile. On mobile, you can download playlists, albums, or podcasts. Downloading Albums and Playlists on Spotify. The interface is slightly different on.
- The first method is available to download Spotify music without Premium on Mac and Windows PC. But at present, there are still many people who prefer to listen to Spotify songs on Android. In this case, many users also would like to know how to download music from Spotify for free on Android.
- Download and install iMusic on your computer. Launch it and click 'GET MUSIC'. From there, you can see there are 3 ways for you to get MP3 music: download from the built-in music library, download from music site and record from radio stations.
Tone.Synth is a basic synthesizer with a single oscillator and an ADSR envelope.
triggerAttack / triggerRelease
triggerAttack
starts the note (the amplitude is rising), and triggerRelease
is when the amplitude is going back to 0 (i.e. note off).
triggerAttackRelease
triggerAttackRelease
is a combination of triggerAttack
and triggerRelease
The first argument to the note which can either be a frequency in hertz (like 440
) or as “pitch-octave” notation (like 'D#2'
).
The second argument is the duration that the note is held. This value can either be in seconds, or as a tempo-relative value.
The third (optional) argument of triggerAttackRelease
is when along the AudioContext time the note should play. It can be used to schedule events in the future.
Time
Web Audio has advanced, sample accurate scheduling capabilities. The AudioContext time is what the Web Audio API uses to schedule events, starts at 0 when the page loads and counts up in seconds.
Tone.now()
gets the current time of the AudioContext.
Tone.js abstracts away the AudioContext time. Instead of defining all values in seconds, any method which takes time as an argument can accept a number or a string. For example '4n'
is a quarter-note, '8t'
is an eighth-note triplet, and '1m'
is one measure.
Read about Time encodings.
IMPORTANT: Browsers will not play any audio until a user clicks something (like a play button). Run your Tone.js code only after calling Tone.start()
from a event listener which is triggered by a user action such as “click” or “keydown”.
Tone.start()
returns a promise, the audio will be ready only after that promise is resolved. Scheduling or playing audio before the AudioContext is running will result in silence or incorrect scheduling.
Transport
Tone.Transport is the main timekeeper. Unlike the AudioContext clock, it can be started, stopped, looped and adjusted on the fly. You can think of it like the arrangement view in a Digital Audio Workstation or channels in a Tracker.
Multiple events and parts can be arranged and synchronized along the Transport. Tone.Loop is a simple way to create a looped callback that can be scheduled to start and stop.
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Since Javascript callbacks are not precisely timed, the sample-accurate time of the event is passed into the callback function. Use this time value to schedule the events.
There are numerous synths to choose from including Tone.FMSynth, Tone.AMSynth and Tone.NoiseSynth.
All of these instruments are monophonic (single voice) which means that they can only play one note at a time.
To create a polyphonic synthesizer, use Tone.PolySynth, which accepts a monophonic synth as its first parameter and automatically handles the note allocation so you can pass in multiple notes. The API is similar to the monophonic synths, except triggerRelease
must be given a note or array of notes.
Sound generation is not limited to synthesized sounds. You can also load a sample and play that back in a number of ways. Tone.Player is one way to load and play back an audio file.
Tone.loaded()
returns a promise which resolves when all audio files are loaded. It’s a helpful shorthand instead of waiting on each individual audio buffer’s onload
event to resolve.
Tone.Sampler
Multiple samples can also be combined into an instrument. If you have audio files organized by note, Tone.Sampler will pitch shift the samples to fill in gaps between notes. So for example, if you only have every 3rd note on a piano sampled, you could turn that into a full piano sample.
Unlike the other synths, Tone.Sampler is polyphonic so doesn’t need to be passed into Tone.PolySynth
In the above examples, the sources were always connected directly to the Destination, but the output of the synth could also be routed through one (or more) effects before going to the speakers.
The connection routing is very flexible. Connections can run serially or in parallel.
Multiple nodes can be connected to the same input enabling sources to share effects. Tone.Gain is very useful utility node for creating complex routing.
Like the underlying Web Audio API, Tone.js is built with audio-rate signal control over nearly everything. This is a powerful feature which allows for sample-accurate synchronization and scheduling of parameters.
Signal properties have a few built in methods for creating automation curves.
For example, the frequency
parameter on Oscillator is a Signal so you can create a smooth ramp from one frequency to another.
Tone.js creates an AudioContext when it loads and shims it for maximum browser compatibility using standardized-audio-context. The AudioContext can be accessed at Tone.context
. Or set your own AudioContext using Tone.setContext(audioContext)
.
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To use MIDI files, you’ll first need to convert them into a JSON format which Tone.js can understand using Midi.
Tone.js makes extensive use of the native Web Audio Nodes such as the GainNode and WaveShaperNode for all signal processing, which enables Tone.js to work well on both desktop and mobile browsers.
This wiki article has some suggestions related to performance for best practices.
Tone.js runs an extensive test suite using mocha and chai with nearly 100% coverage. Each commit and pull request is run on Travis-CI across browsers and versions. Passing builds on the ‘dev’ branch are published on npm as tone@next
.
There are many ways to contribute to Tone.js. Check out this wiki if you’re interested.
If you have questions (or answers) that are not necessarily bugs/issues, please post them to the forum.
As more and more listeners prefer streaming music online, all kinds of music streaming services keep popping up with various features and their own quirks. Spotify, the dominant King in the music streaming world with millions of active users, is a freemium service and provides users with three types of subscription – Spotify Free, Spotify Premium ($9.99) and Spotify Family ($14.99).
Spotify offers a massive music library and enables all kinds of subscribers to listen to up-to-date music online anywhere anytime and it doesn’t take up space on your hard drive. But the downside of it, like other streaming music services, is that we are unable to download music from Spotify as local file because of its protection.
As a result, a great many people are wondering whether there is a way to get rid of the restrictions so as to download music from Spotify to MP3 format. In this article, we are going to introduce the best way to get music downloaded from Spotify (Free) to MP3 by applying the most popular Spotify music converting tool – NoteBurner Spotify Music Converter.
About NoteBurner Spotify Music to MP3 Converter
NoteBurner Spotify Music Converter is a professional tool which is able to record and convert Spotify songs to MP3, AAC, WAV or FLAC format, with ID3 tags and 100% lossless quality kept after conversion. Here are the key features of the program:
Features of NoteBurner Spotify Music to MP3 Converter:
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- Convert Spotify music to MP3, AAC, FLAC, WAV format;
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- Keep ID3 tags after conversion.
- Support burning Spotify music to CD in one-click;
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