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Technical, but very exciting. Could be a very efficient way to generate speech sounds, and particularly for repairing audio.
 
WaveNet: A Generative Model for Raw Audio | DeepMind

'This post presents WaveNet, a deep generative model of raw audio waveforms. We show that WaveNets are able to generate speech which mimics any human voice and which sounds more natural than the best existing Text-to-Speech systems, reducing the gap with human performance by over 50%.

We also demonstrate that the same network can be used to synthesize other audio signals such as music, and present some striking samples of automatically generated piano pieces.'

https://deepmind.com/blog/wavenet-generative-model-raw-audio/
This post presents WaveNet, a deep generative model of raw audio waveforms. We show that WaveNets are able to generate speech which mimics any human voice and which sounds more natural than the best existing Text-to-Speech systems, reducing the gap with human performance by over 50%. We also demonstrate that the same network can be used to synthesize other audio signals such as music, and present some striking samples of automatically generate...
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Eden Segal-Grossman's profile photoBasho YokozunaStyle's profile photo
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Where do we get this awesome stuff
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OMG. If this were posted on April 1st I would think it was a superbly done hoax.

h/t +Matt Thompson 
 
This is an Octobasse. It Makes a Cello Look Like a Violin

  This is the Octobasse, it was invented in 1850 by French violin maker Jean-Baptiste Vuillaume. It has three strings and stands roughly 3.48 meters tall (11.4 ft). Because of the extreme fingerboard length and string thickness, the musician plays it…
  This is the Octobasse, it was invented in 1850 by French violin maker Jean-Baptiste Vuillaume. It has three strings and stands roughly 3.48 meters tall (11.4 ft). Because of the extreme fing...
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Aswin Mujahid's profile photo
 
I wanna ask some question....: what the audacity author/programmer email, so i can give some suggestion for application development/improvement...?
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Oh wow...  great fun performance... and makes me think of all those crazy mechanisms... that actually work...   hidden inside Audacity and that you don't usually see.  We don't have one of these in there - yet.
 
Holy crap, this musical marble machine is amazing!

Have been watching various videos of the guy building the machine over the past year.  First became aware of it when he emailed me asking questions about gearing a long time ago.
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best dj ever..
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Audacity 2.1.2 Released!

The download is from fosshub.

Thanks to everyone here who tested the release candidates and gave feedback.  Main visible new feature, thanks to Paul Licameli,  is spectral reassignment which calculates a more fine-grained spectrogram.  The new spectrogram is particularly suited to voice work.
Jan 20th, 2016: Audacity 2.1.2 Released. Audacity 2.1.2 replaces all previous versions. We've made several improvements to the spectrogram view of tracks which are particularly valuable for vocal work. Thanks to Paul Licameli. New option 'Spectral Reassignment'. This algorithm deduces a 'finer' ...
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Fahad Al-Saidi's profile photominton brunkhorst's profile photoT Byrd's profile photoScott K's profile photo
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Scott K
 
Doubt I can get any help here but I cannot open Audacity on my iMac. I had it installed before but did not use much. Recently tried to open it and it would not open. Downloaded latest version and overwrote old version. Still would not open - received following message:
The application “Audacity.app” can’t be opened.
So found a site that told me how to remove completely from computer. Was for older version I think.
Then reinstalled - got same message when trying to open:
The application “Audacity.app” can’t be opened.
Can someone tell me what to do?
I tried on a different MacBook Pro I own and it installed fine.

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Audacity 2.1.2 RC1 is now available for testing.  Please give it a try.

http://www.fosshub.com/Audacity.html

There's been a lot of work since 2.1.1 to get here.  We are using wxWidgets 3.0.2 rather than 2.8.12 as our interface library.  That's a lot of change.  However, we hope you won't see a lot of visible difference.  Paul Licameli did add some cool new features to spectrograms, which you can read about in the updated manual.

Please kick the tires, help us test it on more machines, and leave a comment.
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I'll wait for the release.
96%
Tried it. LGTM
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Tried it. I left a comment.
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Mark Fraser's profile photoFrederick Yap's profile photoPetru Guta Ciucur's profile photoAudacity®'s profile photo
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Thanks to the 4 people here who gave RC1 a try.  

Right towards the end of our own testing we found a bug that had to be fixed.  We write a temporary file, and then try and rename it, but a virus checker can be analysing the file we just wrote and prevent us renaming it.  The result was that in RC1 you could make changes to your settings, and if you had one of these badly behaved virus checkers running the changes sometimes wouldn't take.  We now, thanks to Leland, back off a bit and try again if the virus checker didn't let us rename.  

We made a few other small changes at the same time too and have made a new release candidate, RC2, which is available for testing.  Most of you will want to wait until we actually release it as 2.1.2.  We expect that will be soon.
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People who work in graphics think of the Gibbs phenomenon [2] as an evil to be eliminated, but in the audio world the opposite holds: it's something you need to put into your signals to make them sound right.

What could be easier than playing a square wave on a computer? You just need to generate samples that alternate between 0 and 1 and send them to whatever part of the OS accepts sound samples.

The problem is: your OS probably expects samples that represent a band limited signal [3]. In other words it expects a signal whose Fourier transform has components only in the range 0 to f, where f is the Nyqvist frequency [4], half of the sample rate you’re working with. So if you want to play a square wave you need to send samples not from a perfect square wave, but from a square wave with all frequencies outside the range [0,f) removed. If the audio hardware is working correctly it will exactly reproduce this band-limited signal from the samples and the result should sound just like a perfect square wave, assuming you can't hear signals outside of the range [0,f).

But what does a band-limited square wave look like? It's what you get when you compute just a partial sum the Fourier series for a square wave and it looks just like the attached picture. You get overshoots and oscillations where the original square wave has discontinuities - the so-called Gibbs phenomenon [2].

In the graphics world these kinds of "ringing" effects are things to be eliminated if possible. For example some kinds of compression artifact are a form of the Gibbs phenomenon [1]. But with audio, if you want to play a piecewise linear signal say, you have to do the opposite. You need to find all of your discontinuities and add in a suitable ringing effect.

Given how fundamental this is, I'm surprised I've never seen the algorithms to do this efficiently described in an audio textbook. The information is scattered in a handful of papers [5] and is otherwise known through folklore, eg. code snippets in online forums.

If you don't add in ringing the result is clearly audible, especially for high-frequency tones which will be completely dominated by low-frequency aliasing [6].

[1] https://en.wikipedia.org/wiki/Ringing_artifacts#JPEG
[2] https://en.wikipedia.org/wiki/Gibbs_phenomenon
[3] https://en.wikipedia.org/wiki/Bandlimiting
[4] https://en.wikipedia.org/wiki/Nyquist_frequency
[5] http://www.cs.cmu.edu/~eli/papers/icmc01-hardsync.pdf
[6] https://en.wikipedia.org/wiki/Aliasing
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Angel Camacho's profile photoLynn Benson's profile photoMatt Thompson's profile photostein shaw's profile photo
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+Sarah Shaw   how is you math, have you covered the fast Fourier transform (FFT) yet?
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Audacity 2.1.1 Released!

The download is from fosshub.

Thanks to everyone here who tested the release candidates and gave feedback.
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Audacity®'s profile photoVictor Westmann's profile photoPetru Guta Ciucur's profile photo
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When will be released 2.1.2 version? Any theme module?
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Wow! DarkAudacity have shared their customised DarkAudacity 2.1.3x (the x is for experimental) release.

This is a trailblazer to try out the dark theme and a more logical layout for the menus.

DarkAudacity is a significant initiative to upgrade Audacity. Lots more about it, and the download info, from http://www.darkaudacity.com/download.html .
 
DarkAudacity 2.1.3x for Windows (only) has been released. Hope you like it.

It's based on work in progress on 2.1.3, so it IS an alpha, not a properly QA tested release. If you want a QA tested version, wait for Audacity 2.1.3 to come out. It's due end September. Audacity 2.1.3 won't have the new look. Audacity 2.1.4 may have some of the new look as an option. Exactly what will be in 2.1.4 is still to be decided, and in part may be based on feedback on DarkAudacity 2.1.3x - so try it out and give feedback.

Download information for DarkAudacity 2.1.3x at http://www.darkaudacity.com/download.html . Enjoy.
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Audacity®'s profile photoMichael Stockton's profile photoCute Star McSparkles's profile photobharti sharma's profile photo
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I like
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Work on Theming Hots Up!

DarkAudacity is a project to improve the theming and GUI in Audacity, making it simpler and clearer without losing functionality. It's been going well so far, and seems on course to be a very welcome makeover. We will take carefully chosen changes and add them into Audacity, if the DarkAudacity project goes well. Audacity will continue to have a light theme as the default.

Whilst you are waiting, there is some bonus content, a first-step dark theme-file that works already with Audacity 2.1.2. The dark theme is available from FossHub. Download, unzip, follow the instructions and enjoy!

http://www.fosshub.com/DarkAudacity.html
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Cool music experiments in Google Chrome.
 
Music is for everyone. Play with simple experiments that let anyone, of any age, explore how music works.
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Ricky Cadden's profile photoBruce Elliott's profile photo
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I have the same question as +Ricky Cadden​. I'm looking to get a new home PC, and the only thing I do that requires more than mobile apps is audio editing. I if Audacity could run on a Chromebook, that would seal the deal for me.
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Sneak preview.... Our new website that we're working on is at http://audacity.audio . When we release 2.1.2 what's there will move to http://audacityteam.org . The big change - we are now using WordPress. This will make it easier to improve the site. We should have done this a long time ago!

At the moment the content is almost exactly the same as the old site's. That's gradually going to change. 
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Robert Buchanan's profile photoBrian L's profile photoahmed el hadir's profile photoPazzy Junim's profile photo
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I have try Audacity on Windows 10 and it is greatly works.
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At last, a really good web-based audio editor.  The entry level option is free.  Great feature is collaborative audio editing - like google docs.

Unlike the Aviary/Myna web-based audio editor this one is unlikely to go away.  It looks as if Google is promoting classroom use and use on Chromebooks.  I personally think this is heading in the right direction to becoming part of Google apps.

Interested to hear other people's opinions.
 
"After digging through tons of research about audio editing on a Chromebook, I stumbled upon a web-based application on http://www.soundtrap.com called Soundtrap.  It immediately met criteria number one.  It’s minimalistic without being overbearing but screams easy to use.  Soundtrap houses a multi-track editor, enough space to work on five projects at once, and offers a critical aspect to any educational technology application; collaboration."
I can honestly say that my fears about not being able to use our iMacs to create and collaborate through audio were entirely unfounded.  What developers are currently doing with web-based applicati...
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David Halver's profile photoMichael Stockton's profile photoEdouard Tavinor's profile photoSoundtrap's profile photo
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Thanks for your endorsement, +Audacity®! :) We're very happy for the support we're getting, now! Here's another example:  http://thenextweb.com/apps/2015/07/04/this-song-is-called-mic-is-writing-an-article/keyboard-soundtrap/
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The forum (see recommended links) is the best place for questions about using Audacity
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Audacity is free, open source software for recording and editing sounds
Introduction
Audacity is free software, developed by a group of volunteers and distributed under the GNU General Public License (GPL).

You can use Audacity to:

  • Record live audio.
  • Convert tapes and records into digital recordings or CDs.
  • Edit Ogg Vorbis, MP3, WAV or AIFF sound files.
  • Cut, copy, splice or mix sounds together.
  • Change the speed or pitch of a recording.