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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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Alex Mendoza's profile photoyusuf demir's profile photo
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' ...
Fahad Al-Saidi's profile photominton brunkhorst's profile photoT Byrd's profile photoScott Kauer's profile photo
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 “” 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 “” 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.

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.
Tried it. LGTM
Tried it. I left a comment.
Mark Fraser's profile photoFrederick Yap's profile photoPetru Guta Ciucur's profile photoAudacity®'s profile photo
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].

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Angel Camacho's profile photoLynn Benson's profile photoMatt Thompson's profile photostein shaw's profile photo
+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.
Audacity®'s profile photoVictor Westmann's profile photoPetru Guta Ciucur's profile photo
When will be released 2.1.2 version? Any theme module?
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Neat idea for updating the 'waveform' part of the Audacity logo.
I know nobody asked me to do it, but I personally felt I'd like to have slightly changed logo in order to remind me of RGB 100 100 220 and RGB 50 50 220 colors used in Audacity and to remind me I can edit more than one audio track... so, I have added a representation of two tracks outlined with colors from the existing logo... Here's my proposed change to the existing logo that I have uploaded to Wikimedia ;-)
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Lothar J's profile photoBrian Artis's profile photoTN Free Blocks's profile photoJoan CiberSheep's profile photo
It might be a good idea to update the logo.
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This is probably in part due to google code (which provided ad free downloads and an excellent reliable service) closing its doors.  Audacity shifted to using FossHub, but because we are GPL we can't actually stop sourceforge continuing to host our downloads.
Filed Under: Internal warnings that need to be public.

" is bundling adware/malware/crapware with the installers of a number of open source applications - this is not cool to say the least. We wanted to make you all aware that this is happening and continuing to increase in prevalence. As such, Please don't download apps from as it is almost certainly not the true source of the project you are looking to get."
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Chad Serrant's profile photoSidney Rutledge's profile photoAudacity®'s profile photoGregg Levine's profile photo
I saw that. They are not happy.
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In their circles
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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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Are there any plans to bring Audacity to Chrome? I'm looking at a Chromebook, but being able to record/edit podcast is a dealbreaker for me, and there don't seem to be any solutions currently. 
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Sneak preview.... Our new website that we're working on is at . When we release 2.1.2 what's there will move to . 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. 
Robert Buchanan's profile photoBrian L's profile photoahmed el hadir's profile photoPazzy Junim's profile photo
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 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
Thanks for your endorsement, +Audacity®! :) We're very happy for the support we're getting, now! Here's another example:
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Release Candidate 2 (RC2) for the upcoming Audacity 2.1.1 is now available for testing at

We'd particularly like testing of VST effects and longer recording, say of 2 hours (much longer and Audacity starts to get too slow).

The main new feature in this release is 
Tim Oestmann's profile photoBryce Bruder's profile photoSam Onthego's profile photoAudacity®'s profile photo
Would anyone here like to help out answering questions on the audacity forum?  It would be great to have people who are using Audacity help people who are new to Audacity.  
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Upcoming feature in 2.1.1, Scrubbing.

Ctrl-click and now the position of the mouse controls how fast the audio plays.  The nearer the cursor the slower it plays, the further away the faster.  The speed can change as you move the mouse.  A number shows the current speed.  Here 0.5 the normal rate and the number is in orange rather than green in this screenshot because it is playing from right to left!  

Scrubbing is mainly used to find your position in the audio quickly.  Some people will like it, but it shouldn't "get in the way" for people who don't use it.  
Tomáš Valůšek's profile photoRoberto Croizay's profile photoDavid Van Nuys's profile photoAudacity®'s profile photo
+David Van Nuys it's available in RC2 right now, if you'd like to join in testing the latest development version.
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Audacity®'s Collections
Audacity is free, open source software for recording and editing sounds
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.
Contact Information
Contact info
The forum (see recommended links) is the best place for questions about using Audacity