Audacity Forum

This may help as a start. It can be run in the Nyquist Prompt effect. It "sort of works", but the function to calculate the new length after stretching needs to be written. ;version 4 ;control initial-pitch "Initial pitch" float "" 0 -12 12 ;control final-pitch "Fi...

What I am trying to do is change the speed from one point to another, that's all. In other words, create a Jaws-accessible version of timetracks. Thanks, I now understand what you're trying to do, and it's a very good idea. It is, however, tricky to code. The hardest part is working out the time po...

If you try running that code using the "Debug" button rather than the "OK" button, you will see an error message saying: error: unbound variable - FINISH That means that somewhere in your code you are using a variable called "finish" but it is not set to anything, so Ny...

john3voltas wrote:Can you actually hear people talking in a foreign language?

As you can see, there's some distortion, but yes I can hear a conversation.

Gale Andrews wrote:I guess Steve has a later version of FFmpeg

Yes, I've got FFmpeg 2.8.11

That file opens fine on my machine.
I can't test on Windows right now, but will probably be able to do so tomorrow, so I'll get back to you when I've tried that.

Yes I can agree to that.

Do you have a small sample file that we could test?
I tried a g729 on my machine and Audacity imported it fine, but I'm on Linux (so a different FFmpeg build) and I'm not 100% sure that it was g729a.
I would have expected g729 import to work.

Are you sure that they are valid g729 files? How do you know?

I think SoX will be your better option. Their noise reduction effect is documented here: http://sox.sourceforge.net/sox.html#EFFECTS (see: "noisered")
There are some example bash scripts that you may find helpful here: viewtopic.php?f=28&t=53669

it generally analyses lower frequencies in more depth. A simplified description of how Plot Spectrum works is that it divides the audio frequency range into lots of narrow frequency bands. Each frequency band has equal width in Hz . The number of bands (hence the width of each band) is determined b...