Audacity Forum

Dear all, Here is my specification for an A-filter, the filter specified in IEC 61672 for A-weighting sound prior to measurement. Even if this filter has been challenged because it doesn't quite give a true and complete answer to psychoacoustic response measurement of human hearing, it prevails in n...

Developing an application that is interoperable with Audacity projects does not require the C/C++ programming language. Any computer language could be used to create a program that is capable of reading/writing Audacity projects. The project format is independent of the programming language. I agre...

Enedrox, At http://audacityteam.org/xml/?lang=en one can find the following Audacity uses an open XML file format to encourage interoperability. Beginning with version 1.3.0, we are publishing the following DTD to aid those who want to develop software that reads and writes Audacity project files: a...

I think I have now a better understanding of the .au format. Bytes . . . . . . . . . . . Content --------------------------------------------------------------------------------------------------------------------------------------- 4 . . . . . . . . . . . . . "dns." [exact reverse of .snd, the "mag...

Thank you all for the example and its solution. Just out of interest - why? It would be much simpler to work in raw PCM format. I hope in a future to have all processing done inside Audacity, but for the time being, some processing must be done using specific software such as Matlab, Scilab or Octav...

We warn people that Audacity is not a WAV editor but an audio production editor. Data sacrifices and deviations are tolerated in order to produce a pleasant sounding show. I think that being an audio production editor is not incompatible with being an excellent tool for any kind of sound processing...

Thank you for that link. However, I agree that this information is too brief. What sort of analysis do you want to do? To import into Matlab etc. it will probably be easiest to export as raw pcm. I want, for instance, to get the audio, modify it and save it in the Audacity native format. Now I know ...

As far as I'm aware the .au files are headerless one channel PCM audio. The bit format and sample rate is defined by the .AUP file. I've been trying to examine the contents of the .au file (sort of reverse engineering). In fact it has a header, it starts with sdn. (I guess it is short for "sound"),...

Dear All,

I'm new to this forum.

Does anybody know where one can download a specification of the structure of .au files in the data folder of an Audacity project?

I mean headers, data format and so on.

Thank you in advance

Federico Miyara