Сhanging project rate.

[юра00]

Dear experts! Is it possible to improve the editor so that changing project rate could be included to the chain (macros)?

[steve]

Anything is possible, but what is your specific use case? What are you trying to do?

[юра00]

My favorite music is 60-70-th, among the tracks when downloading there are records with low rate, for example 22500 Hz. Just in case, I raise it to 44000 or 48000 Hz, now there are no hot keys or chains for this, I have to translate the value in the lower left corner every time.

[steve]

60-70-th

I don't understand what that means.

Just in case, I raise it to 44000 or 48000 Hz

Why?

[юра00]

I've meant the songs of 1960-70s. And on the second question: I sometimes send music to sites, and so, on some, files with a low, up to 44000 Hz, are not accepted.

[steve]

It is not yet possible to change the project rate with a macro command, so I'll put the suggestion to the developer that has been working on the new macro commands.

Regarding your specific use case, there are a number of ways that the problem could be solved, some of which are possible now, and some of which are feature requests:

1) Specify the sample rate in the export command.
This is not currently possible using Audacity's built-in exporters (though it logged as a frequently requested feature), but it IS possible using the "external program" export option https://manual.audacityteam.org/man/exp ... ogram.html
For example, if you have SoX installed (http://sox.sourceforge.net/Main/HomePage) and you want a WAV file with a sample rate of 44100 Hz, then you can use the command:

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sox -t wav - -r 44100 "%f"

2) Ensure that the file is not imported into an empty project. This won't work when batch processing, because the batch process effectively creates a new project on import, but is easily done in other cases. If the project is not empty, then Audacity retains its current project rate.

3) Feature request: Ability to specify the sample rate as an export setting.

4) Feature request: Preference setting to NOT change the project rate when importing.

5) Batch process your files with a suitable transcoding application so that they are all in an appropriate format before using Audacity.

6) Use Python (or any language that supports "named pipes") to drive Audacity via mod-script-pipe. Mod-script-pipe is not yet available as a ready-built module, but it is on its way. More info: https://manual.audacityteam.org/man/scripting.html

[юра00]

"External program" export - I don't quite understand. A window opens with the lame command and something further. And how can I choose a format and bit-rate now? And other options that were available in the usual mp3 export?

[юра00]

These options? How can I choose? Preset, variable, stereо, joint stereo...

[steve]

The "external program" export option allows you to specify any command line encoder that you have installed on your computer.
Examples are included for "lame" and "ffmpeg" command line encoders.
In my previous post I gave an example using SoX command line encoder.

Detailed instructions for the "external program" export option are here: https://manual.audacityteam.org/man/exp ... ogram.html

SoX may be downloaded here: http://sox.sourceforge.net/
The full SoX manual is here: http://sox.sourceforge.net/Docs/Documentation

[юра00]

Well, is it possible to upgrade a command for sox

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sox -t wav - -r 44100 "%f"

so that the export is in mp3 format, 48000 Hz and bit rate of 320 kbit/s? That is, I guess that wav should be replaced by mp3, 44100 - to 48000, and how to set the bit rate of 320 kbit/s?

Code: Select all

sox -t mp3 - -r 48000 "%f"

By the way, the program has not been updated for a long time.