Convert Label text to LRC file

[steve]

(with-open-file ...

Where did that come from?

error: unbound function - WITH-OPEN-FILE

That means that the function "with-open-file" is unknown. It's not a valid function name.
The function you need for opening a file is "open". See: https://www.audacity-forum.de/download/ ... ef-190.htm

[bigboss97]

All good now. Thank you so much for your time.

(with-open-file ...

Where did that come from?

This is a macro in Lisp because I googled for Lisp commands

[steve]

Although Nyquist is a form of Lisp, it is based on a very small version of Lisp called XLisp. Other, bigger versions of Lisp (such as "Common Lisp") have many language features that are not part of XLisp.

The XLisp manual is here: https://www.audacity-forum.de/download/ ... -index.htm
The part of the XLisp manual that you will use most frequently is the Language Reference: https://www.audacity-forum.de/download/ ... -index.htm

Virtually all XLisp commands are valid in Nyquist. The (very few) XLisp commands that don't work in Nyquist are noted to that effect.
The XLisp manual is particularly helpful as it includes lots of examples.

Nyquist also has additional command that aren't part of XLisp. These are nearly all audio related functions, and can be found in the Nyquist Index: https://www.cs.cmu.edu/~rbd/doc/nyquist/indx.html

[bigboss97]

Thank you so much, Steve.
I've bookmarked this thread. I'm sure I'll revisit all these information.

[bigboss97]

Sorry, I have to come back and ask for help again I did try to google and couldn't find any usable results.
My plug-in is now working, but it can't handle Unicode. How can I make it write Unicode file?

Code: Select all

(setq f (open fName :direction :output :if-exists :supersede))
*snip*
    (format f (if (string= (third label) "^") "~%[~a]" "<~a>~a<~a>") timeS (third label) timeE)))
(close f) 

I can see Export Labels have no problems in Unicode. I also tried to locate that plug-in without success. Is Export Labels a plug-in?

[steve]

Nyquist doesn't support Unicode, only ASCII.
If you really must have Unicode support, then it may be possible to use read-byte and write-byte, but there are lots of ways that the code can trip up with Unicode.

[bigboss97]

Nyquist doesn't support Unicode, only ASCII.

Does that mean when I retrieve the label (using Nyquist) the dual-byte information already lost? Which means I have no chance to write the unicode to a binary file. Is that correct?

[steve]

Does that mean when I retrieve the label (using Nyquist) the dual-byte information already lost?

I had to check. The answer is yes. The "aud-get-info" command returns ASCII characters. Audacity converts multi-byte character to underscore ("_") before sending the data to Nyquist.

[bigboss97]

The "aud-get-info" command returns ASCII characters. Audacity converts multi-byte character to underscore ("_") before sending the data to Nyquist.

Yes, I got underscores in my files.

That means I've no chance of building an unicode plug-in. Okay, then I need a plan B...
I can write a separate program to convert the exported label file to LRC. Is it possible to write a kind of macro to export the labels and then execute my converter? So the user can do all these in one step.

[steve]

You can get multi-byte characters from labels using "GetInfo: Type=Labels Format=JSON" via Python.
See here for the latest information about scripting with Python: https://alphamanual.audacityteam.org/man/Scripting
(That is actually the manual for Audacity 2.4.0, which is not yet released, but it's more up to date than the equivalent page in the 2.3.3 manual).