[PD] looking for other vanilla filters or abstractions for libPD

Shahrokh Yadegari sdy at ucsd.edu
Mon Nov 9 07:33:40 CET 2015

I am happy to distribute expr/expr~/fexpr~ objects on BSD license. The
original expr code that I wrote at IRCAM, was made available as GLP by
IRCAM, and later they were kind enough to change that to LGPL. They may be
fine with BSD as well. I will ask and find out.


On Sat, Nov 7, 2015 at 12:08 PM, Alexandre Torres Porres <porres at gmail.com>

> Shahrokh is working on a new release of the expr family of objects (0.5)
> I'm copying him here, and I wouldn't know what his restrictions or issues
> would be regarding the license. Maybe if properly discussed with him, we
> could find a way to choose a license that is suitable for the libpd apps.
> I agree that expr is essencial and such limitation would be bad for Pd
> apps.
> cheers
> 2015-11-07 17:24 GMT-02:00 Scott R. Looney <scottrlooney at gmail.com>:
>> thanks Jonathan. this is what i assumed re LGPL when i saw a discussion
>> about using fluidsynth in a build, which has a LGPL variant but not
>> anything more permissive. so one question would be if anyone here on the
>> list had a paid app rejected or accepted on the App Store due to using an
>> LGPL license? expr and expr~ are very useful for a variety of things but
>> for now i'm not using them due to this offchance.
>> i would further guess that FSF's exact words on LGPL were probably pretty
>> dark on using the iTunes Store in general. i've seen some announcements
>> from them in the past that made it clear how they feel about walled gardens.
>> best,
>> scott
>> On Sat, Nov 7, 2015 at 9:18 AM, Jonathan Wilkes via Pd-list <
>> pd-list at lists.iem.at> wrote:
>>> > As of about 2 years ago, expr and relatives are LGPL and thus
>>> compatible with the App Store.
>>> I emailed the Free Software Foundation, who are the publishers of the
>>> LGPL.  They responded
>>> that the LGPL is not compatible with the restrictive terms of Apple's
>>> app store.
>>> I forgot to ask them in advance if I could publicly post their
>>> response.  If they say I can do so, I'll post their actual response.
>>> But it sounded pretty clear.
>>> I suppose one could argue if it's a free app then who cares, and that
>>> the copyright holders of expr (or even Apple) are extremely unlikely to
>>> create a licensing fuss.    But then that's the case whether expr is GPL,
>>> LGPL, or even "don't use this to murder people with drones" license.
>>> If you want to write/use open source software that's compatible with
>>> Apple's app store, use
>>> the 3-clause BSD license.
>>> -Jonathan
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Shahrokh Yadegari
Professor of Composition and Sound Design,
Theatre and Dance Department
University of California, San Diego
Director, Initiative for Digital Exploration of Arts and Science, (IDEAS)
California Institute for Telecommunications and Information Technologies
Email: sdy at ucsd.edu
Web: http://yadegari.org
Tel: (858) 822-4113
Fax: (858) 534-1080
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