Thread for Social Group MP3 posting

**Martin Jonas** · Mar-01-2021, 6:49am

Vincent and Harbor Lights lead sheets, for SAW group.

**JL277z** · Mar-05-2021, 10:00am

The Song-a-Week thread won't let me attach my own pics from my computer (Song-a-Week seems to only allow hotlinking to internet pics) so I'll have to put this here and then link to it. Concerns geometric "normal" and impossible 90-degree angles etc. My stylized representation of a Penrose triangle:

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**Martin Jonas** · Mar-10-2021, 12:48pm

Moon River for SAW

**Dodge89** · Mar-15-2021, 7:46am

Originally Posted by JL277z

The Song-a-Week thread won't let me attach my own pics from my computer (Song-a-Week seems to only allow hotlinking to internet pics) so I'll have to put this here and then link to it. Concerns geometric "normal" and impossible 90-degree angles etc. My stylized representation of a Penrose triangle:

I don't quite understand the cause of the problem.

**JL277z** · Mar-16-2021, 5:11am

Originally Posted by Dodge89

I don't quite understand the cause of the problem.

It's an optical illusion. Good explanation in this video:

(or direct link)

Some artists have made large sculptures. In Perth, Australia, a sculpture by Brian McKay:

(or direct link)

In Ophoven, Belgium, artist Mathieu Hamaekers uses a different strategy to achieve a similar illusion in his sculpture:

(or direct link)

More general info on Wikipedia at the "impossible objects" page.

**Martin Jonas** · Apr-08-2021, 3:43pm

Slower version of Lilibulero, for SAW.

**JL277z** · Apr-14-2021, 7:45am

For MandolinCafe Song-a-Week 543 Humphrey's Waltz. My try at transcribing the melody. I'm guessing at the chords, might be wrong. MuseScore MIDI-only playback: