live-coding

Recent discussions show that it is still possible for the load_synthdefs function to raise an un-handled error if it is given the path to a SynthDef file instead of a directory of SynthDefs.

We should fix this by raising a more useful error that describes the problem in a clearer way.
I suggest adding something like the following line:

raise "The load_synthdefs function expects an 

Currently, a lot of operations are being done in the componentDidUpdate, and as Dan mentioned on #377 this is a pattern that must be avoided, in order to prevent nested updates. So, we need to find out how to improve this method and address other performances issues that this might be causing.

I haven't gone any further and haven't collected evidence of any performance issues, but as the curr

fadeTime is missing tidalcycles/Tidal#618

While we're about it, lets check to see if others are missing

The Turtle.write() method puts the text too low on the browser canvas, so shift the y coordinate slightly higher.