Re: Midish "If" functions

On Tue, Feb 06, 2018 at 09:38:51PM +0100, Jeanette C. wrote:
> Feb 6 2018, Alexandre Ratchov has written:
> ...
> > Sorry, I was mistaken. There were patches to make this kind of
> > mapping, but it was not commited because it broke other parts of
> > midish.
> Gravely? Otherwise, it would make a few things possible and easier.
> Especially old synth like to talk a lot of SysEx. :)
> ...

It's all about allowing filters to convert any event to an event of
different type. Example, pitch bend could be mapped to a controller,
which is handy. But this introduces two problems:

- certain event representation must change, which may break existing
  scripts

- this brings few weired situations: exemple, how to convert pitch
  bend events to note events maintaining one-to-one correspondence?

> > evpat mysysex {0xf0 0x3e 0x0e 0x00 0x1d v0 0xf7}
> > fmap {ctl input_chan 72} {mysysex output_dev}
> So the controller's value will get passed to v0, it's sort of a
> positional argument, like shell variables $1, $2,... Thanks for the
> example.

Yes, v0 and v1 are the two parameters; this makes sysex messages look
like other midi events, allowing sysex to be stored in tracks and used
to control synths in real-time.