rall. and accel stopped working in articulate.

rall. and accel stopped working in articulate.

According to the the git logs, in February 2011 the way that tempo
changes for MIDI were interpreted changed from just the
tempoWholesPerMinute property to use a TempoChangeEvent.

This broke rall. in articulated MIDI output.

This patch brings the articulate script up-to-date wrt to the way that
tempo changes are signalled, and also adds accel. and poco accel. to
the list of accepted scripts.

Reported-by: Thomas Morley <thomasmorley65@googlemail.com>
Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>

[Peter Chubb, 2012-03-27 03:41:14]

Hi folks,
  Thomas Morley noticed that rall. had stopped causing tempo change in MIDI
output when using articulate.

The patch I uploaded to Rietveld fixes that.

[Graham Percival, 2012-03-27 03:49:18]

LGTM.  You can send this to James for pushing whenever you want, provided that
it passes Patchy test-patches.

You might prefer to wait a day or two in case any scheme person has some good
ideas to make it better; partly to increase the patch quality, but also for your
own education about scheme.

[Carl, 2012-03-27 04:33:47]

LGTM

[dak, 2012-03-27 05:48:48]

On 2012/03/27 03:49:18, Graham Percival wrote:
> LGTM.  You can send this to James for pushing whenever you want, provided that
> it passes Patchy test-patches.
> 
> You might prefer to wait a day or two in case any scheme person has some good
> ideas to make it better; partly to increase the patch quality, but also for
your
> own education about scheme.

Well, obviously using stuff like map-some-music, fold-some-music would make
things quite more straightforward, efficient and robust, likely making it easy
to avoid using event-chord-wrap!.  But that concerns the whole script, not just
this change.

[pkx166h, 2012-03-30 06:53:29]

Peter, this has passed our 'countdown' review, if you don't yet have push access
you can email me a git-formatted patch and I can push it for you.

James

[peter_chubb.wattle.id.au, 2012-04-03 23:21:37]

>>>>> "pkx166h" == pkx166h  <pkx166h@gmail.com> writes:

pkx166h> Peter, this has passed our 'countdown' review, if you don't
pkx166h> yet have push access you can email me a git-formatted patch
pkx166h> and I can push it for you.

OK here it is.