[Ardour-Users] rework of tempo editing

nick mainsbridge mainsbridge at gmail.com
Mon Feb 27 16:04:21 PST 2017

you can download the next nightly build, or compile it yourself from master.



On 28 February 2017 at 10:37, Chris Share <cpsmusic at yahoo.com> wrote:

> I'd like to help out with testing.
> How do I get a copy?
> Cheers!
> ------------------------------
> *From:* nick mainsbridge <mainsbridge at gmail.com>
> *To:* ardour-dev at lists.ardour.org; ardour-users <
> ardour-users at lists.ardour.org>
> *Sent:* Tuesday, 28 February 2017, 10:16
> *Subject:* [Ardour-Users] rework of tempo editing
> rework_tempo_editing branch has been merged into master.
> the rework focuses mainly on matching tempo to existing material.
> not many people require this sort of workflow, so this is a plea
> to all available testers to help find bugs and crashes.
> Main Change:
> tempo markers now have a start and an end rate with common note type.
> when a new tempo is added, altering it's start tempo
> (e.g. by shift-dragging the blue tempo curve) will no longer cause it to
> move.
> Technique (one of many possible ones):
> tempo matching to a 'free time' recording requires an initial stretch of
> constant tempo.
> the tempo is most easily adjusted by shift-dragging the blue tempo curve
> or the BBT ruler.
> attempt to match the tempo by doing this until the tempo lines match the
> material
> for as long a distance as possible.
> assuming that this initial one doesn't match the whole recording, the last
> 'good' alignment between
> the click and the recording is marked with a new tempo (ctrl-click on the
> blue tempo curve).
> there are now two choices, depending on the material:
> 1) there is a sudden change to a new tempo
> - shift-drag the blue tempo curve (the more distance you have between the
> new mark
>   and the mouse, the better) until the recorded tempo matches the new
> section.
>   observe that the tempo point changes colour to indicate a discontinuity
> between the end
>   of one section and the beginning of the next.
> 2) the tempo drifts up or down from the currently set tempo
> - guess (or listen to) the duration of this drift and place a new tempo
> mark on the BBT line
>   corresponding to your guess. when in doubt use two bars of distance.
> - shift-drag the new mark until its BBT position aligns with the
> recording. this will set the
>   end tempo of the previous mark.
>   if this doesn't match all the way to the next mark, align as much
> distance as possible
>   and place a new mark (shift click) a the last 'good' spot.
>   you may now shift-drag the last mark (the wrong guess one) to align the
> rest of the section.
>   match the tempo of the last stretch of music in the usual way (shift
> drag the tempo curve).
>   repeat.
>   control-dragging a tempo copies it, so this is the usual way to return
> to a known tempo (click-based recording).
> Other tools:
> if a ramp is required to some next tempo, right click and select 'Ramp to
> Next'.
> to reset a tempo to constant, right click and select 'Set Constant'.
> the start/end tempi may be adjusted by grabbing a mark with no modifiers
> pressed,
> then holding shift or ctrl-shift while vertical dragging.
> shift-control-drag on the blue tempo curve (if there are a few surrounding
> tempi) does something interesting.
> thanks in advance for your bug reports :)
> Nick
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