Re: [Audacity-quality] Time Track alternatives

[Robert H. <aar...@gm...>]

On 05/07/2017, Steve the Fiddle <ste...@gm...> wrote:
> On 5 July 2017 at 08:44, David Bailes <drb...@gm...> wrote:
>> On Tue, Jul 4, 2017 at 3:14 PM, Steve the Fiddle
>> <ste...@gm...>
>> wrote:
>>>
>>> Attached is a "Sliding Speed Change" plug-in, which is hopefully
>>> accessible and easy to use.
>>
>>
>> this looks fine,
>
>
> Useful enough to ship with Audacity, or just put it on the wiki
> (http://wiki.audacityteam.org/wiki/Nyquist_Effect_Plug-ins) ?
>
It's rather a special case plug-in.

I would rather put it on the WIKI.
In fact, I would add a Category "Accessibility" where your excellent
"Text-Envelope" plug-in could go as well.

I use the latter a lot especially now that presets can be saved.

Robert
> Steve
>
>
>> David.
>>
>>>
>>>
>>> Steve
>>>
>>> On 3 June 2017 at 14:24, Steve the Fiddle <ste...@gm...>
>>> wrote:
>>> > On 3 June 2017 at 13:16, David Bailes <drb...@gm...> wrote:
>>> >> On Fri, Jun 2, 2017 at 11:21 AM, Steve the Fiddle
>>> >> <ste...@gm...>
>>> >> wrote:
>>> >>>
>>> >>> From a recent post on the forum:
>>> >>> https://forum.audacityteam.org/viewtopic.php?f=39&t=95995
>>> >>>
>>> >>> "I really find the Turntable Warp plugin very interesting. However,
>>> >>> I've tried to modify it so that there is no amplitude change, nor
>>> >>> Change Time (i.e. I want it to slide for the whole entire
>>> >>> selection).
>>> >>> Ever since I've tried to modify it, I never got it to work, So I
>>> >>> need
>>> >>> some help please."
>>> >>>
>>> >>> and then later, and most importantly:
>>> >>>
>>> >>> "What I am trying to do is change the speed from one point to
>>> >>> another,
>>> >>> that's all. In other words, create a Jaws-accessible version of
>>> >>> timetracks."
>>> >>>
>>> >>> I'm aware that Time Tracks are not accessible.
>>> >>>
>>> >>> I'm guessing that "Sliding Time Scale / Pitch Shift" is accessible,
>>> >>> but awkward to use (perhaps David can comment?)
>>> >>
>>> >>
>>> >> Using Jaws, the names of the tempo change edit boxes get read out
>>> >> twice
>>> >> (so
>>> >> that nvda reads them once), but apart from that, entering two values
>>> >> in
>>> >> these two edit boxes should be fine.
>>> >>
>>> >>> It is more complicated
>>> >>> than necessary as a Time Track alternative, and it is slow.
>>> >>>
>>> >>> Having looked at the Turntable Warp plug-in, the basic idea looks
>>> >>> pretty good, and it is quite fast (MUCH faster than Sliding Time
>>> >>> Scale), but the code is very buggy. Getting it right is quite
>>> >>> tricky,
>>> >>> but I'm confident that I can do that if it is worth the effort.
>>> >>>
>>> >>> In terms of sound quality, there is very noticeable aliasing when
>>> >>> processing generated tones, but for real-world recorded sounds the
>>> >>> quality is pretty good.
>>> >>>
>>> >>> Q. How much effort is it worth to make an accessible "sliding speed"
>>> >>> effect?
>>> >>
>>> >>
>>> >> If the time tracks were accessible for keyboard users, would an
>>> >> envelope
>>> >> point at the start and end of the track do what the user wants?
>>> >
>>> > If time tracks were accessible, I guess that would be the perfect
>>> > solution.
>>> > I think it would also be required that envelope points can be added,
>>> > removed and navigated, so that, for example, you can make the final 3
>>> > seconds of a track slow down.
>>> >
>>> >> If so, then there may be an argument that any available development
>>> >> time
>>> >> would be better spent working towards making the timeline keyboard
>>> >> accessible.
>>> >
>>> > A Nyquist plug-in is more likely to happen sooner.
>>> > I doubt that we will get accessible time line in Audacity 2.2.0,
>>> > though perhaps a good project for 2.2.1?
>>> >
>>> >>
>>> >>> Q. If available, would we want to ship it?
>>> >>> Q. The OP envisaged quite a simple interface with just two controls
>>> >>> -
>>> >>> start speed and end speed. That sounds good to me - how's that from
>>> >>> an
>>> >>> accessibility point of view?
>>> >>
>>> >>
>>> >> I can't see any problem with that,
>>> >
>>> > Thanks for your comments David. I'm encouraged to make this plug-in as
>>> > I think it will at least be a useful stop-gap until time tracks are
>>> > made accessible.
>>> >
>>> > Whether we ship it, or just have it on the wiki can be decided after
>>> > testing.
>>> >
>>> > Steve
>>> >
>>> >>
>>> >> David.
>>> >>>
>>> >>>
>>> >>> Steve
>>> >>
>>> >>
>>
>>
>>
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