Hi David
I have now had a more detailed play with scrubbing. In summary, I love it. I
had not bothered with zooming previously, but control-1, control-2 and
control-3 allow effective adjustment of scrubbing speed. While I am primarily
interested in scrubbing at slow speed, there are situations where high speed
would be useful. The following is by way of interest rather than concern.
when scrubbing backwards while zoomed right in on a recording done with a mono
microphone on a stereo track, sound is stronger through the right channel.
When scrubbing forwards the sound moves to the left channel. This does not
happen at higher speeds. Again, I do not regard it as a problem.
One of my uses of scrubbing is to locate precisely points before and after
something to be deleted. I therefore had some initial concern about scrubbing
cancelling selection. The solution is to use clips instead of selecting.
Pleasingly, keys shift-f5 through shift-f8 behave the same for clips as for a
selection. As a bytheway, those keys were not defined in the dev version but
will presumably be reinstated before release.
Once again, I regard keyboard access to scrubbing as a very significant
inclusion into Audacity. While we had some debate about using arrow keys, I am
more than comfortable with this implementation. While different to other DAWs,
I suspect most people will be able to adjust.
Andrew
From: audacity4blind-bounce@xxxxxxxxxxxxx <audacity4blind-bounce@xxxxxxxxxxxxx>
On Behalf Of David Bailes
Sent: Monday, 20 January 2020 8:29 PM
To: audacity4blind@xxxxxxxxxxxxx
Subject: [audacity4blind] Scrubbing using the keyboard
Hi,
there's now a version of scrubbing using the keyboard in the development
version of Audacity, if anyone wants to have a play with it. Note that this is
a development version, and it's not recommended for normal use.
There's a zip file, available here:
https://github.com/audacity/audacity/suites/409383387/artifacts/1220464
The zip file contains another zip file, which contains the portable version of
audacity. Unfortunately this double zipping happens with the current automatic
build scheme being used.
The details of the user interface are given below, and are similar to the
original proposal, with one or two minor changes. For using scrubbing to
position the cursor, you'll get the most accurate results on Windows using the
Wasapi host.
- There are two new commands: Scrub Backwards and Scrub Forwards.
- These commands appear on the Transport sub menu of the Extra menu.
- The commands have default shortcuts U and I, and are in the standard default
set.
- After pressing one of the two keys, playback continues until the key is
released.
- Playback starts from the cursor position, or the start of a time selection if
there is one.
- The speed of playback is determined by the zoom level. If the zoom level is
normal, then the playback speed is one half of the normal playback speed.
Zooming in (Ctrl + 1), halves the playback speed, and zooming out (Ctrl + 3)
doubles the playback speed. There are minimum and maximum playback speeds of
one sixteenth, and three respectively.
- You can scrub to the end of the audio, even if there is an initial selection.
In other words, scrubbing forwards does not automatically stop at the end of
the selection.
- Normally, when one of the keys is released, the position of the cursor is set
to the time when the key was released.
- If during the time one of the keys is pressed the left bracket and or right
bracket keys are pressed to set the start and/or end of the selection, then
when the scrubbing key is released, the change to the selection made by
pressing the bracket keys is preserved - the position of the cursor is not set
to the time when the key was released.
- If you hold down one of the scrubbing keys, and then press the other
scrubbing key before releasing the other key, then scrubbing continues in the
opposite direction, and does not stop when the original key is released.
David.
