From 435b1075faa360ae56d00d57988996c590049835 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rn=20Nettingsmeier?= Date: Mon, 3 Feb 2014 18:05:57 +0100 Subject: [PATCH] update panning articles (sandbox for improved semantic markup). --- .../17_mixing/02_panning/01_mono_panner.html | 6 ++-- .../02_panning/02_balance_control.html | 8 ++--- .../02_panning/03_stereo_panner.html | 31 +++++++++---------- .../17_mixing/02_panning/04_vbap_panner.html | 20 ++++++------ 4 files changed, 31 insertions(+), 34 deletions(-) diff --git a/_manual/17_mixing/02_panning/01_mono_panner.html b/_manual/17_mixing/02_panning/01_mono_panner.html index 58f14ae6..f5df157b 100644 --- a/_manual/17_mixing/02_panning/01_mono_panner.html +++ b/_manual/17_mixing/02_panning/01_mono_panner.html @@ -13,15 +13,13 @@ default setting is "center" (L=50%, R=50%). image of the mono panner -
-

+

The mono panner looks a quite similar to the stereo panner interface. The difference is that the L/R labels in the lower half of the mono panner do not move because there is no "width" to control.

-

Using the mouse

@@ -58,7 +56,7 @@ keybindings are available to operate on that panner:
← / ←
move position 1° / 5° to the left
→ / →
-
move position 1° / 5° to the right
+
move position 1° / 5° to the right
0
reset position to center
diff --git a/_manual/17_mixing/02_panning/02_balance_control.html b/_manual/17_mixing/02_panning/02_balance_control.html index 3c2f838f..b7358093 100644 --- a/_manual/17_mixing/02_panning/02_balance_control.html +++ b/_manual/17_mixing/02_panning/02_balance_control.html @@ -4,8 +4,8 @@ title: Balance Control ---

- For stereo tracks, you can now switch between the stereo panner and a - traditional balance control by right-clicking on the + For stereo tracks, you can now switch between the default stereo panner + and a traditional balance control by right-clicking on the panner widget.

Stereo Balance @@ -15,8 +15,8 @@ control Moving it to one side will linearly attenuate the signal of the opposite side.

-
+

While the balance control is considerably less flexible than the stereo panner, it works with arbitrary content without danger of introducing comb filter artefacts. -

+

diff --git a/_manual/17_mixing/02_panning/03_stereo_panner.html b/_manual/17_mixing/02_panning/03_stereo_panner.html index 97957833..30492f64 100644 --- a/_manual/17_mixing/02_panning/03_stereo_panner.html +++ b/_manual/17_mixing/02_panning/03_stereo_panner.html @@ -4,29 +4,28 @@ title: Stereo Panner ---

- The default stereo panner distributes two inputs to two outputs. Its - behaviour is controlled by two parameters, width and - position. The - default settings for the stereo panner are width=100% and - position=center. + The default stereo panner distributes two inputs to two outputs. Its + behaviour is controlled by two parameters, width and + position. The + default settings for the stereo panner are width=100% and + position=center. This stereo panner assumes that the signals you wish to distribute are either uncorrelated (i.e. totally independent), or that they contain a stereo image which is mono-compatible, such as a co-incident microphone recording, or a sound stage that has been created with pan pots.*

-
+

With the default values it is not possible to alter the position, since the width is already spread entirely across both outputs. To alter the position, you must first reduce the width. -

+

Stereo Panner User Interface

-

- The panner user interface consists of three elements, divided between + The panner user interface consists of three elements, divided between the top and bottom half. Click and/or drag in the top half to control position; click and/or drag in the bottom half to control width (see below for details). @@ -56,8 +55,8 @@ title: Stereo Panner

Although the implementation of the panner uses the "position" - parameter, when the user interface displays it numerically, it shows a pair of numbers that - will be familiar to most audio engineers. + parameter, when the user interface displays it numerically, it shows + a pair of numbers that will be familiar to most audio engineers.

@@ -194,13 +193,13 @@ title: Stereo Panner

Stereo panning caveats

-
+

The stereo panner will introduce unwanted side effects on material that includes a time difference between the channels, such as A/B, ORTF or NOS microphone recordings, or delay-panned mixes.
When you reduce the with, you are effectively summing two highly -correlated signals with a delay, which will cause comb filtering. -

+correlated signals with a delay, which will cause comb filtering. +

Let's take a closer look at what happens when you record a source at 45° to the right side with an ORTF stereo microphone array and then manipulate the width. @@ -243,10 +242,10 @@ inside your signal chain, this spatial separation is lost and the brain will no longer be able to sort out the timbral mess. As usual, you get to keep the pieces.

-
+

Depending on your material and on how much you need to manipulate the width, some degree of comb filtering may be acceptable. Then again, it may not. Listen carefully for artefacts if you manipulate unknown stereo signals — many orchestra sample libraries for example do contain time-delay components. -

+

diff --git a/_manual/17_mixing/02_panning/04_vbap_panner.html b/_manual/17_mixing/02_panning/04_vbap_panner.html index a11c8f3c..9703f882 100644 --- a/_manual/17_mixing/02_panning/04_vbap_panner.html +++ b/_manual/17_mixing/02_panning/04_vbap_panner.html @@ -3,13 +3,13 @@ layout: default title: VBAP Panner --- -
+

Ardour's VBAP panner is currently in development, and its semantics may change in the near future, possibly affecting your mixes. Please do not rely on it for important production work while the dust settles. -

+

- VBAP is short for Vector-base Amplitude Panning, + VBAP is short for Vector-base Amplitude Panning, a versatile and straightforward method to pan a source around on an arbitrary number of speakers on a horizontal polygon or a 3D surface, even if the speaker @@ -39,21 +39,21 @@ title: VBAP Panner above.

- A horizontal VBAP panner has one parameter, the azimuth - angle. A 3D panner offers an additional elevation - angle control. + A horizontal VBAP panner has one parameter, the azimuth + angle. A 3D panner offers an additional elevation + angle control.

-
+

More elaborate implementations of VBAP also include a - spread parameter, which will distribute the signal over a + spread parameter, which will distribute the signal over a greater number of speakers in order to maintain constant (but no longer maximal) sharpness, regardless of position. Ardour's VBAP panner does not currently include this feature. -

+

Speaker layout

- Each VBAP panner is specific to its speaker layout + Each VBAP panner is specific to its speaker layout — the panner has to "know" about the precise location of all the speakers. A complete VBAP implementation must therefore include the possibility to define this