Bug 639 – Equalization: Slight changes to Graphic Sliders after running the effect

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Audacity 3.0.3 development began 19th April 2021

Audacity Bugzilla

Bug 639 - Equalization: Slight changes to Graphic Sliders after running the effect


Summary:	Equalization: Slight changes to Graphic Sliders after running the effect

Status:	RESOLVED FIXED

Product:	Audacity
Classification:	Unclassified
Component:	Built-in FX
Version:	2.0.4
Hardware:	Per OS All

Importance:	P5 RepeatableAll
Assigned To:	Default Assignee for New Bugs

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2013-04-24 14:49 UTC by Gale Andrews
Modified:	2019-05-26 09:58 UTC (History)
CC List:	4 users (show)

See Also:
Steps To Reproduce:	1) Open EQ in Graphic Mode, press "Flatten". 2) Set the sliders for 315, 400 and 500 Hz to -20 dB 3) Switch to Draw Curves then back to Graphic Mode. 4) observe: The 400 Hz slider has changed to -19.8 dB, which is expected due to limitations in Graphic Mode. 5) OK to apply the effect, reopen the effect. 6) Observe: The 400 Hz slider has gone back to -20 dB.
Release Note:
First Git SHA:
Group:	---
Workaround:
Closed:	2019-05-26 00:00:00

Flags:	petersampsonaudacity: Test‑OK‑Win+ petersampsonaudacity: Test‑OK‑Mac+

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Description Gale Andrews 2013-04-24 14:49:20 UTC

Similar can be seen when changing most sliders in Graphic Mode, applying the
effect then reopening. The sliders for very highest or very lowest frequencies
don't seem to be affected, but the others are.

If you move one slider to + or - 20 dB, apply EQ then reopen, move a second
slider near the other end of the scale to + or - 20 dB, apply EQ and reopen,
then the slider you first moved will often have incremented or decremented by
another 0.1 or 0.2 dB, so may now be + or - 19.7 or 19.6.

Comment 1 Peter Sampson 2019-05-26 09:53:47 UTC

Testing on W10 with audacity-2.3.3-alpha-252-88dc11f525215cea57f7a89b0038fc7d40a50149

At Step 3 the 500 Hz slider correctly remains at -20db

Comment 2 Peter Sampson 2019-05-26 09:56:58 UTC

Testing on 2,3,2 on macOS 10.15.5

I don't get hovertext tooltips so it's difficult to accurately judge - but on return to graphic mode the 500Hz slider looks fully at the bottom and the curve looks kosher.

Comment 3 Peter Sampson 2019-05-26 09:58:35 UTC

I'm going to close this a RESOLVED

When we fix the EQ split into the two modes Graphic and Draw separate effects (probably for 2.3.3) this problem should disappear anyway