Bug 521 – Lower half of Waveform (dB) vertical scale does not show dB level.

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Audacity 3.0.3 development began 19th April 2021

Audacity Bugzilla

Bug 521 - Lower half of Waveform (dB) vertical scale does not show dB level.


Summary:	Lower half of Waveform (dB) vertical scale does not show dB level.

Status:	RESOLVED FIXED

Product:	Audacity
Classification:	Unclassified
Component:	User Interface
Version:	unspecified
Hardware:	PC All

Importance:	P4 RepeatableAll
Assigned To:	Default Assignee for New Bugs

URL:
Keywords:

Depends on:
Blocks:
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Reported:	2012-06-05 21:30 UTC by Steve Daulton
Modified:	2020-01-20 06:40 UTC (History)
CC List:	5 users (show)

See Also:	2277
Steps To Reproduce:	Generate a few seconds of a tone with a fairly high amplitude (eg 0.8) Switch to Waveform (dB) view. Zoom in vertically on the bottom of the waveform The vertical scale does not update correctly.
Release Note:
First Git SHA:
Group:	---
Workaround:
Closed:	2018-08-20 00:00:00

Flags:	stevethefiddle: Test‑OK‑Lin+

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Description Steve Daulton 2012-06-05 21:30:36 UTC

Zooming in on the lower half of the waveform in Waveform (dB) view displays an incorrect dB scale.

This is a regression against version 1.3.4


Ideally the vertical scale should display dB both above and below -inf.

Comment 1 Steve Daulton 2014-11-24 07:02:58 UTC

The behaviour is now different in Audacity 2.0.7 alpha (Linux).

Zooming in on the negative part of the waveform now causes the vertical ruler to collapse with no numbers shown. I've not tested on other platforms.

Updated bug title.

Comment 2 James Crook 2018-03-24 16:59:57 UTC

DEVEL - FIX MADE
https://github.com/audacity/audacity/commit/8ce8e7bcce24bd5a000031ee94f66517f16e244e

Comment 3 Steve Daulton 2018-03-24 17:26:41 UTC

Looks good on Linux.

Comment 4 Peter Sampson 2018-03-26 06:58:03 UTC

(In reply to Steve Daulton from comment #3)
Testing on W10 2-3-0 20180325-96
and on macOS 10.13.3 High Sierra on  audacity-macos-nightly-2.3.0-afe09bb.dmg - 28.43 MB | version: 2.3.0--26Mar18

Looks good on Mac an Windows too - also tested on 2/2/2 to compare the difference