Bug 635 – Log interpolation no-alias square wave Chirp generates silence

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Audacity 3.0.3 development began 19th April 2021

Audacity Bugzilla

Bug 635 - Log interpolation no-alias square wave Chirp generates silence


Summary:	Log interpolation no-alias square wave Chirp generates silence

Status:	RESOLVED FIXED

Product:	Audacity
Classification:	Unclassified
Component:	Other
Version:	unspecified
Hardware:	PC All

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

URL:
Keywords:	patch_ready

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2013-04-10 13:57 UTC by Steve Daulton
Modified:	2018-08-20 11:45 UTC (History)
CC List:	5 users (show)

See Also:
Steps To Reproduce:
Release Note:
First Git SHA:
Group:	---
Workaround:
Closed:	2018-08-20 00:00:00

Attachments
Add no-alias waveform to logarithmic interpolation (2.01 KB, patch) 2013-04-10 20:29 UTC, Steve Daulton	Details \| Diff
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Description Steve Daulton 2013-04-10 13:57:32 UTC

Generate menu > Chirp.
If "Square, no alias" is selected as the waveform and "Logarithmic" selected as the interpolation, the result is silence.

Comment 1 Steve Daulton 2013-04-10 20:29:24 UTC

Created attachment 371 [details]
Add no-alias waveform to logarithmic interpolation

I may be missing something, but to my (possibly naive eye) it looks like someone just forgot to add the no-alias waveform to the logarithmic interpolation. (?)

Patch tested on Linux and it appears to work as expected.

Comment 2 Gale Andrews 2013-04-12 16:58:30 UTC

Thanks, Steve. Compiles and tests OK for me on Windows (I tested all eight combinations of waveform and interpolation). 

Marked "patch_ready".

Comment 3 Michael Chinen 2013-05-19 06:11:21 UTC

Patch applied in r12332, refactored in r12333.  Tested on 8 cases and 0 delta, and 0 freq (which defaults to 1)

Comment 4 Gale Andrews 2013-05-21 06:46:18 UTC

RESOLVED - FIXED. Tested different combinations and different sample rates on the three platforms.