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Using EQ Kill / Right Click Reset Introduces Pops + Clicks #7937
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Commented by: daschuer |
Commented by: daschuer The bug happens due to the special Lipshitz/Vanderkooy mix oft the two https://github.com/mixxxdj/mixxx/blob/master/src/effects/native/bessel8lvmixeqeffect.cpp For performance reasons we stop processing the not required filters. This The Linkwith-Riley type does not have the issue and works like you expect. I will have a look how we can fix this issue. |
Commented by: daniel-hams Thanks Daniel, Your explanation has made it clear why I'm seeing this. I'll keep the speculation out of any future submissions :-) |
Issue closed with status Fix Released. |
Reported by: daniel-hams
Date: 2015-04-01T12:17:05Z
Status: Fix Released
Importance: Medium
Launchpad Issue: lp1439160
Attachments: [Kill release noise](https://bugs.launchpad.net/bugs/1439160/+attachment/4363034/+files/Kill release noise)
OS: Arch Linux
CPU: Intel Core2 Quad Q6700, 2.66ghz,
Kernel: 3.19.2-1-ARCH, performance governor selected
Video HW: Nvidia with proprietary drivers
Sound HW: NVIDIA Corporation MCP55 High Definition Audio
Jack: jackdmp 1.9.10
Sound Setup: 48k, 1024 frames, 2 periods
Mixx Version 1.12.0-alpha x64 from 01/04/2015, build master r5315
Problem Description:
Using the EQ and the EQ kill switches introduces half-square waves under certain conditions that are evident as cross spectrum transients.
The issue is most evident with a source sound file containing only low frequency content.
Reproduction scenario:
Additional scenario last step:
Speculation:
Mixxx seems to have some signal cascade through the EQ stages - when (I believe) each of the EQ bands should be individually attenuated/amplified and re-mixed together. Using the Kill switches on a particular band should only ask for -INF attenuation rather than performing some kind of signal on/off or bypass to another cascaded EQ section.
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