TripleOscillator with hi-pass produces different output depending on the export settings
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- Dominant language
- C++
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Description
Either TripleOscillator's noise generator or the Hi-pass filter has a bug, causing the exported file to sound differently with different export settings, which even includes whether you use the graphical interface or the command line.
I made a project file on which the problem comes out very clearly, and exported it with a few different settings, using both gui and cli. The interpolation was "sincmedium" on every file.
[Here is the project and the exported wav files.](https://github.com/LMMS/lmms/files/5460024/noise-filter-export.tar.gz)
Affected versions: current master and most probably 1.2.2 too.
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First steps
- Read the whole issue, then the project's contributing guide.
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Research direction
Download the linked noise-filter-export.tar.gz project and WAV files, then reproduce the differing results with the same sincmedium interpolation through both the graphical interface and command line. Compare the TripleOscillator noise generator and Hi-pass filter behavior to isolate the source; done means equivalent export settings produce consistent audio output.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- audio-video-rtc
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100