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Historically, the PeakController has had issues like attack/decay knobs acting like on/off switches, and audio artifacts like buzzing or clicking. This patch aims to address those issues. The PeakController previously used lerp (linear interpolation) when looping through the sample buffer, which was in updateValueBuffer. This lerp utilized attack/decay values from control knobs. This is not the correct place to utilize attack/decay because the only temporal data available to the function is the frame and sample size. Therefore the coefficient should simply be the sample rate instead. Between each sample, processImpl would set m_lastSample to the RMS without any sort of lerp. This resulted in m_lastSample producing stair-like patterns over time, rather than a smooth line. For context, m_lastSample is used to set the value of whatever is connected to the PeakController. The basic lerp formula is: m_lastSample = m_lastSample + ((1 - attack) * (RMS - m_lastSample)) This is useful because an attack of 0 sets m_lastSample to RMS, whereas an attack of 1 would set m_lastSample to m_lastSample. This means our attack/decay knobs can be used on a range from "snap to the next value immediately" to "never stray from the last value". * Remove attack/decay from PeakController frame lerp. * Set frame lerp coefficient to 100.0 / sample_rate to fix buzzing. * Add lerp between samples for PeakController to fix stairstep bug. * The newly added lerp utilizes (1 - attack or decay) as the coefficient, which means the knobs actually do something now.
LMMS
What is LMMS?
LMMS is a free cross-platform alternative to commercial programs like FL Studio®, which allow you to produce music with your computer. This includes the creation of melodies and beats, the synthesis and mixing of sounds, and arranging of samples. You can have fun with your MIDI-keyboard and much more; all in a user-friendly and modern interface.
Homepage
Downloads/Releases
Developer Wiki
Artist & User Wiki/Documentation
Sound Demos
LMMS Sharing Platform Share your songs!
Features
- Song-Editor for composing songs
- Pattern-Editor for creating beats and patterns
- An easy-to-use Piano-Roll for editing patterns and melodies
- A Mixer with unlimited mixer channels and arbitrary number of effects
- Many powerful instrument and effect-plugins out of the box
- Full user-defined track-based automation and computer-controlled automation sources
- Compatible with many standards such as SoundFont2, VST(i), LADSPA, GUS Patches, and full MIDI support
- MIDI file importing and exporting
Building
See Compiling LMMS on our wiki for information on how to build LMMS.
Join LMMS-development
If you are interested in LMMS, its programming, artwork, testing, writing demo songs, (and improving this README...) or something like that, you're welcome to participate in the development of LMMS!
Information about what you can do and how can be found in the wiki.
Before coding a new big feature, please always file an issue for your idea and suggestions about your feature and about the intended implementation on GitHub, or ask in one of the tech channels on Discord and wait for replies! Maybe there are different ideas, improvements, or hints, or maybe your feature is not welcome/needed at the moment.