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Elastic Beatgrids
This page groups info relevant to tracks with multiple BPMs.
* Mapping commands: mixxxcontrols?#master * Manual (Preferences): https://www.mixxx.org/manual/latest/en/chapters/preferences.html?highlight=analyse#beat-detection * Forum post: https://www.mixxx.org/forums/viewtopic.php?f=3&t=11629 * GSOC project 2020: measures_downbeats_bars_and_phrases * GSOC project 2018: gsoc2018ideas?#beatgrid_enhancements * Zulip Chat: https://mixxx.zulipchat.com/#narrow/stream/109171-development/topic/Rhythm.20Detector * Serato Comparison: here
There are two types of tracks that have multiple BPMs: * a) Unsteady BPMs:
- Definition: these tracks floats around a single BPM (+-1% range). Examples:
- Live drummers: Guns N' Roses - Sweet Child O' Mine
- Old disco / 80s Pop tracks: Matia Bazar - Ti Sento
* b) Transition Tracks:
- Definition: these tracks have clear BPM changes (+-10% range). Examples:
- Abrupt 85->115 bpm: Magic Drum Orchestra - Drop it like its Hot
- Smooth 126->98 bpm: Planet Soul - Set me Free
"Elastic beatgrids" is a feature that explicitly allows multiple BPMs in each track.
Without elastic beatgrids, the following becomes impossible to perform without the audience noticing: * Beatjumps:
- Impossible to fix in advance because the jump happens instantaneously
* FX BPM-synced effects: (eg delay)
- Impossible to fix in any situation, because FX fully depend on the beatgrid
* AutoLoops:
- IN point: with quantize off, you have to enable the loop at precisely the right time
- OUT point: In this case you have to immediately enter "loop out adjust mode" to fix the out point as fast as you can
* Sync beatmatch:
- In this case you HAVE to compensate continuously using the jogwheels on the whole transition (manual beatmatch)
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