We recently announced build 622 for Band-in-a-Box® 2019 users - this free update includes improved RealTracks generation:
Silent gaps between riffs are now filled when necessary, giving a more legato sound to instruments that need it. This feature is on by default, but can be disabled by unchecking "Automatically fill gaps between riffs" in the RealTracks Settings window. The setting can also just be disabled for individual RealTracks by going to the Soloist window > Edit > More... and unchecking "Fill riff gaps automatically".

Review and download our Band-in-a-Box® 2019 update patches at https://www.pgmusic.com/support_windowsupdates.htm
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PG Music Inc.