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Dirac Live
Dirac Live Beta 3.13.9 // 2025-06-17
*Information within brackets is for internal tracking.
Bug fixes
Dirac Live versions later than 3.4.4 have sometimes shown inconsistency between the predicted Bass Control (BC) response and validation measurements made using 3rd party tools, such as REW, on some devices from the Arcam AV and AVR lines. An error was located in the Bass Control filter export procedure, causing some phase correction filters to be populated by default “flat” coefficients instead of the optimized ones. This fix enables use of the full DLBC topology and shows high consistency with properly made validation measurements. We recommend Arcam users with these devices to re-export their DLBC filter using this update. *(DS-1814)
We have fixed the problem where ART filters could not be exported for a 2.0.0 channel configuration. *(LIVE-4612)
An issue has been fixed where the default support speaker assignment in ART could include speakers that had been tagged as excluded from support. *(DS-1889)
However, there is still a known issue (see below) with the default support assignment in ART, but it’s not related to speakers being excluded from support.
Fix Dirac Live app crashing when returning to volume calibration after filter export. *(DS-1877)
Minor UI and app issues have been addressed and fixed. *(APP-510, APP-521, APP-540)
Features
ART support range is now constrained so that a speaker group cannot give support outside of its active range (the “self-support” range). If a channel group requires extended support below the supporting group’s active range, then the active range of the supporting group needs to be extended first. *(APP-221)
The detected range of a supporting speaker group is now highlighted in the Filter Design view when hovering over the support range slider. Right-clicking the slider will open an option to reset the support range to its default setting, which is the detected range. *(APP-496)
Updated packaging of Microsoft Visual C++ Redistributable to prevent corner case crashes. *(APP-529)
Updated handling for a single ART main speaker in a group to now allow editing of the support level. *(APP-545)
Known issues
ART default support speaker assignment can sometimes fail when running out of cross-terms, leaving some channel group without any support speakers assigned. When a channel group lacks supporting speakers, the user cannot proceed to Calculate the ART filter. *(APP-549)
There is a workaround, by manually assigning the missing support speakers, possibly after having relieved them from supporting another channel group. When all channel groups have some support speakers assigned, it will be possible to proceed to Calculate an ART filter.
Processing progress tracker percentage can in some situations jump backwards. This doesn’t have any practical implications and can be ignored. *(LIVE-4356)
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