Dirac Live Beta 3.13.1 // 2025-02-14

Question

Accepted Answer

Changes listed are relative to the latest public stable release.

Features

ART support range sliders now take precedence over the detected range of a speaker. -In cases where there is no subwoofer used as support speaker, ART filter designs could sometimes result in undesirable magnitude boosts at frequencies between the speaker’s detected low cut-off and the user’s selected low end of the ART support range. -The workaround has been to manually adjust the advanced target curve to not “ask for” more bass than the available supporting speakers can provide. -The updated functionality will instead use the selected low end of the ART support range to limit, or contain, the magnitude boost applied by the ART filter design. Therefore, it will not longer be necessary to adjust the advanced target curve to achieve a “reasonable” ART filter design.
ART will set the default low end of the ART support range to the actually detected range instead of capping it at a minimum of 50 Hz for non-subwoofer speakers.
The LFE group in ART now uses a non-subwoofer speaker to define its time target.

ART utilizes the measured wavefront propagation of the main speaker in each microphone position to define the time target response for that channel.
For the LFE channel, ART utilized the first subwoofer in the LFE group as main speaker for the LFE channel. However, this has two drawbacks:

The main peak in a subwoofer’s impulse response can sometimes be difficult to detect. In cases where the detection has failed in one or more microphone positions, the resulting target may not represent a desired wavefront propagation.
When multiple subwoofers are used, then ART may “unfairly” assign too much power to the first subwoofer, due to its measured capability to contribute more effectively to attaining the target (which was defined by its measured response) than the other subwoofers.

The updated functionality will use a full-range speaker to define the time target for the LFE channel. -If there is a Center speaker, ART will try to identify it and use it as target. -If a Center speaker cannot be certainly identified, then ART will use either the Front Left or the Front Right speaker as target. -The advanced ART settings for the LFE channel group has a drop-down menu to let the user manually override the automatic selection.
When Dirac is handling bass management (BM, BC, ART), the LFE channel will always have a low-pass filter applied at 120 Hz. This is to comply with LFE channel handling requirements and be consistent with the Dirac Live Bass Control (DLBC) behaviour.
ART now supports the case where some speakers are excluded from supporting other speakers. However, they may still receive support from other speakers when they are enabled.

Bug fixes

Fixing a few issues related to measurements taken while an AVR was on an older firmware and using them for filter design and filter export to the same AVR with an upgraded firmware: -Dirac Live could crash when clicking the Bass Management filter design option. -Bass Control filter design could fail with a message “Malformed request”. -Filter export could fail with an error message “Failed filter export”.
Fixed an issue where Dirac Live could crash when calculating a Bass Control filter with a narrowband subwoofer.
Fixed an issue where Dirac Live could silently fail to load an older ART project, showing no measurements in the filter design page.
Reduced the time it takes to export a filter to Onkyo/Integra/Pioneer devices. This was more an optimisation than a bug fix.
Fixed an issue where an offer to upgrade a license to ART wasn’t shown when connected to a device supporting ART.
Adjusted the LFE low-pass filter cut-off frequency in Bass Control to be -3dB at 120Hz. It was previously erroneously set to -6dB at 120Hz.

Known issues

Processing progress percentage can in some situations jump backwards. This doesn’t indicate that there is a problem with the processing itself. It is only the calculation of the progress that needs fixing.
Windows installer not signed properly.

Downloads

Dirac Live