Dirac Live 3.11 // 2024-11-11

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Delay alignment update: The delay compensation for speaker distance alignment has previously been slightly confusing in that the shown delay values have not corresponded exactly to the measured acoustic delay. This has been due to that part of the delay alignment was included as a pre-amble of zeros in the Dirac Live filter itself, leaving only the remaining part of the alignment to be applied outside of the Dirac Live filter. A consequence of this partitioning was that if the user manually disabled the delay alignment, then the part of the delay inside the Dirac Live filters would remain being applied, resulting in a misalignment of the speakers. The new delay values more consistently represent the compensation for actual speaker distance or latency.
Target curve update: We’re unifying how the advanced target curves (breakpoint) and simple target curves (high and low shelves) behave as input to the filter design. Under the hood, shelving targets will now be converted to breakpoint targets and follow the same filter design process.
We’re introducing improvements in our measurement functionality:

Microphone recording level: Different microphones have resulted in different recording levels between MacOS and Windows due to different gains being applied on the microphone hardware and on the OS (operating system). For example, the UMIK-1 with USB-C connector has experienced very low recording levels on MacOS. In order to make all microphones work on all OS:s, we’re now only applying gain adjustment within the Dirac Live application.
Improved error detection on all platforms: An improved algorithm for detection of missing samples in the measurement recording is introduced. This will generate significantly less false alarms about measurements being “imprecise” (showing an exclamation mark). The improved algorithm will always be applied, both when using microphones connected to the AVR/receiver device and to the PC/Mac.
Improved recording quality on Windows: The Windows WASAPI driver will be used in Exclusive Mode by default. Exclusive Mode significantly reduces the probability for losing samples during the recording. It is possible to opt-out of Exclusive Mode by setting the environment variable: DAUDIO_WASAPI_NON_EXCLUSIVE = ON

We’ve extended the local logging from the Dirac Live, including received notifications from the connected device, to improve problem traceability.
Dirac Live 3.11 has dropped support for MacOS 10 and now only works on MacOS 11 and up. The latest release that supports MacOS 10.14 is Dirac Live 3.9.7.

Bug fixes

We have fixed an issue that caused the mic gain slider to sometimes not being shown in the Volume Calibration page.
Sometimes, a persistent error, such as an unreachable network, could generate multiple error messages. We now avoid generating identical generic error messages.
The function to reset the frequency curtains works again.
The Dirac Live application could crash when selecting Bass Control for devices from Onkyo with recently updated firmware supporting Dirac Live Bass Control.

Known issues

Some users have reported that Dirac Live Bass Control does not work well on Onkyo TX-RZ50. We are investigating this together with Onkyo.
Filter export to devices from Onkyo/Integra/Pioneer take longer time than usual, but it eventually completes.
It is not possible to use the Qt installer maintenancetool to uninstall the Dirac Live application on Intel-based Macs running MacOS 15. Workaround: It is possible to install a newer version of Dirac Live without first uninstalling.

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