disguise Audio advisory
Issue:
Audio clicking or popping and audio drifting out of sync with video under heavy load
Affected machines:
This is a software issue, so is apparent on all disguise servers
Background:With release 15.1 we have refactored the way we deal with audio. Unfortunately, this has
given rise to some audio issues which we are currently trying to resolve
What the issues are:
In 15.1 onwards, you may experience:a) audio clicking or popping during playback
Release 15.1.4 has some fixes to address this and reduces the chances of this occurring.
Additionally, the workarounds below reduce the occurence of audio clicking or popping
to zero in our current testing. However, we recognise that the structure andimplementation of the audio refactor still has some work to go as audio clicking may still
be prevalent on higher frequency soundsb) audio drifting out of sync with video under heavy load
Under heavy load, when perhaps frames are starting to drop, the audio may drift out ofsync with the video. This requires major work and has not yet been satisfactorily
addressed other than to optimise the project and reduce system load
Options:If your show is audio critical, there are some options:
1) Stay on the latest version
If you are not affected by heavy load, the best option would be to sequence your show on
the latest version (15.1.5 can be ​downloaded from here​) as this has some fixes andworkarounds to address the clicking and popping. That way, projects can run on thelatest version and enjoy all the features, improvements, fixes and patches deployed from
15.1 onwards
Note: projects created in later releases cannot be opened in earlier versions of thesoftware. In this specific example, once a project has been created on 15.1.x, you will not
be able to go back to 15.0.6 - the last version before the audio refactor - or anythingearlier than that

2) Revert to the last release prior to the audio refactor
If your show is audio critical and neither the latest build nor the workarounds help you,then there is the option of sequencing in the last version before the audio refactor
Release 15.0.6, build 52148 does not contain the audio issues described above and canbe ​downloaded from here
Note: this build does not contain the cumulative series of fixes, improvements andpatches implemented to date in r15.1.x. For a quick view of the changes enacted since
15.0.6, see the ​What’s new in r15​ section of the ​User Guide​. Full changelogs can beviewed in the ​Previous versions section​ of the ​download page3) Downgrade your 15.1.x project to 15.0.7
If you have already sequenced your project in 15.1.x and want to downgrade the projectto an earlier release prior to the audio issues, there is a special version of 15.0.7 toaccommodate this. Notes:-Only downgrades ​from​ releases r15.1.0 - r15.1.9 ​to​ r15.0.7
Audio mappings will need to be repatched
Upgrade back to r15.1 should be possible, but ​not​ to another r15.0 release

Version ​15.0.7 can be downloaded from here
Workaround:In our current testing, the following workarounds have reduced the audio popping to zero
(though note this is still ongoing, and we have seen the potential in the code for poppingat high frequencies)-reduce the volume of the audio. We are noticing that our interaction with drivers
adds volume which can result in clicking
use WASAPI instead of ASIO. The prevalence of clicking is more pronounced onASIOedit the Hammerfall settings to reduce the Output Level (see screengrab below)

Please contact support@disguise.one for feedback and issues