HenryV Posted November 2, 2020 Share Posted November 2, 2020 Since there appears to be a problem with uploading this reply to a user experiencing a problem it is being posted as a new topic. If you are not using the AppleALC kext to modify the stock AppleHDA, consider doing so. The VoodooHDA kext has volume limitations and with AppleALC method your audio output is automatically detected in Big Sur, if you intend to upgrade from Catalina. If you are using VoodooHDA and any other related helper kexts remove them and make sure your AppleHDA is the stock version for your release. Download and install ProperTree from github to edit your config.plist. If you run linux open a terminal and enter lspci -k to see your pci configuration. Add AppleALC kext to the kernel section of Open Core's config.plist. Make sure AppleALC is in the OC kexts folder. Make sure to enter the correct layout-id and related information in the Open Core DeviceProperties PciRoot key for your audio. Verify if components are working in System Properties audio panel. 1 Quote Link to comment Share on other sites More sharing options...
swanduron Posted November 7, 2020 Share Posted November 7, 2020 AppleALC has much better audio quality than VoodooHDA. Some scenes, VoodooHDA is easy to use and can avoid some troubles such as stuck booting on injecting layout id during IRQ duplication. As one sentence, use AppleALC as much as possible. Quote Link to comment Share on other sites More sharing options...
Rodion2010 Posted April 26, 2021 Share Posted April 26, 2021 On 11/7/2020 at 3:47 PM, swanduron said: AppleALC has much better audio quality than VoodooHDA. can you confirm this with some tests and measurements? or is this just your personal opinion? I did these tests with RMAA6 https://audio.rightmark.org/index_new.shtml and quality is exactly the same, the difference is far beyond the possibilities of average hearing and the mid class acoustics maybe you are speaking about HiEnd tube amplifiers with gold cables and $100000 prices? https://applelife.ru/threads/applehda-voodoohda-testy-kachestvo-zvuka.1220310/ no one found any difference between the audio files recorded from AppleHDA and VoodooHDA output Quote Link to comment Share on other sites More sharing options...
Slice Posted April 26, 2021 Share Posted April 26, 2021 On 11/7/2020 at 4:47 PM, swanduron said: AppleALC has much better audio quality than VoodooHDA. Some scenes, VoodooHDA is easy to use and can avoid some troubles such as stuck booting on injecting layout id during IRQ duplication. As one sentence, use AppleALC as much as possible. Several years ago it was true. Not now. It's a pity the myth is alive. Quote Link to comment Share on other sites More sharing options...
wern apfel Posted May 1, 2021 Share Posted May 1, 2021 With VoodooHDA you might encounter some issues on some computers, if so, it might sound different. But in general is sounds like AppleALC/HDA except the ALC patch uses DSP and you like it as it sounds with DSP. This is probably why in some cases ALC/HDA seems to sound better. Quote Link to comment Share on other sites More sharing options...
Slice Posted May 1, 2021 Share Posted May 1, 2021 I prefer the sound without predistortion by DSP. 1 Quote Link to comment Share on other sites More sharing options...
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