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Download kX Project Audio Driver 5. 64-bit (Sound Card). Current stable version is 37.0 (December, 2020). See release notes. We detected your operating system as Windows 64-bit. Recommended download is UGENE for Windows.
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Here you can download two VAC versions: fully-functional trial version, and feature-limited Lite version.
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Trial version can be used anywhere to evaluate product functionality. After 30 minutes, female voice starts to remind that this is only a trial. Otherwise, there is no functionality restriction compared to the full version.
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If this new version works not as described, try the last knowingly stable version 4.64: self-installing EXE or ZIP archive.
Lite version can be used only in a private home environment not associated with income generation. Here is a feature comparison table:
Feature | Lite version | Trial/full versions |
Maximum number of Virtual Cables | 1 | 256 |
Maximum sampling rate | 48000 | 384000 |
Maximum bits per sample | 16 | 32 |
Maximum number of channels | 2 | 32 |
Minimum milliseconds per event | 3 | 1 |
Maximum number of worker threads | 1 | 32 |
Maximum number of clients | 1 | Unlimited |
Multi-client support | No | Yes |
Stream format limiting support | No | Yes |
Channel remapping support | No | Yes |
Microphone and S/PDIF type lines | No | Yes |
Position and clock register support | No | Yes |
Cost | Free | 15-50 USD |
Usage policy | Home only | Home/business |
Technical support | Bugs only | Full support |

The easiest way to open the user manual is to click the 'Help' button in the first installation dialog, or in VAC Control Panel window (if already installed).
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Important things
- If recording/input endpoints are inaccessible in Windows 10, make sure that Microphone access is not disabled in Windows Settings - Privacy - Microphone.
- If some application that use Kernel Streaming (KS) interface cannot see and/or access VAC pins (devices), try to switch Virtual Cable's port type from WaveRT (the default) to WavePci or WaveCyclic.
- If the exclamation point icon is displayed on the left of Virtual Cable row in VAC Control Panel, please check driver's log and follow the suggestions to avoid audio interruptions and/or artifacts.
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In case of downloading a ZIP archive, just extract the contents into an empty folder and run 'setup' file for installation. Please read the 'readme' file from the package for additional details.
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All version packages contains the same fully-functional Audio Repeater binaries. Audio Repeater applications can be used freely and independently from VAC product.
