Virtual Audio Cable


Version 4.14 (30.05.14)

  • Fixed a bug caused playback at higher speed.
  • Added a workaround for PortCls bug (GetMaxMapRegisters function) causing position freezing.
  • Fixed a bug caused signal level to be painted over the header in Control Panel application.
  • Added stream buffer control to minimize overflows/underflows.
  • Added button to restart System Audio Engine.
  • Now filter volume/mute nodes always report 8-channel support.

Version 4.13 (23.07.13)

  • Fixed a bug preventing stream buffer watermark parameters from being loaded on restart.
  • Fixed bugs causing integer divide overflows in Audio Repeater (both MME and KS versions).
  • Added a workaround for PortCls bug causing BSOD (bugchecks 0x50 or 0xD6) in GetMaxMapRegisters function if Driver Verifier with the special pool is used for VAC driver verification.
  • Added peak signal level indicators to Control Panel.
  • Changed signal level indication in Audio Repeater from average to peak.
  • Fixed stream position timestamp error if PortCls is not used (occurred in Open Broadcaster Software).
  • Added a feature to control playback pin type (speaker or line out).
  • Fixed sleep/hibernate problems.
  • Added master volume control.

Version 4.12 (01.04.12)

  • Fixed RtAudio buffer processing bug in Audio Repeater KS.
  • Added clock rate display to Audio Repeater.
  • Changed number of worker threads limit to a number of logical CPUs.

Version 4.11 (11.03.12)

  • Added cable multi-selection feature to Control Panel.
  • Clock correction precision increased to 0.0000001% (1E-8%).
  • Added volume boost feature.
  • Fixed sampling rate change bug caused incorrect playback speed.
  • Rewritten data processing code from DPC to system thread set to minimize interlocked waiting and improve performance on multi-CPU/core systems.
  • Added stream buffer watermark control feature to improve stream stability.
  • Added "Reset counters" buttons (Control Panel) to reset cable/driver counters.
  • Minimum possible sampling rate increased from 200 to 1000.
  • Fixed a bug in KS Audio Repeater (device name string length was limited to 31 chars as in MME version).
  • Optimized KS Audio Repeater algorithms for more reliable transfer.
  • Added a feature to Audio Repeater: now command-line options can specify device number instead of its name to avoid name collisions if several adapters of the same type coexists.
  • Added several channel mixing/distribution schemes.
  • Added channel scatter/gather mode and cable channel mixing control.
  • Increased clock correction precision (registry value format is changed).
  • Added a privilege elevation manifest to Setup application to elevate privileges automatically.
  • Maximum sampling rate changed from 1000000 to 384000 in accordance with MS requirements.
  • Add "already installed" warning to Setup application.
  • Fixed some node property errors.
  • Fixed some minor bugs.

Version 4.10 (15.02.10)

  • Added IPrefetchOffset interface support (more stable audio in XP/Vista/Server 2008/Win7).
  • Added a workaround to avoid Skype freezing and to stabilize streaming in heavy load cases.
  • Changed voice reminder policy in trial version.
  • Added tray icon support to Audio Repeater.
  • Added Kernel Streaming version of Audio Repeater.
  • Added Wikipedia references in the user manual.
  • Fixed some bugs in volume control code.
  • Fixed a bug caused timer resolution restoration when a last cable stream was closed.
  • Added timer resolution correction on return from standby.
  • Added load splitting among CPUs/cores.
  • Added Authenticode digital signature from NTONYX.
  • Added instance closing feature to Audio Repeater.

Version 4.09 (11.06.08)

  • Fixed a bug caused system crash in case of incorrect volume settings.
  • Now multichannel nodes are exposed correctly (individual sliders instead of the Pan slider).
  • Fixed a bug caused break instruction crash (0x80000003) on a floating point format query.
  • Fixed a bug caused system crash in low memory situation.
  • Added a test signature to 64-bit driver module.
  • Increased average time interval between voice reminders in trial version.
  • Increased clock correction precision in Control Panel to 1/1000th of a percent.

Version 4.08 (14.09.07)

  • Clock correction amount is now represented and specified in percent values.
  • Changed clock correction algorithm to increase sampling rate precision.
  • Fixed a bug in the INF file that prevented Virtual Cables from being used via KS Proxy (for example, as a DirectShow WDM filter).
  • Fixed a bug in format checking code that limited number of channels to 2 under Vista.

Version 4.07 (28.06.07)

  • Removed another debug break instruction caused a bugcheck in rare cases.

Version 4.06 (15.05.07)

  • Fixed installer bug caused the driver to stay disabled after installation.
  • Removed a debug break instruction caused a bugcheck in rare cases.

Version 4.05 (12.05.07)

  • Added a clock correction feature.
  • Added configuration options for source line set (affects endpoint creation in Vista).
  • Changed service name in INF file to eliminate conflicts with VAC 3.
  • Added more correct multi-channel support under Vista.
  • Added a workaround for Vista portcls.sys bug (a miniport stream can be destructed without been stopped).
  • Removed the "Mic" source line (capture endpoint in Vista) from the default source line set.
  • Changed "Milliseconds per interrupt" default value to 7 to improve DirectSound stability.
  • Improved stream stability on short buffering times.
  • Changed the Control Panel interface.

Version 4.04 (31.12.06)

  • Fixed a bug in topology description (fake recording controls were not accessible).
  • Fixed some synchronization bugs (the system hangs while several cables are heavily used).
  • Added a pitch (frequency) shifting support.
  • Added a limited Vista support.

Version 4.03 (16.07.06)

  • Fixed a bug that caused change of signal pitch. This issue was previously considered as DirectSound bug and was described in FAQ section related to speech engines. This section has been removed from the FAQ.

Version 4.02 (22.05.06)

  • Added 64-bit binaries.
  • Some minor corrections.

Version 4.01 (24.03.06)

  • Fixed some bugs.
  • Changed default stream format limiting mode to the "Cable range".

Version 4.00 final release (06.03.06)

  • Fixed some bugs.
  • Added volume control features.

Version 4.00 beta 6 (27.02.06)

  • Fixed some bugs.
  • Added format conversion and stream format limiting features.

Version 4.00 beta 5 (16.12.05)

  • Fixed some bugs.
  • Added a manual file.
  • Installer/uninstaller improvements (administrator rights check, uninstallation entry creation in Add/Remove Programs).

Version 4.00 beta 4 (18.08.05)

  • Fixed some bugs.

Version 4.00 beta 3 (23.07.05)

  • Fixed some bugs.
  • Added installer/uninstaller.

Version 4.00 beta 2 (15.07.05)

  • Fixed some bugs.
  • Added Control Panel application is available.

Version 4.00 beta 1 (07.06.05)

  • First beta release (without an installer).