Introduction

Software version 1.0.0.40 is a software release for Lawo VSC

This software release package applies to the following products and applications:

  • Lawo VSC

Versions:

  • Lawo VSC Engine: 1.0.0.40
  • Lawo VSC HOME Service: 1.0.0.40
  • Audio Driver: 1.0.0.40
  • WIBU Codemeter: 8.10.6221.500


Current Version:

Lawo VSC 1.0.0.40

Release date: October 2nd 2025


Version History:

1.0.0.0  (October 07th 2024)

1.0.0.16 (February 28th 2025(

Software repository: Lawo Download Center

macOS Tahoe 26 is supported.

  • macOS 15.2 provides a Bugfix for the Audio Driver Kit, which increases the overall performance and is highly recommended to use.
  • When updating the Audio Driver a restart of the System is recommended.

No Audio after Sleep State

Since macOS 15.4 there is a possibility that audio is not handed over after a sleep state of the mac. This is currently under investigation and is related to the OS. Audio is shown within VSC, but not handed over to the application via the Audio Device. A restart is required.

Enhancements

Support of 256 Audio Channels

256 Channels are now available, when operating in 48 kHz 

Only works in 48 kHz in combination with four 64 Channels Streams in and out.

Improved PTP sync and followup message parsing

In certain situations, PTP sync and followup messages were not evaluated.

SSM Option within Menu

SSM (IGMP v3) can now be activated in the menu to send source IP in multicast join.

Reinit NICs

The engine does no longer require a restart, if NICs are plugged during runtime. Closing and Reopening the settings will refresh the available NICs.

Improved Logging

Several new logging options for detailed analysis.

Improved Sending of SAP and MDNS messages

Transmission behaviour has been optimized.

Improved Logging

Several new logging informations for detailed analysis.

Improved performance for Environment Loading and Saving

Changes

Environment XML file potentially to large

The XML files grew potentially to large, due to wrong and unnecessary entries.

Extended Ringbuffer

The Ringbuffer size has been increased, as it was potentially too small when operating in 96 kHz. 

This does not increase Latency.

Improved long-term stability

When operating 24/7, a chance was given for distorted audio after 55 to 60 hours. 

Potential high CPU Load

The CPU load was potentially high, when starting Applications interacting with VSC first and then VSC. 

Streams could not be send or received when using odd Streaming Ports

Streams have not been established, when using odd Ports.

SAP Hashes not unique 

Chance was given, that two streams used the SAP hash.


Enhancements

CPU Load added to Logfiles

The CPU Load of the system is now written to the Logfile every minute.

Enhanced clock drift precision

The clock drift precision for engine and audio driver was improved and optimized.

Changes

Possibility for a crash of the audio driver when using large buffer sizes

The audio driver could crash if used by an application with large buffer sizes above 30 milliseconds.

Possibility for noise when using large amount of crosspoints 

When using large amount of crosspoints, there was sometimes a chance that this would result in noise on the audio signals.

Using asymmetric configuration of Sender and Receivers could cause noise

When using Senders and Receivers were configured with different Sample per Frame or Stream Size values, it could result in noise on the audio signals.

Using 0 Channels for Send or Receive could result in a crash

VSC could crash on systems with Intel CPUs, if a Sender or Receiver was configured with 0 channels.

Information Pop Ups stopped working after updating to macOS 15.2

The small Information windows which pop up when hovering over the "I" stopped working after updating to macOS 15.2.

macOS Console showed lots of warnings after updating to macOS 15.2

After updating to macOS 15.2, the console would display warnings with the message "not allowed changes within view updates". 

Update of several Libraries

The software libraries used for the HOME Service were updated.




Compatibility

Lawo VSC Products are compatible with:

macOS Tahoe

macOS Sequioa

macOS Sonoma 



Support 

If you have any questions or require support during the update, please contact LAWO support.