Changing output sample rate of AES card in R20

  • Published on May 27, 2026
  • 1 minute(s) read
  • Bryan Jones
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Scope

This document applies to bot the Z/IP Stream R/2 and R/20.

Important Notice!

The backend interface of Z/IPStream R/2 and R/20 systems is password protected for a reason and is not intended for normal customer use. There should be no need to modify settings through this interface.

If access is granted upon request, any changes made are the responsibility of the user. Problems caused by backend modifications—including misconfiguration, service interruption, software instability, or system damage—are not covered under warranty or standard support.

Accessing the Lynx Mixer

  1. Log into R/20 unit and launch Windows Desktop. This requires a password specific to each unit.

  2. Launch Lynx Mixer. Here are the settings you’ll find on a factory R/20 image:

    (in this example, the cables are daisy chained, showing the actual output sample rate at the inputs)

    Lynx Mixer application window showing the mixer GUI with many channel strips and faders. The left column shows Sample Clock and Preferred Clock Source with green digital input rate labels (e.g., 44100 Hz, 48000 Hz). At the top left a Rate Select menu displays 44.1 kHz. Numerous channel strips with meters, labels, and record/play buttons are visible across the main area.

  3. Note that the Sample Rate Converter is disabled for all channels. Press the buttons on the left to enable it. It should look like this afterwards:

    Sample Rate Converter panel showing SRC Enable, SRC Ratio and a vertical list of Digital In 1 through Digital In 8. Many entries show green ratio values such as 1.000 : 1 and one entry shows No Input. The panel has blue labels on the left and green status boxes on the right.

4. Open Windows Sound Control Panel (you can use “control mmsys.cpl” in cmd as shortcut). Go to the Recording tab and scroll down to find AES 01 and its following devices:

Windows Sound Control Panel Recording tab showing a list of recording devices with AES 01 highlighted and subsequent AES 02, AES 03, AES 04, AES 05 entries visible; the dialog shows Set Default, Properties, OK, Cancel buttons at the bottom.

5. Right click on the first AES 01 device and select Properties.

6. Go to the Advanced tab and check Default Format. For a factory image it will be 24 bit, 44100 Hz like here:

AES 01 Properties dialog Advanced tab showing Default Format section with dropdown displaying 2 channel, 24 bit, 44100 Hz (Studio Quality); Exclusive Mode checkboxes and Restore Defaults/OK/Cancel/Apply buttons visible.

7. Change the Default Format to 24 bit, 48000 Hz like here:

Default Format dropdown showing 2 channel, 24 bit, 48000 Hz (Studio Quality) selected in the Advanced tab of the device properties.

8. Repeat the same for all other AES 02 – AES 08 recording devices.

9. Press OK in the Windows Sound Control Panel to close it.

10. After it's closed, the Lynx Mixer should instantly change the sample rate to 48000 Hz:

Lynx Mixer Sample Clock panel screenshot showing Measured Rate: 48000 Hz highlighted in green, SynchroLock button showing Locked, preferred clock source list (Internal, External, Header, LStream), and multiple Digital In channels with green 48000 Hz indicators

11. Reboot the unit and verify that the 48000 Hz sample rate persists.

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