Broadcast FM MPX

Broadcast FM MPX

Over to you...

Introduction

Version 3.0.26 adds the long awaited MPX output - demodulated Broadcast FM sent via a virtual audio cable at 192kHz to 3rd-party applications, specifically RDS Spy.

Implementation

From the ribbon bar select the BFM Spectrum display. In this display select the Options (•••), in the Broadcast FM Options select MPX Forward.


Output Device

The output device is a virtual audio cable (VAC) which must support a sample rate of 192kHz with either one or two channels. Two products have been successfully used:


More information for each product is shown below.


Starting

  1. Select a VAC definition from the Output device dropdown.
  2. Make sure Enable [X] is checked.
  3. If running the status text will be as shown below.
  4. Start the 3rd-party application, select the same VAC as used here, for more information follow the application's manual.


Persistence

The Output Device selection is saved between sessions, Enable is not saved at present so must be selected as needed.

Virtual Audio Cable

By Eugene (Evgenii) Muzychenko https://vac.muzychenko.net/en/


Looking at Cable 5 in the Virtual Audio Cable Control Panel:

  • SR (Sample rate) must be set to 192000, 192000
  • BPS (Bits per sample) must be set to 8 to 32


Advanced Properties

In addition, the Advanced properties should be set to:

  • 2 channels,
  • 16 bits,
  • 192000 Hz.

VB Audio

Website https://vb-audio.com/Cable/index.htm


Looking at the VB Audio Virtual Cable Control Panel:

  • SR (Sample rate) must be 192000, 192000
  • From the Options menu select internal sampling rate to 96000 Hz.


Advanced Properties

In addition, the Advanced properties should be set to:

  • 1 channel,
  • 24 bits,
  • 192000 Hz.
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