The Glensound HOWL 32 is a high-density frequency shifter for preventing audio feedback across Dante and AES67 audio networks. It can be fitted with a maximum of 4x independent frequency shifter cards. Each of these cards provides 32 audio inputs and 32 frequency-shifted audio outputs from the network.
There is only one user control on the HOWL 32, as the frequency shift function is preset via the HEX switch on the front panel. This allows the user to select the shift frequency and direction.
The audio that comes in goes back out, up or down by the set level. This function means that if you route a mic audio input via the HOWL 32, you will significantly reduce the likelihood of acoustic feedback.
Every frequency input has a fixed offset; for example, if it's set to 5Hz down, 1kHz in to 995Hz out. So the signal coming back to the mic is never at the same frequency as what left it. That means the system can't 'lock onto' a single resonant frequency and build a continuous howl, as the potential feedback frequency keeps changing.
Being designed for 24/7 broadcast operation, each module on the HOWL32 features redundant network interfaces. Both primary and secondary network interfaces are available on copper Ethernet and SFP module slots for fiber. Redundant power is available via dual AC IEC connections.
Dante network audio is a common protocol for distributing high-quality linear audio over standard IP networks, and it is widely used by many audio equipment manufacturers. The Glensound HOWL 32 Frequency Shifter will be compatible with any other manufacturer's Dante audio interface.