DDF stands for Dynamic Digital Filtering. WANDLA includes several built-in digital filters to tweak the sound — but why dynamic? Because they will change: YOU will determine which filters are the best. We are inviting WANDLA users to vote — tell us what your favorite filter is, and why. We will gather this data to declare the most popular filters, so, as a reward for your experimental efforts, we can progressively replace the least popular filters with new ones. This is a great chance to collaborate and to deeply engage with how filters affect sound, so that you can fine-tune your WANDLA to be perfectly tailored to your preferences.

In WANDLA’s menu, you can choose from a set of digital filters. One is a part of the ESS DAC, and four were designed especially for WANDLA by filter specialist Jussi Laako of Signalyst, best known for the HQPlayer app. Out of the box, WANDLA defaults to the team’s favorite filter — in a sense, we already gave this setting our stamp of approval. But to deserve the name ‘The Converter’, WANDLA needs to go further. Just adding a static set of filters was not going to do it for us — and more importantly, not for you. We want YOUR stamp of approval.

We will add future filters via firmware upgrade — once you’ve voted on your favorite in our survey, you’ll be notified when additional filters are released. In the end, by exchanging the least popular filters for the best ones, WANDLA users will arrive at the ultimate set of highly tailored digital filters. This is unique to Ferrum, to DACs in general, and to the audio business as a whole. Welcome to the world of digital filters!