Meet The Doppler by Artium Instruments

video upload by Artium Instruments

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The Doppler is a polyphonic, 2-operator FM synthesizer with a unique approach to sculpting, tweakability, and has 8-note polyphony. It's designed for sonic exploration, where every knob twist reveals a new sound that's uniquely your own.

Ultra-tweakability is at the core of the Doppler. It features a single, powerful algorithm, but the magic happens when you start adjusting its parameters. Even the subtlest tweaks lead to big shifts in the overall sound, making every turn feel like a discovery.

At the heart of the Doppler areThe Doppler is controlled via MIDI through a USB-C port, making it easy to integrate into your setup. Most modern, class-compliant MIDI controllers with USB functionality will plug in and work instantly with no setup required. Plus, the Doppler powers your controller, simplifying your cord management. For older controllers with only DIN connections, a USB-to-DIN converter works wonderfully. two sine waves that form the foundation of its sound. The modulator wave is quantized and can modulate both the carrier's phase and frequency—or both at once for even more complexity. The carrier wave can even be sent through a feedback loop to modulate itself. Plus, there's a 9-octave pink noise source to modulate the carrier, adding texture and a lo-fi grit.

The modulator sine wave features two rotary switches that control its frequency through a quantized octave and semitone shift. The Octave rotary switch offers a 5 octave range, allowing you to go two octaves above and two octaves below the carrier’s frequency. The Semitone rotary switch gives you a 12-semitone range, from the base note up to 11 semitones above. Both switches click into place and are perfectly quantized in relation to the carrier's frequency.

The Doppler features a standard ADSR envelope, but there are a couple of cool nuances that really enhance its functionality. By default, the ADSR envelope only affects the carrier wave. However, when you flip the Env Mod toggle on, the envelope also influences the amount of frequency modulation applied to the carrier. On top of that, the Mod Trail knob lengthens the attack value, but only on the modulator wave. This gives you the ability to make the modulation swell in, adding an extra layer of depth.