sounds like snake oil to me?
https://helmaudio.com/products/boltdac
THE HELM BOLT - MOBILE STUDIO QUALITY USB DAC/AMP WITH MQA
https://youtu.be/42VjWIixm00
https://helmaudio.com/products/boltdac
THE HELM BOLT - MOBILE STUDIO QUALITY USB DAC/AMP WITH MQA
-Raising the Bar in Your Audio Quality. Now Accessible on Your SmartPhone.
-Plug & Play on Your Favorite Mobile Device for Incredible Studio Quality Audio
-Plays All Music Files: MP3 to MQA and Hi-Res
-MQA Stream Unfolding and HD Support on the Top Hi-Rez Streaming Services
-Industry Acclaimed Design & Technology Delivers the Purist Audio Signal
-Works with Android, iOS, MacOS and Windows 10
-Ultra-Low Harmonic Crosstalk & Reduced Crossover Distortion
-Exclusive 3 Oscillator Design & Impedance Matching
-USB-C Input and 3.5mm Headphone Output
-LED: Blue SD Audio <= 48kHz - Red HD Audio > 48kHz - Magenta For MQA
https://youtu.be/42VjWIixm00
