08/09/2026
Dear Music Lovers! We are thrilled to follow up on our previous post, a teaser for our prototype and its impressive feature set (for such a small device) that is going into production soon...
We had contact with several dealers all over the world to discuss the upcoming Sonnet product, and they were VERY enthusiastic about it!
Here's a little teaser with more details.
The USB, DLNA, and Bluetooth capabilities are powered by a Raspberry Pi 4 compute module. It is ubiquitous, plenty powerful for audio purposes, available (even after 10 years), and it has a universal footprint (think about future upgradeability). Another notable feature is that the CM4 allows for external clocking, a key factor in achieving exceptional audiophile sound quality.
Our main board features 2 clock oscillators, catering to 44.1 kHz and 48 kHz multiples, a common feature in high-end audiophile products. What sets our product apart is the ability to exchange these clocks in the future (PCB footprints are present), providing enthusiasts with the opportunity to upgrade.
What's even more interesting is that the I2S clock distribution was made with discrete logic. A custom driver was written, and the result is a synchronous clock that is located very close to the DAC modules. At Metrum Acoustics we solve problems at the source. This design practically eliminates the need for reclocking or other means to minimize jitter. Measurements on the prototype using TCXOs revealed jitter figures in the low picoseconds.
Stay tuned for more updates...
