S/PDIF and optical require your DAC to recover a clock it was never given.
I²S hands it one.
There's no such thing as a jitter-free digital interface — every clock has some amount of noise, and every transmission path adds a little more. What changes is where that noise gets introduced, and whether the receiving DAC has to guess at the clock or is simply handed one. S/PDIF and TOSLINK mix clock and data together, so your DAC has to run a PLL to pull a clock back out of that stream — a well-known source of jitter — regardless of how good the transport upstream is. I²S skips that step entirely, using different lines for clock and data. Nice and clean.
Edgewater Audiolab focuses on the parts of a CD transport that most commercial products treat as an afterthought: clocking, ultra-low-noise power isolation, and the control interface between mechanism and DAC. We're not chasing a house sound or a signature voicing — we're building the cleanest possible bridge between reference-grade disc mechanisms and whatever DAC you already own. Our platform combines industrial servo engines via native UART control and un-multiplexed I²S audio output, paired with configurable I²S-over-HDMI pinouts so it can talk to the DAC you have, not just the one we'd prefer you buy.
Our kit is as a modular platform: the board-set and mechanism work as a complete transport on their own, ready for a custom-built enclosure and power supply of your choice. Your gear should reflect your personal aesthetic, blending seamlessly into your system and the room it lives in. Every I²S line, master-clock trace, and control header is exposed and configurable — we don't assume you want our defaults. It's built for people who want to understand exactly what's happening between the disc and the DAC, not just trust that it does.
Separate clock and data lines from mechanism to DAC, so your converter never has to reconstruct a clock from an encoded stream.
Separate, regulated rails for the disc motor, servo, and master clock — so spindle-motor noise never rides in on the clock lines.
Native UART command and telemetry access to the servo controller — laser current, error-correction stats, and playback state exposed for custom front panels, displays, or diagnostics.
There's no single industry standard for I²S-over-HDMI pin mapping. Our mainboard lets you set the pinout to match the DAC you already own.
We're currently establishing OEM vendor partnerships and developing initial hardware evaluation platforms. If you build DACs, transports, or you're deep in digital architecture and have questions about the platform, we'd love to hear from you. Send us a message and we'll reply as soon as we're back at the bench.
