Harmony µDDC
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The Harmony µDDC is a high-performance digital-to-digital converter designed to elevate your audio experience. Equipped with advanced reclocking technology, it reduces jitter and ensures a cleaner, more precise digital signal for your DAC. Supporting multiple input formats and offering high-quality I2S output via HDMI, the Harmony µDDC seamlessly integrates into any high-end audio system.Compact, versatile, and engineered for excellence, the Harmony µDDC is the perfect addition to unlock the full potential of your digital music.
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Highlights
Precision Femto Clock
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Ultra-low jitter ensures pristine timing accuracy for superior audio clarity and detail.
Versatile I²S Inputs and Outputs
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Input: High-performance USB, AES/EBU, Coax I²S input with pinout configuration.
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Output: Galvanically isolated I²S outputs for uncompromised signal purity and reduced noise.
High Sampling Rate Support
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PCM: Supports resolutions up to 768kHz*
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DSD: Handles formats up to DSD512*
External Master Clock Input
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Seamless integration with an external 10MHz master clock for precision synchronization.
*For USB and I²S inputs only.
Please check out the product overview and tech specs for more details: https://www.laiv.audio/harmony-uddc
Reviews
I’ve integrated the Laiv Harmony µDDC into a highly optimized system built around the Gustard R26 DAC, and I can confidently say: this was the missing piece.
Before Laiv, I had already invested in high-end components, clean power (NCF filters, linear PSU), mechanical isolation, and careful fuse tuning (HiFi-Tuning Supreme³). Still, when I added the µDDC and connected it via I²S, the sound took a huge leap forward. Backgrounds became blacker, instrument decay more natural, and spatial precision reached another level. Compared to direct LAN or coax from my streamer (WiiM Pro), the improvement with Laiv was not subtle—it was decisive.
I now run the R26 exclusively in NOS mode because the input from the Laiv is so clean and stable that it lets the DAC perform at its absolute best. The soundstage is wide, tall, and deep. Music feels unforced and lifelike. This is the first time my system sounds truly high-end from end to end.
The build quality is excellent, and setup was plug & play. I also upgraded the HDMI (I²S) connection to AudioQuest Vodka 48, which unlocked even more spatial realism. The Laiv Harmony µDDC has outperformed even what I had expected from the Volumio Rivo+, and it pairs beautifully with the Gustard R26.
Highly recommended for anyone serious about digital playback.
Watched a lot reviews before pulling the trigger and I’m not one bit disappointed. I believe the hype is accurate. Especially when paired with the uddc. The udac by itself was a great upgrade from my Hegel hd10, but just slightly in richness of tone and texture, punchier bass, not quite as artificial sounding or metallic. Adding the uDDC brought another lever of texture, air and deepend the soundstage while lifting the vail on the layers.
Jacky Ronnel May 4, 2025 – Short Review
LAIV uDCC
connected to the LAIV Harmony DAC I2S input, with a high-quality HDMI cable
First impressions after a 4 hours initial session with my reference recordings that I am using to evaluate a new component.
The first thing that I could hear clearly: Transient attacks are faster, snappier, more articulate, deep bass is a little tighter.
The Penderecki 7th symphony, 5th movement (Lauda Jerusalem) on the Naxos recording never sounded so explosive and so scary.
Listen to the truly explosive dynamic range on the “Blues in the Bassment,” by Lalo Schifrin, on Jazz meets the Symphony record.
With the LAIV uDDC it sounds even more explosive, and Ray Brown’s bass lines are even tighter.
With the LAIV uDDC, bells, chimes, and similar instruments sound richer and sweeter. Light cymbal strikes sound more alive, with more air.
Listen to Ayumi Tanaka Trio, on “Ruins II” and on “Ichi”. The cymbal interplay sounds richer and more expressive.
Johnny Hodges saxophone on “Gone with the Wind” sounds richer, with more harmonics, more air, and the rhythm section in the background sounds clearer now.
For the finest degree of clean, natural and intimate female voice recording, listen to the “Bayou” track on the Bayou record (ECM) by Thomas Stronen. With the uDDC it sounds even more natural, and the thunderous deep bass smacks sounds more articulate.
In addition, on good quality recordings, violins sounded fuller, smoother, richer, more lifelike.
The backgrounds are slightly blacker.
My system, including the LAIV uDDC, is now even less fatiguing (more analog like, with “rounded edges”), even when increasing the volume by 1 or 2 dB.
I didn’t hear an improvement in the resolution and micro details, as they are already very high in my headphone system.
Also, I did not detect yet a change in the soundstage width, depth, or height, however, separation of voices and instruments in complex passages is improved.
Overall, in my opinion, the LAIV uDDC is a must have addition to a digital audio system, provided that there is a high-quality DAC, with a I2S input. I should also mention that I didn’t use the standard Power Supply, supplied with the LAIV uDDC, as I exchanged it for a good quality LHY Audio LPS25VA Linear Power Supply.
I highly recommend the LAIV uDDC