# USB DAC settings for use with iFi Zen Streamer? Async or sync? **URL:** \ **Category:** Audio Gear Talk\ **Created:** [December 30, 2022, 12:56am UTC](https://community.roonlabs.com/t/usb-dac-settings-for-use-with-ifi-zen-streamer-async-or-sync/228591 "2022-12-30T00:56:33Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Doug\_Hannah](https://community.roonlabs.com/user_avatar/community.roonlabs.com/doug_hannah/32/136862_2.png) [@Doug\_Hannah](https://community.roonlabs.com/u/Doug_Hannah)\ **Post date:** [December 30, 2022, 2:33am UTC](https://community.roonlabs.com/t/usb-dac-settings-for-use-with-ifi-zen-streamer-async-or-sync/228591/2 "2022-12-30T02:33:35Z")
Is this of any help? > [@RAAT and clock ownership](https://community.roonlabs.com/t/raat-and-clock-ownership/6915/2): > > Yes, the advantages happen in cases with an embedded DAC, a USB bridge, or an S/PDIF bridge. Most discussions about audio clocking focus on clock quality, not clock coherence. This discussion is about the latter. The word “jitter” doesn’t belong anywhere near this discussion. RAAT has no impact in that domain. It moves buffers of audio asynchronously, just like USB. It is not involved in generating clock signals to drive DACs. In the best possible system architecture, you’d have one clock: a h… > [@RAAT and clock ownership](https://community.roonlabs.com/t/raat-and-clock-ownership/6915/3): > > The benefits are consistent regardless of whether the receiving device is a DAC or a USB bridge (network streamer to USB device). I’m going to define STREAMER as “a device that receives audio over the network”. I’m going to define PLAYER as “Roon, or any other transmitter of audio over the network”. Airplay/Songcast: [PLAYER] ---- [STREAMER with internal clocking crystal] PLAYER pushes audio using it’s own clock, STREAMER pulls audio using it’s own clock. BAD: 2 CLOCKS FIGHTING! [PLAYER… --- _[View the full topic](https://community.roonlabs.com/t/usb-dac-settings-for-use-with-ifi-zen-streamer-async-or-sync/228591)._