Cary Audio Design DMS-500 Installation guide

USB-A, USB-B, Network Connection FAQ
Q: Should I use a USB DAC or streamer (network audio player) to playback my digital music
files?
A: USB and network audio are two entirely different fundamental approaches. You’re either a
USB DAC person or a network audio person. There is no need to incorporate both into one unit.
• An USB DAC requires a computer to be connected directly to the DAC via a USB
cable and sit right next to the audio system due to USB cable length limitations.
Control of the music is typically handled at the computer through the media player
software one chooses. Typically, an USB DAC can only connect and play music
from one computer at a time. Some media players do have iOS or Android apps to
make control a bit more flexible. If not, you must go to your computer to control
music selections. An USB DAC is a good choice if you do not have a home network,
not network savvy, or don’t care about seeing or possibly hearing a computer while
enjoying your music.
• A streamer (network audio player) connects to your network with either a wired
Ethernet or wireless Wi-Fi signal. The computer(s) and various network devices that
store your digital music files can be located anywhere (AWAY) from your audio
system as long as they are connected to the same network as your streamer
(network audio player). The Streamer (network audio player) controls the playback of
the music. Specialized server software one can install on their computer(s) expands
playback capabilities. Many streamers like our DMS-500/550/600 and AiOS have
custom apps for iOS and Android so control can take place from anywhere within
your network, such as while sitting and relaxing. Streamers can play music from
multiple networked computers seamlessly and are good choice for those comfortable
with networks and computers as to maximize comfort and flexibility while enjoying
your music.
Q: Can’t I use a USB-DAC to stream network audio?
A: Yes, but…
To do so, you still either need a local computer connected to the DAC via USB alongside your
audio system, or use a streaming “appliance” that has USB output.
If using a computer connected to the DAC via USB alongside your audio system, you can
connect to other computers if the local computer and the other computers are all connected to
the same network. They would all have to run the same media player software and you could
potentially send music from one networked computer to the local computer connected to the
DAC via USB if all are set up properly. That’s a big if! However, this begs the question, if you
have your local computer that is connected to the DAC via USB connected to a network as a
means to play music from another computer on the network, then isn’t a more elegant solution
to use a device that is designed and engineered to do this instead of a jerry-rigged solution of
various computers using a combination of network, software, and USB. There are “audio”
solutions and there are “computer” solutions. Computer solutions can pose many detrimental
issues when used as an “audio device.” Cary Audio streamers (network audio players) are not
repurposed computers like many so called streamers.

Using a streaming appliance that has an USB output has its own set of issues. First off, the
appliance MUST be compatible with the USB DAC and have a compatible driver preinstalled for
the DAC. At worst, it won’t work at all. At best, it will only play up to or down to the DAC’s
capabilities.
If you want to stream network audio, it’s always best to use a device or devices that are
designed to work together or as one. There are way too many network, USB, file type,
resolutions, bit depths, etc., issues to consider within digital music along with the various audio
components, software, computers, etc., needed to play together nicely. When forcing one
method to act like another method, or pairing different solutions together as one, way too much
can go wrong, and will, even if you don’t know it. Many times when attempting these types of
solutions, the various components will manipulate the files just to get them to play without you
even knowing it’s been manipulated. So, be cautious.
Bottom line, if you want network audio streaming, use a device designed for network audio. If
you want local computer USB, use a USB-DAC. There really is no reason to use both solutions.
Pick one and enjoy!
Q: How come the DMS-500/550/600 and AiOS streamers don’t have square computer USB
(Type-B) inputs?
A: A network audio streamer can do everything a computer USB (Type-B) DAC can, but more.
For those accustomed to using a dedicated local computer such as a laptop or Mac Mini, etc.,
connected to a USB-DAC, those same computers can connect to your network via Ethernet or
Wi-Fi instead of having to be connected directly to the audio component via a USB cable. Using
a streamer like the DMS-500/550/600 or AiOS, you can access all the same music and music
files from that same computer with the benefit of NOT having to have the computer right next to
your audio system! Additionally, many believe there are sonic benefits to sending digital music
over Ethernet or Wi-Fi to an audio component. It is superior to an USB cable connected to a
computer due to computer noise, jitter and timing anomalies associated with USB. Ethernet and
Wi-Fi don’t have these same inherent issues.
Q: I see USB inputs on the DMS-500/550/600 and AiOS. Does this mean I can connect my
computer directly with a USB cable?
A: No. The rectangular USB inputs on these units are what’s called USB Type A. This means
they are ONLY intended to connect USB devices; such as USB hard disc drive or USB flash
drives. Not computers.
Q: What’s the advantage of a USB Type-A (rectangular) input if I can’t connect a computer to
it?
A: The Type-A USB inputs are a means to playback your digital music files without a computer.
It’s computer-less digital audio. If you copy or store your music file to a USB hard drive or USB
flash drive, you can connect them directly to these inputs to play back your music. It’s also a
great way to share music when having guests over. Tell them to bring a USB flash drive or hard
drive with a party playlist, or, as a means to explore others music collections.

Q: I see other various USB inputs on my component labeled “Firmware.” Can I connect my
computer or USB device to these for music playback?
A: No. USB inputs labeled “Firmware” are only for servicing use and are NOT intended for audio
playback from a computer or USB devices. Attempting to do so may damage the unit and void
warranty service.