Cambridge Audio 851N and CXN album art - finding and fixing

Cambridge Audio 851N

Given album art is an important part of the digital music experience, it's important to ensure album art is present and correct, regardless of whether we are using software or hardware based music players. This week we look at the Cambridge Audio 851N and CXN network players' album art requirements (spoiler: there aren't many!) and how to configure bliss to ensure those storage requirements are met.

Cambridge Audio manufacture several different series of hi-fi products. In each series there are multiple products; amplifiers, CD players, DACs and more. As ever, it's the computer audio components we are interested in, specifically the Cambridge Audio network players. The network players currently sold in the Cambridge Audio hi-fi range are the 851N and the CXN.

These devices offer the ability to display album art, both on the device itself and also via the app used to control the players. We all know by now that album art is essential to the digital music experience, so we want to make sure that the album art is displayed when we browse the music in our music library.

When working with the Cambridge Audio network players, the important factor is the music source. Either the music is streamed from a separate UPnP server, or it is stored in some sort of portable storage and connected via USB to the network player.

Fortunately, Cambridge Audio have worked to minimise the requirements on the artwork. Unlike some systems there are no restrictions on artwork resolution imposed by the hardware itself, for example. However, and naturally, there are requirements imposed to make sure that the players can locate the artwork for display. These are:

  • When playing from a UPnP source, the artwork must be embedded.
  • When playing from a USB source, the artwork must be in a Folder.jpg file located in the same folder as the album music files.

As these rules are not contradictory, that offers the possibility of applying both rules using bliss. In any case, I would recommend both embedding and saving a separate image file in the interests of general music library best practice and achieving compatibility with as much software and hardware as possible.

UPnP: a warning

Just a note before we go into the walkthrough. UPnP is a standard by which music (and other media) can be streamed to your 851N/CXN network player. There are numerous UPnP servers which comply with the standard, so you can connect your player to that server. However, that doesn't mean all UPnP servers work the same in areas not covered by the specification.

For example, it's not unknown for some UPnP servers to shrink artwork before streaming it, regardless of the size of the embedded images. That can be a problem because the streamed image is not of a resolution to provide a satisfactory display in the Cambridge Audio app.

Cambridge Audio maintain a list of recommended UPnP servers:

  • Western Digital (MyBook and MyCloud) NASes
  • Buffalo NASes
  • Plex [OS X]
  • Twonky [OS X, Windows]
  • Asset [OS X, Windows]

Using bliss to install artwork for Cambridge Audio network players

We'll start assuming you have already downloaded and installed bliss.

Once you start bliss and visit the Albums page (the default page), click settings:

Settings: selecting the music folder and enabling the cover art rule

First, you enter the location of your music library.

If you are using a UPnP server to stream the music to your network player, this will be the location of music from which the UPnP server streams. This may be on the same computer on which you run bliss, if the UPnP server is running on your computer. If your UPnP server is running on a NAS, you will need to mount the network drive.

If you are using a removable USB drive then you should point bliss at the music folder within the drive. On Windows, this should show as a named drive, e.g. "Y:\". On OS X, the folder should appear under /Volumes.

Once you have entered the location of your music, onto the next step! Under Cover art click the ON/OFF button. You get the cover art settings:

Click 'more' to get more advanced control

We can now set the Cambridge Audio album art rules. Because there are so few, all we need to do is:

  • Change the Saved artwork name to "Folder".
  • Ensure Embed cover art in music files is set to "Embed art where possible"

There are further options revealed by pressing more which allow control over artwork sizing.

Now click Apply rules and bliss will begin assessing and fixing your artwork!

If bliss finds an album with neither embedded artwork nor a Folder.jpg, it will find artwork online and install it, embedding and saving to Folder.jpg.

If bliss finds an album with embedded artwork, but without a Folder.jpg, it will save the embedded artwork to Folder.jpg. It will perform the same activity, vice versa, when the embedded artwork is missing but the file exists.

If both items are present, bliss will not perform any work.

Once an album has been assessed it will be marked as Compliant or Non-compliant. If it's the latter, bliss will have failed to either save the Folder.jpg or embed the artwork. Common causes of this may be write-protected files or the infamous hidden Folder.jpg.

I hope this helps complete your Cambridge Audio album art, and ensures it displays on the devices or in the app!

tags: walkthrough
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The Music Library Management blog

Dan Gravell

I'm Dan, the founder and programmer of bliss. I write bliss to solve my own problems with my digital music collection.