The TOTALDAC d1-server is a versatile audio server designed to integrate seamlessly into various high-fidelity audio setups. It functions as a DAC, server, digital preamplifier, and active crossover, offering a comprehensive solution for digital audio playback. The device is controlled primarily through a web interface accessible via a browser (such as Safari on an iPad) or through dedicated applications like iPeng.

Function Description:

The d1-server's core functionality revolves around its ability to act as a Logitech Media Server (LMS), also known as Squeezebox software. This allows it to read local audio files from connected storage (like a NAS or USB dongle/disk) and facilitate internet streaming from various services. Beyond LMS, the d1-server supports several other audio playback protocols and functionalities:

AirPlay: Enables wireless audio streaming from Apple devices like iPads or computers. This is useful for playing radio or other audio content from these sources.
UPnP/DLNA: Allows the d1-server to receive audio from other UPnP/DLNA-compatible software, integrating it into a broader home network audio system.
RoonReady: Provides compatibility with Roon, a popular music management and playback software, allowing for a rich user experience with Roon's interface and features.
Music Player Daemon (MPD): This is a lightweight and flexible music player server, often used with control applications like Soundirok, and is associated with UPnP functionality.

Important Technical Specifications:

While specific detailed technical specifications like DAC chipsets, sampling rates, or output impedances are not explicitly listed in the provided pages, the manual highlights several operational aspects:

Digital Volume Control: When RoonReady is enabled and the "ROON VOLUME SERVICE" is activated, the d1-server supports digital volume control directly from the Roon graphic interface. In this configuration, DSD files are converted to PCM 176kHz/24-bit. If the Roon volume control is disabled (the default setting), users must rely on the Totaldac infrared remote control or the volume control of their amplifier/preamplifier, and DSD files are read as native DSD.
Audio Port Exclusivity: When LMS is enabled, it takes exclusive control of the audio port. This means that other functionalities like MPD, AirPlay, RoonReady, or UPnP cannot play audio simultaneously. To use these other functions, LMS must be disabled or the iPeng application (if used for LMS) must be turned off.
Boot Time: The d1-server requires a few minutes to boot completely after being powered on. The web interface becomes accessible approximately 2 minutes after boot, and LMS may take up to 5 minutes to fully initialize after being enabled.

Usage Features:

The d1-server offers a user-friendly web interface for configuration and control, accessible via a web browser at http://cubox:8080 or http://cubox.local:8080.

Service Management: The web interface allows users to enable or disable individual services like AirPlay, Logitech Media Server, Music Player Daemon, and RoonReady with a simple "Start Service" or "Stop Service" button.
Default Enabled Services: By default, AirPlay, Music Player Daemon (MPD for Soundirok, associated with UPnP), and RoonReady are enabled.
Default Disabled Services: Logitech Media Server (LMS) is disabled by default.
iPeng Application (for LMS): For controlling the embedded LMS, users can install the "iPeng squeezebox remote control" application on an iPad. This application allows browsing and playing local files, as well as accessing internet streaming services.
Music Library Scanning: Within the iPeng application (after navigating to "Server Settings" and "Rescan Music Library"), users can initiate a scan of their NAS and/or USB disk to add music files to the library.
Internet Streaming Integration: The d1-server supports various internet streaming services through the ickStream platform. Users can log in to services like Deezer, Qobuz, and TIDAL via the web interface (under "Advanced" -> "ickStream") to integrate them into the LMS environment. After logging in to a streaming service, a reboot of the d1-server and a relaunch of the iPeng application are required for the changes to take effect.
Search Functionality: Within streaming services like TIDAL (accessed via iPeng), users can search for artists, albums, tracks, and other content.
Optimal Audio Quality: For the best audio quality when using iPeng, it is recommended to set the volume within the iPeng application to 100%.

Maintenance Features:

Firmware Updates: While not explicitly detailed, the presence of a "Software Updates" option in the "Advanced" section of the web interface suggests that firmware updates are a supported maintenance feature, allowing the device to stay current with new functionalities and improvements.
Resource Management: Users are advised to disable LMS when not in use to free up the audio port and reduce processor load, which can be considered a form of system maintenance for optimal performance of other functionalities.
Reboot Procedure: After configuring streaming service logins (e.g., Tidal), a specific reboot procedure is recommended: kill the iPeng application, switch off the d1-server power supply, wait at least 5 seconds, switch the power supply back on, wait at least 5 minutes for boot-up, and then relaunch iPeng. This ensures proper integration of the new settings.

Totaldac d1 - LMS Web Interface for Music Streaming; Accessing LMS Advanced Settings; LMS Home Page Overview