Element IV firmware v1.7.4 is now available and I’m excited to share that Core for iOS has arrived in the App Store!
Because this release took longer than planned, firmware v1.7.4 contains extra improvements completed along the way:
USB Communication
We expected to release Core for iOS much sooner, given how easily Core for Android came together. The delay stemmed from my misinterpretation of Apple’s documentation, in which I believed it would be possible to write a custom USB serial driver for iPadOS 16+. It wasn’t. After weeks of stalled progress, I hired a developer with more experience, and he proved me wrong within a week (thanks, Vishnu!). Together, we pivoted to a known iOS workaround, using USB MIDI for communication. JDS Labs registered a SysEx ID with the MIDI Association and preliminary firmware support was completed within two short weeks.
Firmware continues to use a virtual serial port for web and desktop Core connections. Internally, Element IV speaks the same protocol whether connecting through USB MIDI or through a serial port. There’s nothing to configure at your end, aside from installing the latest firmware. It just works!
Core for iOS
Core for iOS supports all modern iPhones and iPads back to iOS 15. You can connect with any common USB C cable to recent iPhones/iPads. For older Lightning devices, you’ll need an Apple Lightning-to-USB adapter.
We also devoted extra time to making the Core interface more mobile-friendly. Those same changes have been backported to Android, and we liked the new EQ Canvas / DSP flip toggle so much that we brought it to the web and desktop builds of Core as well.
New OLED Layout
Volume now appears in a larger font and you can choose between Regular or Bold from the options menu. To improve mode visibility, we replaced the “VOL” label with the current output mode (“HP” or “RCA”), also in a larger font.
Moving output mode freed an entire line, so Element IV can now display the current state of DSP, Loudness, Crossfeed, and Soundstage settings rather than a generic “DSP Active” status.
DSP Profiles are alphabetically sorted in the OLED menu, and the screen wakes upon sample rate changes.
Let us know what you think!
Terrific update John, as I mentioned on Head-Fi, even if I won’t personally be using the iOS/iPadOS apps any time soon.
While we’re on the subject of firmware updates, in my experience each and every time a new firmware has been released, the update has failed on the first attempt. This scared me the first time it happened but I have since learned to expect it, and the update is always successful after power cycling my Element IV, as suggested in the update instructions.
Is there anything I can do to ensure a successful first attempt, or at least improve my odds?
Thanks, Gary. We added a brief FAQ item on this matter. Glad you’ve found a simpler workaround! Certainly reach out if you would like us to swap the flash IC.
Thanks John. I use macOS exclusively. I’ll consider the flash IC replacement but for now I think I can live with the relatively minor inconvenience I described. Firmware updates aren’t exactly a daily occurrence. 😊
Unless, of course, my experience portends a permanent failure to update and bricking of my Element IV at some point in the future.
@Gary – Since the audio device and update device are unique, you may see a macOS permission prompt when the DAC reboots into update mode for the first time, and depending on timing, it can be necessary to power cycle the DAC with full macOS permission. macOS resets device permissions from time to time. No worries!