Firmware Update for RME ADI-648 Released

Jul 8, 2003 12:00 PM, Editors


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A free firmware update is now available for RME's MIDI/ADAT converter, the ADI-648.

The new firmware Version 1.5 adds these features:
SteadyClock is a new clock technology, which will be used in all upcoming products. Previously, the clock section consisted of an analog PLL for external synchronization and several quartz oscillators for internal synchronization. SteadyClock requires only one quartz, using a frequency not equaling digital audio. Latest circuit designs include high-speed digital synthesizer, digital PLL, 200MHz sample rate and analog filtering. SteadyClock offers a highly efficient jitter reduction. For example, an input jitter of 50 ns will be reduced to 3 ns. Additionally, when the external clock source (ADI-648: wordclock, MADI or ADAT) fails, the last valid frequency is held and operation continues. In addition, SteadyClock locks directly within a range of 25 kHz up to 192 kHz (ADI-648 up to 100 kHz).

Firmware version 1.5 now allows accessing the device directly, performing all settings available on the front panel via MIDI. A status request of the current settings can also be done. Windows software can be downloaded for free from the RME Website, giving complete access to the ADI-648 with a simple mouse click via any MIDI port present in the system. MIDI additionally allows for an indication of the incoming MADI status (56/64-channel mode, 48/96kHz frame). Also included is the combination with the upcoming HDSP MADI card (PCI card), which allows control of the ADI-648 via MADI directly from the computer.

An additional Mute function has been added to the routing matrix of the ADI-648. With this, the 8-channel-based outputs of the matrix can be connected to any MADI or ADAT 8-channel input group, as well as being muted per group.

For more, visit RME online at

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