User`s guide

User's Guide HDSPe MADIface © RME

Application examples

DDS allows for a simultaneous change of speed and tune during record and playback. From

alignment to other sources up to creative effects – everything is possible..

DDS allows to intentionally de-tune the complete DAW. This way, the DAW can match instru-

ments which have a wrong or unchangeable tuning.

DDS allows to define a specific sample rate. This feature can be is useful in case the system

randomly changes the sample rate – for unknown reasons. It also prevents a change from Dou-

ble Speed (96 kHz) to Single Speed (48 kHz), which would cause configuration and routing

problems by the changed amount of MADI channels.

19.3 Clock Modes - Synchronisation

AutoSync

AutoSync guarantees that normal record and record-while-play will always work correctly If no

valid input signal is found, the card automatically switches to clock mode ‘Master’. In certain

cases however, AutoSync may cause feedback in the digital carrier, so synchronization breaks

down. To remedy this, switch the clock mode to 'Master'.

Thanks to its AutoSync technique and lightning fast PLL, the HDSPe is not only capable of han-

dling standard frequencies, but also any sample rate between 28 and 200 kHz.

SyncCheck

If several digital devices are to be used simultaneously in a system, they not only have to oper-

ate with the same sample frequency but also be synchronous with each other. This is why digi-

tal systems always need a single device defined as ‘master’, which sends the same clock signal

to all the other (‘slave’) devices.

Remember that a digital system can only have one master! If the HDSPe’s clock mode is

set to Master, all other devices must be set to Slave.

SyncCheck serves as simple check and display tool of the current clock situation. It indicates

whether there is a valid signal (Lock, No Lock), or if there is a valid and synchronous signal

(Sync) at the MADI input.

In practice, SyncCheck provides the user with an easy way of checking whether all digital de-

vices connected to the system are properly configured. With SyncCheck, finally anyone can

master this common source of error, previously one of the most complex issues in the digital

studio world.