User Manual

User’s Guide OctaMic XTC © RME

In Class Compliant mode the default clock mode is Internal, and iOS typically sets 96 kHz. Any

app can change / set the sample rate to a desired value, but not all apps include a choice to

select one. Setting the OctaMic XTC (and with it the i-device) to slave mode by selecting the

AES, ADAT or MADI input as clock source, the OctaMic XTC will be synchronized to the exter-

nal digital sample rate. With a wrong external sample rate heavy audio noise will occur. Without

an external signal the OctaMic XTC changes to its internal clock, with the sample rate set by

iOS or the app in use.

While the MIDI I/Os will send and receive Sysex messages, not all apps are ready to do this.

For example MIDI Monitor and AC-7 do not support Sysex at this time. The app Midi Tool Box

can be used to verify that the XTC is working correctly, and the problem lies somewhere else.