RME HDSP 9652 [36/75] Supported sample rates

User's Guide HDSP System HDSP 9652 © RME

20.3 Supported Sample Rates

RME's Mac OS X driver supports all sampling frequencies provided by the hardware. Besides

96 kHz this also includes 32 kHz and 64 kHz.

But not every software will support all the hardware's sample rates. The hardware's capabilities

can easily be verified in the Audio MIDI Setup. Select Audio devices under Properties of:

and choose the Hammerfall DSP. A click on Format will list the supported sample frequencies.

If the unit is in clock mode Master, selecting a sample rate will immediately set the device to

this frequency, which can be verified in the HDSP's settings dialog (System Clock). Format thus

allows you to activate any sampling frequency quickly and easily.

20.4 Channel Count under Core Audio

The HDSP system’s ADAT optical interfaces allow to record sample rates of up to 96 kHz using

a standard ADAT recorder. For this to work single-channel data is spread to two ADAT chan-

nels using the Sample Multiplexing technique. This reduces the number of available ADAT

channels from 8 to 4 per ADAT port.

It is not possible to change the number of Core Audio devices without a reboot of the computer.

Therefore whenever the 9652 changes into Double Speed (88.2/96 kHz) mode all devices stay

present, but are partly inactive.

Core Audio Double Speed

HDSP 9652 ADAT 1 to 8 HDSP 9652 ADAT 1 to 4

HDSP 9652 ADAT 9 to 16 HDSP 9652 ADAT 5 to 8

HDSP 9652 ADAT 17 to 24 HDSP 9652 ADAT 9 to 12

HDSP 9652 SPDIF L / R HDSP 9652 SPDIF L / R

20.5 Repairing Disk Permissions

Repairing permission can solve problems with the installation process - plus many others. To do

this, launch Disk Utility located in Utilities. Select your system drive in the drive/volume list to

the left. The First Aid tab to the right now allows you to check and repair disk permissions.

20.6 PCI card and PCI slot compatibility

Unfortunately not every RME card will work in every PCI slot of an Apple computer. To our

knowledge, the current Hammerfall DSP systems can be used in any PCI slot of all G4 and G5

models. In case additional PCI cards of any manufacturer are used, it might happen that the

RME card is no longer found by the system. Swapping cards between slots can be helpful in

this case.