Supported Sample Rates; Channel Count Under Coreaudio; Repairing Disk Permissions - RME Audio Hammerfall HDSPe AIO User Manual

20.3 Supported Sample Rates

RME's Mac OS X driver supports all sampling frequencies provided by the hardware. Besides
192 kHz and 96 kHz this also includes 32 kHz and 64 kHz.
But not every software will support all the hardware's sample rates. For example Spark does not
display 32 kHz and 64 kHz. The hardware's capabilities can easily be verified in the Audio MIDI
Setup. Select Audio devices under Properties of: and choose the HDSPe. 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 HDSPe's settings dialog (System Clock). Format
thus allows you to activate any sampling frequency quickly and easily.

20.4 Channel Count under CoreAudio

The HDSPe system's ADAT optical interfaces allow to record sample rates of up to 192 kHz
using a standard ADAT recorder. For this to work single-channel data is spread to two or four
ADAT channels using the Sample Multiplexing technique. This reduces the number of available
ADAT channels from 8 to 4 or 2 per ADAT port.
It is not possible to change the number of CoreAudio devices without a reboot of the computer.
Therefore whenever the AIO changes into Double Speed (88.2/96 kHz) or Quad Speed mode
(176.4/192 kHz) all devices stay present, but become partly inactive.
Core Audio
AIO Analog 1 to 6
AIO AES L / R
AIO SPDIF L / R
AIO ADAT 1 to 2
AIO ADAT 3 to 4
AIO ADAT 5 to 8
Channels 3 to 6 shown above are a result of using the optional AI4S-192 and AO4S-192 Ex-
pansion Boards. The phones output (AIO Phones L / R) is displayed as output only.

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.
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Double Speed
AIO Analog 1 to 6
AIO AES L / R
AIO SPDIF L / R
AIO ADAT 1 to 2
AIO ADAT 3 to 4
AIO ADAT 5 to 8
User's Guide HDSPe AIO © RME
Quad Speed
AIO Analog 1 to 6
AIO AES L / R
AIO SPDIF L / R
AIO ADAT 1 to 2
AIO ADAT 3 to 4
AIO ADAT 5 to 8