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Multicard Operation<br />
OS X supports more than one audio device. Their simultaneous usage within one program had<br />
been limited to Motu's Digital Performer until 10.3.9. Since 10.4 (Tiger) Core Audio offers the<br />
function Aggregate Devices, which allows to combine several devices into one, so that a<br />
multi-device operation is now possible with any software.<br />
The Hammerfall <strong>DSP</strong> driver adds a number to each unit, so they are fully accessible in any<br />
multicard-capable software.<br />
22. Hotline – Troubleshooting<br />
The newest information can always be found on our website www.rme-audio.com, section Support,<br />
Macintosh OS.<br />
The 8 ADAT channels don’t seem to work<br />
• The optical output has been switched to SPDIF. The ADAT playback devices are still usable<br />
by routing and mixing them in TotalMix to other outputs.<br />
Playback works, but record doesn’t:<br />
• Check that there is a valid signal at the input.<br />
• Check whether the Hammerfall <strong>DSP</strong> has been selected as recording device in the audio<br />
application.<br />
Crackle during record or playback:<br />
• Increase the number and size of buffers in the application.<br />
• Try different cables to rule out any defects here.<br />
The card and drivers have been installed correctly, but playback does not work:<br />
• Is Hammerfall <strong>DSP</strong> listed in the <strong>System</strong> Profiler/PCI? (Vendor 10EE, Device ID 3FC5).<br />
• Has Hammerfall <strong>DSP</strong> been selected as current playback device in the audio application?<br />
40<br />
User's Guide H<strong>DSP</strong> <strong>System</strong> H<strong>DSP</strong> <strong>9632</strong> © <strong>RME</strong>
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