Alesis Hammerfall DSP System 用户手册

 

 

User's Guide HDSP MADI

 © RME

25

 

17. Hotline – Troubleshooting 

 

 
The newest information can always be found on our website 

www.rme-audio.com

, section FAQ, 

Latest Additions. 
 
The input signal cannot be monitored in real-time 
 
•  ASIO Direct Monitoring has not been enabled, and/or monitoring has been disabled globally 

(for example in TotalMix). 

 
Playback works, but record doesn’t 
 
•  Check that there is a valid signal at the input. If so, the current sample frequency is dis-

played in the Settings dialog. 

•  Check whether the HDSP system has been selected as recording device in the audio appli-

cation. 

•  Check whether the sample frequency set in the audio application (‘Recording properties’ or 

similar) matches the input signal. 

•  Check that cables/devices have not been connected in a closed loop. If so, set the systems’s 

clock mode to Master. 

 
Crackle during record or playback 
 
•  Increase the number and size of buffers in the ‘Settings’ dialog or in the application. 
•  Try different cables (coaxial or optical) to rule out any defects here. 
•  Check that cables/devices have not been connected in a closed loop. If so, set the system’s 

clock mode to ‘Master’.  

•  Increase the buffer size of the hard disk cache. 
•  Activate Busmaster mode for the hard disks. 
•  In case of a recently done BIOS update of the motherboard: Propably 'Load BIOS Defaults' 

was loaded instead of 'Load Setup Defaults'. This sets the 'PCI Latency Timer' to 0 (default: 
32). 

Low Latency ASIO operation under Windows 2000/XP on single CPU systems: 
 
•  To use ASIO at lowest latencies under Windows 2000/XP even when only having one CPU, 

the system performance has to be optimized for background tasks. Go to >Control Panel/ 
System/ Advanced/ Performance Options<. Change the default 'Applications' to 'Background 
tasks'. The lowest usable latency will drop from 23 ms to around 3 ms.