Solid State Logic Soundscape Mixer Manual De Usuario

 
 
 
 

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High performance SCSI cards like the Adaptec AHA-2940UW or other Ultra-Wide  
SCSI host adapters can block the PCI bus because of the high data rate, which may cause audio 
interruptions or clicks. If you experience clicks while using a high performance SCSI card, try 
reducing the maximum transfer rate. 
 

Muting of the Mixer due to excessive use of DSP resources 

 
The Motorola 56301 DSP has memory and DSP clock cycle resources that are shared between all 
mixer elements and third party DSP plug-ins that are active in the currently loaded mixer. The 
Status Bar shows P=xx% and M=xx% for each Soundscape audio card installed in your PC. If either 
of these figures exceeds the maximum (100%) for any single DSP then the SSL Soundscape Mixer 
will be muted. 
 
However, the DSP processing power figure (P) is calculated from the figures reported by each 
individual mixer element or plug-in and as it is very difficult to calculate the “worst case” timing 
for each element or plug-in, there may be some inaccuracy in the reported figures. The actual 
muting of the Mixer occurs when there is really insufficient time for the DSP to complete the 
required processing for the loaded mixer configuration and this may happen with a figure slightly 
lower or slightly higher than 100%. 
 
For a given mixer configuration, the “P=100%” DSP power limit can be reached or not depending 
on the current Sample Rate. This is because for a higher sample rate, there is less time for 
calculations. For instance, if you create a mixer configuration that reaches P=100% at 44.1kHz, then 
it will reach P=108.8% at 48kHz. The card will be unable to run this mixer file at 48kHz. 
 
The memory figure (M) is accurately reported by the elements and plug-ins, but there are several 
different memory types that can be requested by elements or plug-ins and the figure shown is the 
“worst case” usage of any of these memory types. For instance, if a plug-in uses 75% of the X-
memory, but none of the Y or P-memory, then the reported memory figure will be 75% even if the 
other memory types are completely unused. It is possible to reach M=100% and yet to be able to 
load more mixer elements or plug-ins that do not require the same memory type. 
 
Please note that streaming also uses DSP resources, and this is not reflected in the values displayed 
in the Status Bar. Therefore, a mixer configuration that uses 100% of the M or P resources with no 
streaming will not function with streaming.