[linux-audio-dev] TAP EQ problems

Tim Goetze tim at quitte.de
Fri Aug 5 15:16:39 UTC 2005

[Tim Blechmann]

>> Similar approach works fine here, too (flipping the sign of the 
>> addition constant at every sample or every block, depending on the 
>> algorithm in question). 
>> Inaudible (in fact barely measurable), code is branchless and simple. 
>> Perfect solution for a stupid little problem.

>the denormal handling on the sse unit is far better than on the fpu ...
>it's also possible to enable hardware FTZ/DAZ ...
>better a hardware solution than a software solution ;-)

Hard to disagree :)

However, I find SSE only useful from v2 on, not that much faster than 
an AMD FPU, and a pain to code with gcc. It's limited to x86, so 
you'll need portable C code to go with it. Likewise, h/w FTZ for the 
FPU is nice, but not available anywhere.

In the end, I'll rather write and optimize quick and portable C/C++ 
than endure the coding, compilation and maintenance inferno that is 

Cheers, Tim

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