[Ardour-Users] Denormals

Ross Hamblin rosscoad at gmail.com
Sun Jan 1 18:45:06 PST 2012

On 02/01/12 10:42, John Rigg wrote:
> On Sun, Jan 01, 2012 at 08:05:42PM +0000, Q wrote:
>> On 01/01/12 19:33, Ross Hamblin wrote:
>>> Did you try the pre-built binary of ardour 2.8.12 as a test? I had the
>>> problem
>>> with disabled denormals functions in several versions previous to 2.8.12
>>> (both distro packaged and self compiled), scons threw a warning about
>>> CPU unknown IIRC, but with the release of binary 2.8.12 I am able to use
>>> those functions again. The binary Ardour 3 also works fine here. I have
>>> an AMD Phenom CPU.
> This would suggest that scons isn't detecting the CPU type. Not good.
I just built ardour 2.8.12 from source to test and I get following in
scons output:

checking build system type... ok
checking host system type... x86_64-unknown-linux-gnu

and the denormals options are greyed out in ardour and I noticed in
ardour startup text:
[INFO]: No H/W specific optimizations in use

If I use the binary ardour 2.8.12 those options are available and appear
to be working.


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