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Apogee with Core audio - low latency breakthrough or markeing hype? [message #96280] Mon, 25 February 2008 15:46 Go to previous message
Dedric Terry is currently offline  Dedric Terry   UNITED STATES
Messages: 788
Registered: June 2007
Senior Member
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http://discussions.apple.com/thread.jspa?messageID=3D6693909 #6693909 =
(should take you to the next to last post on that page)

Apparently Apogee's numbers are only while tracking. Sounds like they =
only posted part of the story with their great low latency figures.
It is hard to say if this is the case for everyone though, except for =
Apogee's response when the user called, but since I brought it up in the =
Vista thread, I thought I would pass it along to try and sort through =
marketing myth and real world facts. I was actually kind of hoping the =
Apogee Symphony would smoke at low latency with Core audio and any app, =
just because it would be cool to have such a breakthrough, but this =
really just shows that ASIO is pushing the limits of current OSs =
already, and we haven't really exceeded it yet.

The reports on Nuendo performance is quite a bit faster on XP and ASIO2, =
but it's running fine at low latency on
OSX/core audio - just about 20-30% higher (my adjusted estimate) plugin =
load on the same hardware, same latency: it's really 76 Nuendo multiband =
comps at 64 samples on XP/ASIO, vs 45 on OSX/core audio at 64, which is =
almost 50% more, but I'm assuming there are other plugins in that =
benchmark test to compensate for, and vary part of that loading (I'll =
have to find out for sure when I have more time) - same dual quad =
hardware configs in both cases. I don't know for sure if some of this =
is Nuendo not being optimized for the lower level OSX code base (maybe =
already), or still on Cocoa or whatever - or if it is truly a limitation =
of OSX and core audio. Based on the Logic thread, the latter seems to =
have a bit more weight than it being a Nuendo-only performance issue.

Fwiw,
Dedric



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<DIV><FONT face=3DArial size=3D2><A=20
href=3D" http://discussions.apple.com/thread.jspa?messageID=3D6693909 #6693=
909"> http://discussions.apple.com/thread.jspa?messageID=3D6693909 #6693909=
</A>&nbsp;(should=20
take you to the next to last post on that page)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Apparently Apogee's&nbsp;numbers =
are&nbsp;only=20
while tracking.&nbsp; Sounds like they only posted part of the story =
with their=20
great low&nbsp;latency figures.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>It is hard to say if this is the case =
for everyone=20
though, except for Apogee's response when the user called, but since I =
brought=20
it up in the Vista thread, I thought I would pass it along to try and =
sort=20
through marketing myth and real world facts.&nbsp; I was actually kind =
of hoping=20
the Apogee Symphony would smoke at low latency with </FONT><FONT =
face=3DArial=20
size=3D2>Core audio and any app, just because it would be cool to have =
such a=20
breakthrough, but this really </FONT><FONT face=3DArial size=3D2>just =
shows that=20
ASIO is pushing the limits of current OSs already, and we haven't really =

exceeded it yet.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>The reports on Nuendo performance is =
quite a bit=20
faster on XP and ASIO2, but it's running fine at low latency =
on</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>OSX/core audio - just about 20-30% =
higher&nbsp;(my=20
adjusted estimate)&nbsp;plugin load on the same hardware, same=20
latency:&nbsp;it's really 76 Nuendo multiband comps at 64 samples on =
XP/ASIO, vs=20
45 on OSX/core audio at 64, which is almost 50% more, </FONT><FONT =
face=3DArial=20
size=3D2>but I'm assuming there are other plugins in that =
benchmark&nbsp;test to=20
compensate for, and vary&nbsp;part of that loading (I'll have to find =
out for=20
sure when I have more time) - same dual quad hardware&nbsp;configs in =
both=20
cases.&nbsp; I don't know for sure if some of this is Nuendo not being =
optimized=20
for the lower level OSX code base (maybe already), or still on Cocoa or =
whatever=20
- or if it is truly a limitation of OSX and core audio.&nbsp; Based on =
the Logic=20
thread, the latter seems to have a bit more weight than it being a =
Nuendo-only=20
performance issue.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Fwiw,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Dedric</FONT></DIV>
<DIV><BR clear=3Dleft><BR></DIV></BODY></HTML>

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