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Old 06-04-2012, 05:01 PM   #81
CoolColJ
Human being with feelings
 
Join Date: Dec 2008
Posts: 32
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Some results

Windows 7 64 bit SP1
Gigabyte X58a-UD3R with i7 930 at 4 ghz

When I have Speedfan running there is a jump in spike in latencies here and there...

M-Audio Delta 66 PCI

buffer size and reported latency / measured
32 : NA
64 1.45ms : 136-7 samples / 3.08 3.11ms - alternates between the two
128 2.90ms : 264-5 samples / 5.99 6.01ms
256 5.8ms : 520-1 samples / 11.79 11.81ms
512 11.61ms : 1032-33 samples / 23.40 23.42 ms
1024 23.22ms: 2056-57 samples / 46.62 46.64 ms

Delta 66 was my old and first card - seems pretty snappy still! I don't use it for it's analog I/O, just the SPDIF input and as a softsynth playback/recording into my main interface. I figured being a PCI system it would be snappy and I was right


Saffire PRO 24 DSP Firewire

buffer size and reported latency / measured
32 : NA
64 1.45ms : 253-4 samples / 5.74 5.76ms - alternates, but mostly stable on lower value
128 2.90ms : 381-2 samples / 8.64 8.66ms
256 5.8ms : 637-8 samples / 14.44 14.47ms
512 11.61ms : 1149-50 samples / 26.05 26.08 ms
1024 23.22ms: 2173 samples / 49.27 ms Stable

My main interface for now... but I am looking to get something with better coverters and more inputs and outputs to replace my mixer.
Sometimes there is a big delay before the test fires - not sure why... maybe just the suck of Firewire...
The test reported the driver requests ASIO reset on every change - the Delta 66 above does not do this. Can be annoying if you switch in and out of audio software a lot... I guess I should make my Delta 66 as the main card and pipe the audio into my Saffire....
Latency not so good, but to be fair when I play soft synths at 256 buffer size, I don't notice major latency. Hardware synths have 4-10+ ms latency in any case!

Last edited by CoolColJ; 06-04-2012 at 05:09 PM.
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