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Old 06-21-2012, 03:15 PM   #84
CoolColJ
Human being with feelings
 
Join Date: Dec 2008
Posts: 32
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Quote:
Originally Posted by CoolColJ View Post
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!

New driver and software for the Saffire - need to restest as the Saffire can do 32 samples now

• Driver updated to 4.0.0 release
• Improves performance on Windows 7 (x86/x64)
• Improves performance in Pro Tools 10 (Win and Mac)
• Updated available sample buffer sizes
• Sample buffer size now scales with sample rate (I.e. At 44.1 KHz a buffer size of 32 samples is used. Changing to 88.2 KHz increases buffer to 64 samples)
• No longer requires use of Windows legacy Firewire driver (Due to this, users who also use the Focusrite Liquid Mix are recommended to ensure that both products are run on separate FireWire buses. If this is not possible then users are recommended to continue using Saffire Mix Control 2.4)
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