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Whats the official latency? 
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Joined: 26 Mar 2003, 00:00
Posts: 2
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Whats the official latency time in milliseconds?


26 Mar 2003, 14:34
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Joined: 15 Oct 2001, 23:00
Posts: 687
Location: France
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for now, we measured :

- 4 ms on MacOS X (using generic MacOS USB audio driver)
- 6 ms on Win Xp (using our dedicated ASIO driver)
- 16 ms on win 98 (using our dedicated ASIO driver)

In addition, a commercial ASIO driver from propagamma (www.usb-audio.com) is fully compatible with UASC-1 on both Mac & PC, this driver allows to reach very low audio latencies (check their site to get the exact milliseconds)

the above results are based on "standard" computers, we will perform soon additonal tests based on high performances CPU.

Jerome


26 Mar 2003, 15:10
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Joined: 26 Mar 2003, 00:00
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Thanks very much Jerome, very informative.


27 Mar 2003, 02:45
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Joined: 15 Oct 2001, 23:00
Posts: 687
Location: France
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New measured results have been posted to:

http://www.waveidea.com/en/products/uas ... hp#latency


16 Apr 2003, 16:38
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This question of latency puzzles me slightly - are your quoted figures (e.g. 3ms on Win2000) the delay between pressing a key on a MIDI keyboard and the sound appearing on the audoi output? If so, what kind of MIDI interface were you using as I know MIDI delays can vary between USB/PCI MIDI devices.

Also, assuming your figures are for audio output only, do you have latency figures for processing audio input in real time e.g. taking a guitar, pasing it through a VST plug-in and listening on the audio output.

Thanks very much.

- Paul

P.S. Are you far from Lille? I'd love to try the unit on my laptop before buying, if possible.


17 May 2003, 15:41
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No, as all other soundcard manufacturers, we are talking about audio latency, not audio + midi since it mainly depends on the MIDI interface you use.
Yes, the 3ms are for output.
We will update soon the site, indicating what is the input latency, I can ensure you it is small as well.
For realtime processing, the latency mainly depends on the effect you are using at the application level. Several applications, such as cubase, use high size audio buffers, resulting in an audible latency.
The UASC-1 does the job, I mean its latency is ultra low (as mentioned on the site), now take care about the ASIO application you choose.
We are at the opposite of Lille ... in the south of France ...

[ This Message was edited by: vincent on 2003-05-17 21:16 ]


17 May 2003, 20:14
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