#80
- Created on2008-02-22 17:55
- Reported by
- StatusFixed
- PriorityHigh (2)
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PA/WMME recommended deviceInfo->default*Latency values need review
The defaults were copied from the V18 code. We could probably do some tests and do better now.
Test results have been gathered using patest_wmme_find_best_latency_params.c They are attached to ticket #185. There was also a public call for people to run the tests:
http://music.columbia.edu/pipermail/portaudio/2011-July/012789.html
See also:
META TICKET: #97 [META] Some PA recommended deviceInfo->default*Latency values are bad or unimplemented
Test results have been gathered using patest_wmme_find_best_latency_params.c They are attached to ticket #185. There was also a public call for people to run the tests:
http://music.columbia.edu/pipermail/portaudio/2011-July/012789.html
See also:
META TICKET: #97 [META] Some PA recommended deviceInfo->default*Latency values are bad or unimplemented
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Based on preliminary results from ticket #185 (see pdf attached to that ticket) I'm going to set default output latency to 90ms for XP, Vista, Win7. There may be some scope for reducing this on WinXP and Win7 if we can show that high latencies are due to Vista (not sure at this stage, need more data).
The test has been written and some results have been collected. A call for additional testers is here: http://music.columbia.edu/pipermail/portaudio/2011-July/012789.html
I'm leaving this ticket open for now since we would like more results.
I'm leaving this ticket open for now since we would like more results.
Resolving as fixed by changeset r1731. I've reduced the default latency on WinXP, Vista and Win7 down to 90ms based on interim results from ticket #185. I feel that we could probably have lower defaults for WinXP and Win7 if we could perform a more extensive survey.