On 01/07/2011 10:37 PM, Gabriel M. Beddingfield wrote:
>
>
> On Fri, 7 Jan 2011, torbenh wrote:
>
>> On Fri, Jan 07, 2011 at 08:05:59AM -0600, Gabriel M. Beddingfield wrote:
>>>
>>> Indamixx 2/Transmission 5 (MeeGo) has a PREEMPT kernel, and
>>> therefore rtirq won't work with it. We've spent a lot of time
>>> tuning this kernel, and while there have been no clinical tests...
>>> we're experiencing performance very close to Transmission 4's
>>> PREEMPT_RT kernel (With jack running at 512x2 frames/buffer and
>>> 44100 Hz) on various machines.
>>
>> ahh... 512 is pretty high latency, normal PREEMPT kernels should do that
>> pretty well.
>
> I knew _someone_ would chime in about 23ms being "high latency." :-)
LOL, but it is.
As far as I'm concerned personally, when using the computer as
effect-rack playing guitar or bass:
latencies between 10 and 20ms are the worst!
>20ms I can manage and compensate somewhat.
<10ms is fine.
<5ms is great.
I do run jack at 64*2 - jack_delay measures 4.9ms total round-trip
latency. It rocks!
> FWIW, several popular apps (esp. those doing Fourier Transforms, like
> time-stretchers) will not work reliably at <256 frames/period.
Would you care to enlighten us which popular apps that are?
'fmit' for example uses FTT and works just fine at 32fpp.
2c,
robin
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Received on Sat Jan 8 00:15:10 2011
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