That is correct, but then we expect most of these uses to be
offline, so ksmps=1 is not a problem. For RT, then things
like these can be done with partikkel.

I would also like to see sample-accuracy, even if it is just to
make Csound comparable on these grounds to other systems.
But I think that is probably a case of major re-engineering.

At the moment, I have not a clue really how this is done, or
how it is approached by other systems. I'd love to learn it.

Victor
----- Original Message ----- 
From: "Oeyvind Brandtsegg" 
To: "Developer discussions" 
Sent: Tuesday, October 21, 2008 8:38 AM
Subject: Re: [Cs-dev] Sample accurate k-rate was Re: 
Questionsaboutmusmon/insert


I do agree that for most normal uses, 1 ms resolution would be enough.
Still, I think it would be valid to research the possibility of
increased timing resolution. If it will be very expensive CPU-wise it
should be done as some sort of special case so as not to decrease
efficiency in (most normal) other cases.

One case where increased resolution would be needed is if we want to
do "scored" granular textures. With 1ms resolution, it is possible to
generate a synchronous granular stream at 1000Hz. But no way of
generating the same at 999Hz....

Of course, one could do this exeact special case with partikkel and
the sync input,
but someone might want to approach it differently

Oeyvind


2008/10/21 victor :
> yes, all opcodes work on chunks. Changing this is a major task.
> But: running at ksmps=10, for my perception is enough. I must say
> I can't distinguish events that are less than 1ms from their correct
> start time. Csound seems to run fast enough, too, with that k-rate.
>
> Regards
>
> Victor
>
> ----- Original Message -----
> From: "Jonatan Liljedahl" 
> To: "Developer discussions" 
> Sent: Monday, October 20, 2008 10:40 PM
> Subject: Re: [Cs-dev] Sample accurate k-rate was Re: Questions
> aboutmusmon/insert
>
>
> I actually thought that events could start within a k-rate cycle,
> because I saw an "unsigned long start_kcnt" in the eventnode struct and
> assumed this was it's usage. But maybe it's actually start time measured
> in k-rate cycles?
>
>  typedef struct eventnode {
>    struct eventnode  *nxt;
>    unsigned long     start_kcnt;
>    EVTBLK            evt;
>  } EVTNODE;
>
> jitter-free event scheduling would be very nice. But maybe many opcodes
> assume they work on whole k-rate chunks?
>
> Victor Lazzarini wrote:
>> But the event start times will always be at k-rate boundaries,
>> unless we change the whole system.
>>
>> At 17:09 20/10/2008, you wrote:
>>> I understand that all events are rounded to k-periods (e.g. score and
>>> MIDI events), so when you increase the size of kr, you are actually
>>> adding jitter to the precision of event timing. It would be nice if
>>> events had some sort of time stamp that indicated to which sample
>>> within the k period the event belonged to, so that opcodes that want
>>> to take advantage of this can do so, while others can simply ignore it
>>> and continue with the previous behavior. This would enable sample
>>> accurate syncing of events even if the opcode receives k-rate
>>> information. The opcode would have to keep track of this internally,
>>> naturally.
>>> My goal is to have score and MIDI events with no jitter, no matter the
>>> size of kr. Maybe there's a better way to do this?
>>>
>>> Cheers,
>>> Andrés
>>>
>>> On Mon, Oct 20, 2008 at 9:23 AM, Victor Lazzarini
>>>  wrote:
>>>> Explain a little more , please?
>>>>
>>>> At 15:09 20/10/2008, you wrote:
>>>>> How hard would it be to time tag events within a control period? It
>>>>> would be great if opcodes could have sample accurate processing of
>>>>> k-rate signals (like MIDI for instance).
>>>>>
>>>>> Cheers,
>>>>> Andrés
>>>>>
>>>>> On Mon, Oct 20, 2008 at 5:43 AM, jpff  wrote:
>>>>>> That is one of my current concerns -- I have not looked at Beatmode.
>>>>>> Anyone got a simple example I can try?
>>>>>> ==John ffitch
>>>>>>
>>>>>>
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>>>>>
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>>>>> --
>>>>>
>>>>>
>>>>> Andrés
>>>>>
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>>>>> _______________________________________________
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>>>> Victor Lazzarini
>>>> Music Technology Laboratory
>>>> Music Department
>>>> National University of Ireland, Maynooth
>>>>
>>>>
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>>>
>>>
>>> --
>>>
>>>
>>> Andrés
>>>
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>>
>> Victor Lazzarini
>> Music Technology Laboratory
>> Music Department
>> National University of Ireland, Maynooth
>>
>>
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>
>
> --
> /Jonatan         [ http://kymatica.com ]
>
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