[RWP] latency in reaper

Wed May 29 22:23:30 EDT 2013

11 milliseconds?  You are splitting hairs, aren't you?

One test I like to perform is this:
Record a click track, just a periodic sharp hit from a wood block or 
something.  The shaarper, shorter it is the better.  Not something with a 
long decay, but as square as you can find,  like the square wave from some 
LFO or something, about one second intervals.

Arm another track, and record the sound of the click playing back, fed 
through your mixer, so it comes around and is fed into the analog input of 
your sound card.
Watch out for that record monitor.  You'll want that off.

Now, play the two tracks back together.  That time difference between those 
two playback tracks is what really matters.

I remember audacity being horrible about that ages ago.  Didn't know about 
the manual latency compensation you mentioned.   Good to know that is there.

Anyway, back to reaper, and the two track experiment.
Play the two tracks, one panned hard left, the other panned hard right, and 
listen in headphones.  does it sound like it's in the middle of your head?

When I do that in Reaper here, it is dead center, all latency is completely 
compensated for.  I wonder what happens on your machine.

On my pitiful 1.2GHz xp machine, My in/out latency is listed as about 8ms, 
and that's about what I hear when I judge by record monitor.

Did you know that it takes almost a millisecond to transmit one single note 
via serial Midi?  How many milliseconds to transmit your favorite, lush 
chord?  Mix in a bunch of after touch information, and impulsive controller 
wiggles, and it's a lot more than that.
I remember pondering whether anybody had ever set up a protocol to transmit 
notes ahead of time, with a final message to execute all cached notes.
But, as far as I know, that isn't done.  It would not be backward 
compatible.
Backward compatibility can darn sure tie your hands.

Yeah?  that's probably what microsoft thinks of me.
Just one big backward compatibal pain in the butt.
We'd all be having a wonderful time, if it weren't for, him.

.

----- Original Message ----- 
From: "Colin McDonald" <blulemon at telus.net>
To: "Reapers Without Peepers" <rwp at reaaccess.com>
Sent: Wednesday, May 29, 2013 2:08 AM
Subject: Re: [RWP] latency in reaper

> yes, I have changed the media buffering settings as well...default is 
> 1200MS, so I don't think that has anything to do with recording latency.
> But I've tried everything between 0 and 1200 and no change at all.
> I'm pretty sure I'm stuck with 11MS of latency just due to the hardware 
> limitations.  And without a reverse latency offset function in reaper, or, 
> at least one that works with my machines, I'm not going to get it any 
> better than that.
> How do you guys deal with even a few MS of latency?  I guess I'm old 
> school analogue or something or used to using hardware recorders that have 
> no latency to speak of.
> 11MS is allot to my ears, and even 3MS would bug me.
>
> Regards
> Colin
> ----- Original Message ----- 
> From: "Indigo" <33indigo at charter.net>
> To: "Reapers Without Peepers" <rwp at reaaccess.com>
> Sent: Tuesday, May 28, 2013 11:49 PM
> Subject: Re: [RWP] latency in reaper
>
>
>> Colin, do you find another buffer to reduce; arrow down below midi device 
>> to buffer?
>> Tab down in that title and there should be a second buffer that might be 
>> possible to shrink.
>>
>>
>> On 5/28/2013 9:28 PM, Jim Snowbarger wrote:
>>> Latency at the end of the menu bar.
>>> Wow,  good tip,  I had not seen this.
>>> I'm showing 7.4mS, 256 samples.
>>>
>>>
>>>
>>> ----- Original Message ----- From: "Colin McDonald" <blulemon at telus.net>
>>> To: "Reapers Without Peepers" <rwp at reaaccess.com>
>>> Sent: Tuesday, May 28, 2013 12:40 AM
>>> Subject: Re: [RWP] latency in reaper
>>>
>>>
>>>> interestingly, if you are a jaws user, you can see the current latency
>>>> by routing jaws to PC cursor, going to top of page and it states the
>>>> latency in MS at the end of the menu bar....second line down.
>>>> This is in track view with one track inserted and armed with record
>>>> monitor set to normal.
>>>> Mine is currently at 11MS.
>>>> I can see changes when I alter the block size in the audio device
>>>> settings...i've got it on 256, if I go to 512 the latency shows 17MS.
>>>> Down to 96 and it shows 7.9ms.
>>>> Now in the recording tab under preferences, I should be able to stick
>>>> in negative 11 into the output offset field and it should compensate
>>>> for that delay...
>>>> Doesn't work though
>>>> I should be able to put in say 200ms and get a much longer delay,
>>>> again, no worky lol.
>>>>
>>>> Regards
>>>> COlin
>>>> ----- Original Message ----- From: "Colin McDonald" 
>>>> <blulemon at telus.net>
>>>> To: "Reapers Without Peepers" <rwp at reaaccess.com>
>>>> Sent: Monday, May 27, 2013 10:45 PM
>>>> Subject: [RWP] latency in reaper
>>>>
>>>>
>>>>> Well i switched to asio for all again as my audio driver and the
>>>>> latency definitely dropped to about half of what it was with direct
>>>>> sound or wdm or wav out...but it's still very apparent...like having
>>>>> a short slap back echo on everything.
>>>>> I went and tried to adjust the recording latency in the preferences
>>>>> under recording...there is an input, and output latency adjustment
>>>>> there, but no matter what I put in there, it made absolutely no
>>>>> difference.  Tried from posative and negative 10 all the way up to
>>>>> 200MS in all the fields, in different combinations etc etc, and there
>>>>> is no difference between having 0's in those fields and putting any
>>>>> type of number in there.
>>>>> Any thoughts guys?
>>>>> I turned off the automatically detect reported latency check box
>>>>> beside the edit fields.  Maybe there is something somewhere else that
>>>>> I have checked, or unchecked that is preventing these manual
>>>>> input/output adjustments from functioning correctly.
>>>>> I've done this same thing in audacity as I said, and I just kept
>>>>> changing the value by a few MS until there was zero slap back echo
>>>>> effect happening...you could really hear it change if you went too
>>>>> far or not far enough.
>>>>>
>>>>> Regards
>>>>> Colin
>>>>>
>>>>> _______________________________________________
>>>>> RWP mailing list
>>>>> RWP at reaaccess.com
>>>>> http://reaaccess.com/mailman/listinfo/rwp_reaaccess.com
>>>>
>>>>
>>>> _______________________________________________
>>>> RWP mailing list
>>>> RWP at reaaccess.com
>>>> http://reaaccess.com/mailman/listinfo/rwp_reaaccess.com
>>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> RWP mailing list
>>> RWP at reaaccess.com
>>> http://reaaccess.com/mailman/listinfo/rwp_reaaccess.com
>>
>> _______________________________________________
>> RWP mailing list
>> RWP at reaaccess.com
>> http://reaaccess.com/mailman/listinfo/rwp_reaaccess.com
>
>
> _______________________________________________
> RWP mailing list
> RWP at reaaccess.com
> http://reaaccess.com/mailman/listinfo/rwp_reaaccess.com
> 