[RWP] latency in reaper

Wed May 29 06:34:32 EDT 2013

Don't forget about the hidden safety buffers in most interfaces.

So your reported latency isn't what is always being reported.
YOu have to factor that in.

----- Original Message ----- 
From: "Colin McDonald" <blulemon at telus.net>
To: "Reapers Without Peepers" <rwp at reaaccess.com>
Sent: Wednesday, May 29, 2013 3:37 AM
Subject: Re: [RWP] latency in reaper

> in a room at 20 degrees C with low humidity, sound will travel at 1.125 
> feet per MS.  So yes, if you are ten feet away from the speakers it'll 
> take around 11.25MS to reach you.
> So, with that in mind, I know exactly how a guitar cabinet sounds from ten 
> feet away and the delay is very minimal.  even adding in room reflections 
> which compound that spacial effect, it's still quite dry sounding if you 
> will.
> 11.25 ms is barely noticeable.
> so, since the delay is very very apparent when using record monitor, I 
> wonder if the latency is being stacked through the way the sound is 
> processed?  IE, signal in to the sound card, processed and that process 
> takes say 11MS.  Then the signal is processed again for record monitor, 
> taking 11MS then sent back out the sound card so you can hear it, taking 
> another 11MS...does that make any sence at all?  because I can tell you 
> absolutely that the latency I hear in reaper is far far far more than 
> standing 10 feet away from your amp cabinet.
> It's actually similar to how it would sound standing in the middle of a 
> large empty room at least 100 feet across...which would seem to me to 
> probably be in the range of 50MS minimum plus a couple more to get to my 
> ears from the monitor speakers...so from time of actual sound source, like 
> a hand clap, to the time the sound comes back and gets to my ears, it's 
> gotta be at least 60MS.
> Again, it sounds like a slap back delay with a single repeat.
> shrug
>
> Regards
> Colin
> ----- Original Message ----- 
> From: "Indigo" <33indigo at charter.net>
> To: "Reapers Without Peepers" <rwp at reaaccess.com>
> Sent: Wednesday, May 29, 2013 1:26 AM
> Subject: Re: [RWP] latency in reaper
>
>
>> Man, 3 to 6 ms is nothing to worry about.
>> When you sit with your electric guitar like 10 feet from your speakers, 
>> you get latency.
>> I don't have the actual figures before me, but your ears get the sound 
>> from the speakers with a delay, because sounds runs fairly slowly through 
>> the air between your guitar and the speaker cabinet.
>> The electrical signal from the guitar through the amp to the speaker may 
>> run at near the speed of light, but not sound plowing its way back 
>> through the air to reach your ears
>> It has a couple ms delay.
>>
>> On 5/29/2013 3:08 AM, Colin McDonald wrote:
>>> 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
>>>>>>>
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>>>>>>
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