effective latency???
in pro tracks under - options/audio/general tab - it says the effective latency at 44khz/stereo is 10.0 msec = is that good or bad? - what's an accebtavle level?
im having a devil of a time re-recording something at the moment, cant seem to get it on the beat - i know im a bad muscician - but something seems weird.
is there a way to decreas the latency? (the buffer is all the way to the left already) - if i switch to 16 bit instead of 24 would that help? would WDM be faster?
im having a devil of a time re-recording something at the moment, cant seem to get it on the beat - i know im a bad muscician - but something seems weird.
is there a way to decreas the latency? (the buffer is all the way to the left already) - if i switch to 16 bit instead of 24 would that help? would WDM be faster?
Comments
10ms is certainly usable. anything less than 5ms is virtually unnoticeable latency.
This is with the GNX3000 right? I have a GNX4 and use the ASIO4ALL drivers, the GNX4 is on WDM mode (there's no other mode for it) and I get 2.9ms with 8 tracks of audio and 4 plugins. It's running on a laptop with Sonar 5, Pentium M 1.3GHz, 768MB RAM, 54000 RPM Disc.
switching to 16 bit would probably help, there's less strain on the system. WDM would not be faster than ASIO.
do you know what is the biggest factor affecting latency on the pc side?? processor speed? ram? how can i boost my base unit? - if i turned off all the background apps would that help?
The biggest factor is first the device and its drivers. The CPU AND the RAM help too as you have as you don't need to stream as much data with more RAM and you have more power to go to lower latencies. However I'm not sure how would that change the number reported in Pro-Tracks, since I don't know how it gets computed (if it's based simply on buffer size or if it takes into account other factors).
Eliminating background apps helps. Another tip is to Make sure you set Processor scheduling to 'Background Services' in the Advanced page of the Advanced section of the System applet in Control Panel.
http://www.soundonsound.com/sos/jan05/articles/pcmusician.htm
well i read through the article and adjusted the control panel option you suggested. thing is when pro tracks plus was installed it seems to automatically have optimised itself for the lowest latency. theres nothing i can do actually change the value except change the sampling rate from 44100hz to 44800hz = i then go from 10.0ms to 9.2ms (woohoo :? ). i gather that this increases cpu overheads (whatever they are
even trying the guide in the article of increasing the buffer size from 64 to 1024 to create a high latency and work backwards = did nothing! just stayed at 10.0ms..
interestingly - using these tips i managed to get the latency on my soundcard using an old version of pro tracks from 100.00ms to 10.0ms!
going from 24 bit to 16 bit didint make any difference - which is good, im getting used to this 24bit recording - ive been spoiled now!
10.0ms it is then i guess = thanks for the help anyway - i learned a lot this evening.
I'm using the WDM drivers and my real, measured recording latency is about 1.6 ms (on a 4yr old 2.4ghz Dell). I know this because according to the time gradients in track view, a re-amped waveform is this far behind the dry source waveform.
Yet, \"Effective\" latency on the Audio/General tab at 44K Hz says 100ms! I ignore it.
Another tip: Monitor from the GNX, not the PC. Absolutely no audio latency whatsoever doing this.
My recordings tend to come out slightly behind the beat too, but I've somewhat painfully figured out it's just me
- g
yes - i always have monitored from the pedal, i bought the GNX becasue i was so impressed with the RPX400 zero latency = but you're right! i only really noticed the effective latency details last night. for all i know it could have said the same thing on the rpx too but i just didnt notice.
i will ry reamping a clip to see thew difference = thanx for all the info!
He he he true, nice to put things in perspective.