Profile photo of Stix

Sorry but did you read the white paper above? If correct (and i believe so) it is a myth that a faster sample rate will provide lower latency.
In Logic Audio if you up the sample rate of a project from 48 k to 96k or more the resulting latency does not change. All that happens is the load on the computer CPU goes up!
Here’s my take on it:
Any A/D and D/A conversion of a waveform to a binary number and back takes a fixed time PER SAMPLE. The time it takes is a function of the actual converter design. Let’s say it takes the converters 2ms from input waveform signal until the resulting output waveform is recreated..
Ok – now lets say that the input signal is a 100 hz tone and the sample rate of the converter is really low Say 1 kHz so the 100 hz tone is sampled 10 times per wavelength. Now each sample takes 2 ms to be converted to digital and then back to a 100 hz tone at the output. Total latency = 2ms.
Now let’s say the converters sample rate is 100 kHz (easier math than 96khz!). The 100hz signal will now be sampled 1000 times per wavelength, and each of those samples will take the same 2ms to travel through the converters and recreate the 100 hz tone at the output. Total latency = 2 ms!

Read the white paper and quote below again. The only difference sample rate makes is the highest frequency the converter will handle. It does not change the audio conversion time.
What does happen is the amout of data that the system has to deal with increases proportionally with sample rate – In my example above – the amount of Data has increased by 100 times!
If I’m wrong I’ll eat my shorts! Lol


Richard Howey
Audio Dynamite Ltd
Dual M-Dante/DVS, 17″MBP/Logic 9/Custom Mackie Control