[LAU] Audio interface latency measurements

Hello folks,

Is there a site/repository somewhere with numbers on audio interface latency?

I'm much interested in doing multichannel live audio processing and
the device latency matters a lot in this case. I'm especially curious
how recent USB audio interfaces provide in this regard. Anyone has any
numbers?

Lastly, here are some numbers for the firewire interfaces Edirol FA-66
and Presonus FIRESTUDIO Project I measured with jack_delay.

FA-66

jackd -Z -t 9999 -d firewire -p 128 -r 44100 -X seq
      618.760 frames 14.031 ms

jackd -Z -t 9999 -d firewire -p 64 -r 44100 -X seq
      420.924 frames 9.545 ms

jackd -Z -t 9999 -d firewire -p 128 -r 48000 -X seq
      618.780 frames 12.891 ms

jackd -Z -t 9999 -d firewire -p 64 -r 48000 -X seq
      440.792 frames 9.183 ms

jackd -Z -t 9999 -d firewire -p 128 -r 96000 -X seq
      724.485 frames 7.547 ms

jackd -Z -t 9999 -d firewire -p 64 -r 96000 -X seq
      560.492 frames 5.838 ms

jackd -Z -t 9999 -d firewire -p 128 -r 192000 -X seq (unstable)
      989.556 frames 5.154 ms

FIRESTUDIO Project

jackd -Z -t 9999 -d firewire -p 128 -r 44100 -X seq
      543.411 frames 12.322 ms

jackd -Z -t 9999 -d firewire -p 64 -r 44100 -X seq
      351.412 frames 7.969 ms

jackd -Z -t 9999 -d firewire -p 128 -r 48000 -X seq
      543.438 frames 11.322 ms

jackd -Z -t 9999 -d firewire -p 64 -r 48000 -X seq
      351.438 frames 7.322 ms

jackd -Z -t 9999 -d firewire -p 128 -r 96000 -X seq
      566.642 frames 5.903 ms

jackd -Z -t 9999 -d firewire -p 64 -r 96000 -X seq
      374.642 frames 3.903 ms

Regards,
Robert
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Received on Fri Jun 20 16:15:03 2014