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duet 2 loopback Audio Interfaces
Old 22nd December 2012
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stinkyfingers's Avatar

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duet 2 loopback

i was wondering why i get this 'ripple' effect when doing a loopback with my Duet 2. (balanced out > in, using Mogami 2534 XLR > 1/4" TRS cables)

(44.1 kHz sample rate, 512 buffer size)

also, i was wondering if it was typical to have low level 'noise' from this type of cable/loopback. this is the loopback connection with no signal passing has a 'harmonic' or tone. (it does not always show up @ the same frequency) is this 'OK' or do i have a problem (interference?) and/or need different cables?
and when i unplug the cable, the 'tone' goes away and i have nice clean noise clean you could eat off it...

(...this is a screenshot of 'realtime' analysis, so level values are +/-...)

*side note: and why is Signal Scope saying Duet2 has 2 ins and 4 outs...looking at the Duet2 it seems it is the exact opposite of that...
Old 24th December 2012
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stinkyfingers's Avatar

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Old 24th December 2012
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WDM's Avatar

Did you try unbalanced cables yet?
Old 24th December 2012
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stinkyfingers's Avatar

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yes, when i try unbalanced cables there is a lot of interference...
it actually picks up me tapping on my desk when i run a loop with 1/4 unbalanced cables...(no mic involved...)
Old 30th December 2012
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stinkyfingers's Avatar

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what's sad is that no one at Apogee can help me with this question...
talked to technical support 2 diff. times, all they both had to say was "huh"...
trying to get ahold of the engineer to explain...
Old 3rd October 2013
Here for the gear

in room eq wizard mine is equal. that wobble in the end of graphic...
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