So we're talking about 5-7 ms vs 10-15 ms latency and quite a big difference in terms of distortion and noise. Then your card will add some 7 to 10 milliseconds of latency round trip, or half that if you just use its D/A conversion only, and add about half the noise and distortion. Very fast, not too great in terms of noise and linearity, so you already lose something. I don't know the exact Axe latency numbers, but I'd guess it's something less than 2 ms for A/D, 110 dB dynamic range, average distortion. If you connect Axe digitally, you skip two conversion steps and two analog amp stages. Then it all goes to your 828, to its preamp, A/D, then your computer's buffer, then D/A conversion again and then to your monitors via another amp. Each time you get latency, quite a lot of noise and some distortion. First, it all goes through Axe's digital to analog converters, again not really stellar. If you then plug your Axe into your card's analog inputs, things get really messy. These are by no means stellar to begin with. Think about it this way - when you plug your guitar into Axe FX, the signal goes through its input circuitry, a preamp and an analog to digital converter. But if there is a simple solution, please let me know. I feel like I'm going around in circles, and I need to start again at square one. The only way I could hear the Axe II was to physically plug it back into the MOTU.
#MOTU 828 SETUP MAC#
I'm sure this is a complete noob question,but what's the fix? Do I disable the outputs to the MOTU? (Is there any reason at all to have the Axe connected directly to the MOTU?) If I just want to jam through the Axe II and not record, is it possible to do so without arming a track in Logic? I tried last night, and even though my Mac was getting signal from the Axe II, I couldn't figure out a way to hear any output (and I chose all of the different options in System Prefs/Sound). The latency is different for each, and there's a kind of doubling effect. I hear the audio that is sent through the Mac to Logic *and* the audio that is sent straight to the MOTU. It certainly works great that way.īut if I want to record (with Logic X), I discovered that there's a problem. To play through the Axe II, I have been assuming that I had to have it connected to my MOTU directly, and then the audio would go through the MOTU and out to my monitors. The main outs of my MOTU are connected to my monitors. I also have my Axe II L/R outputs going to two inputs on my MOTU 828. I have my Axe II connected to my iMac via USB.
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