Alesis Andromeda A6

--- In Andromeda_A6-ION@yahoogroups.com, "JR" <tactilius@y...> wrote:
> Just got a new A6, been doing a lot of tweaking and experimenting.  
> I found that the Aux outputs sound about 500% better than the main 
>outs, to my ears-  
> sounds like an imitation of itself.  
> The difference in sound is makes me think there could even be a A/D 
>conversion stage 
> going on in there- whatever it is, it's gnarly.  
>

I've done some tests myself (over a year ago), and I believe that the 
results were somewhat strange. I tested the A6 two times, and did a 
spectral analysis of various tones.  I also turned off all FX and 
distortion.  The first test result showed that the MAIN output had a 
noticible dip in the lower frequencies and higher freq. had their 
peaks slightly lowered... As if the sound was compressed coming out 
of MAIN.  The AUX in contrast, was louder and had high freq peaks 
intact and low end had no dip.  Bringing down the Volume of the MAIN 
seemed to bring it closer to the AUX spectrum.  

The second test showed none of the results above.  It showed the same 
response, except for the sound being louder on the AUX.

Now as far as I remember, the MAIN is ALL analog, except for a side 
chain FX channel that gets added before the MAIN potentiometer 
(volume knob).  Some people claimed that the longer signal chain 
might be the culprit, but I'm not to sure about the validity of 
this.  I think the volume pot itself is affecting the response curve, 
dependant on the incoming voltage.  I do NOT believe that there is 
any DA/AD conversion causing the curve to dip.

My next test is to try a frequency 'sweep' and calibrate to a 
specific set of levels.  Perhaps I can see if there truly is a reason 
for this, other than just 'louder output'.