[A6] re: some waveform observations III

[Demokid]

Hi

How old is your A6 and what serial number does you unit have? I bought my 
new in the spring 2003 and I don't think the tuning is so bad. I have the 
Temp and background tuning turned off to get more warmth and soul in the 
sound.
Might it be different revisions of the voice boards on early units?

Regards
Demokid

----- Original Message ----- 
From: "leo" <leo.lydia at wanadoo.nl>
To: <a6 at code404.com>
Sent: Friday, December 10, 2004 1:58 PM
Subject: [A6] re: some waveform observations III


> maybe on this continuing story it would be good to give some insight in 
> how the question originally came to life:
> after buying my A6 I soon noticed the autotune didn't tune like b.e. that 
> of my jupiter 8. beating kept occuring and in a range specific for each 
> different voices. it seemed as if some voices simply where better then 
> others .two or four seemed to be beating just too fast (4hz or more). 
> wondering when to speak of an objective problem which should be fixed i 
> contacted alesis and ask for the technicalspecifications of the 
> oscillatorrange. short to say, i'm still waiting for that.
> so i started to measure myself and found the values i discribed above .
> also i found strange very audible differences between the filtervca chips 
> (patch can be downloaded at patchswapside also mentioned before).
> last finding was a keyboardtracking of the oscillators of plus or minus 
> 8cent between a2/ a4/a6
> a very friendly man of the alesis service in my region looked very 
> seriously at all this and firstly stated that no real (software or 
> hardware) callibration could be made besides the already mentioned 
> autotune functions.
> so first step was replacing the most deviant voice and vcf chips with 
> newer ones. and yes THIS   reduced the  problem and brought them more in 
> line. The keyboardtracking problem could not be solved on that time, no 
> callibration functions either!
> second repair was made when half the outputs (main le+aux ri) gave up. (if 
> this had also anything to do with a tip in the tips and tricks under 
> looping your out with ext-in w'll never know, i however strongly suggest 
> to remove that tip from the tips and tricks to avoid any futherproblems).
> as by this time measurements on also an A6 of a good friend of mine had 
> shown  that the keyboard clearly was out of range ( the oscillators 
> however showed the same deviation), this time the whole soundboard was 
> swapped as was the in/outboard.
> and yes, the keyboard now is in a +/-1cent range, which is a relieve, the 
> oscillators and filters however show the same deviation as with the old 
> board after the first repair (now on other voices) .alltogether i 'm sure 
> this is the best i can get and am really happy with it.
> this brings me to the following questions:
> 1 why doesn't alesis be more open on the technical specifications
> 2 wouldn't it be a good idea to buy a bunch of  replacement osc and filter 
> chips, which seem to be more closely related in regards to their technical 
> specs, swap them with the worst voices and thatway just get a better 
> instrument.(cost's a bit , i agree)
> 3 wouldn't it be a good idea to , also on this side, discussed more openly 
> also the what weaker sides of the A6 design, so that in the end everybody 
> is more able to improve it's instrument and steermanship.
>
> yours sincerly, sunny