[A6] A6 sine osc

[Shawn O.]

I keep temp and background tuning off,. every day when I power them on I 
do a full tune ,.. all ocs, filters, VCA, doesnt make a difference.

Wayne Rudd wrote:

>Have you tried a VCA tune.?..came up on the list a little while ago that the 
>Auto Tune doesn't include the VCA's...you need to choose that specifically 
>from the tune menu.
>
>cheers, Wayne.
>
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>>------------------------------
>>
>>Message: 3
>>Date: Sat, 12 Mar 2005 21:06:49 -0800
>>From: "Shawn O." <sobrien at wavecable.com>
>>Subject: Re: [A6] A6 sine osc
>>To: Kim Johnsson <kim.johnsson at ineo.fi>,	A6 mailing list
>>	<a6 at code404.com>
>>Message-ID: <4233CA69.7070008 at wavecable.com>
>>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> >So, is this the standard A6 version of a sine wave, or is it just mine
>>
>>that's a bit bent?
>>
>>
>>I have 2 Andromeda's now and checked this out on both of them, same 
>>thing, this is at really low frequencies that this occurs,. happens with
>>
>>triangle and square waves as well, correct me if I am wrong I believe 
>>this is actually how the moog modular VCO of the time performed with its
>>
>>older component discrete construction,
>>
>>I would guess modules from Modcan and MOTM have much better tracking 
>>with producing sine waves that are pure at low frequency levels, both of
>>
>>those companies seem to be into producing analogue perfection.
>>
>>One thing that makes me scratch my head is how the same FM patch on two
>>
>>different Andromeda's does not sound the same at all, well even between
>>
>>different voice chips when you are cycling through on patches that use 
>>allot of FM,
>>
>>also of note, so far 2 out of 3 Andromeda's that I have had my hands on
>>
>>display an interesting amplification of white noise on at least 1 of the
>>
>>voices playing the patch Amsterdam kick patch in rotary mode (think this
>>
>>is preset1 81), on some voices the amplification of white noise is 
>>subtle, on others it is very noticeable, my work around for this is 
>>saving that patch to the user bank and turning the white noise off or 
>>assigning it to play on a voice that the noise is not noticeable.
>>
>>I think this is a problem with the way the ASIC's are manufactured where
>>
>>something gets screwy in the VCA portion of the chip during lithography,
>>
>>kind of makes me wounder how much better of an instrument this would be
>>
>>if the voice chips were larger or had 1 voice on each instead of 2.
>>
>>~Shawn O'Brien
>>
>>    
>>
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