Yamaha CS80

Kent, 

Out of interest what model Boss pedal did you use for the phaser in your 
CS80 mods, was it a PH-3? You mentioned it had three modes, the PH-2 had two 
modes and the PH-3 has four modes...! 

Im still tyring to get over how bloody great those mods are...fantastic!! 

Regards,
Rob. 

> Hi again, 
> 
> I do retolex the 80's myself but without removing the insides, thank god :) 
> 
> You are right about the string sounds on the 80 though. This is why Vangelis 
> used a VP330 so much in his China and Spiral albums. It is possible to get 
> quite a strong rich string sound from the 80 is you feed the VCO's directly 
> into a Moog ladder filter or an ARP 2600 one. We tried that here for a new 
> mod were working on, and the results were very promising indeed. 
> 
> The Unison mod on my 80 is controlled by how many keys are pressed. So one 
> key = 16 voice, but if you press 3 key down after it without lifting the 
> first key you get four voice on each key and so forth. You still have poly 
> glide in mono mode too. In other words, if you play a four note chord up the 
> top of the keyboard, let go and then go to mono mode and press just the 
> bottom C, the chord you played first glides down in four voice per note and 
> then joins at the bottom C in a earth shattering sixteen voice mono note 
> that can shatter a cows pelvis at four hundred yards. 
> 
> 
>>From: "erikfromhere" <erikfromhere@...>
>>Reply-To: yamahacs80@yahoogroups.com
>>To: yamahacs80@yahoogroups.com
>>Subject: [yamahacs80] KSR mods
>>Date: Mon, 01 May 2006 19:59:54 -0000 
>>
>>Hi Kent, 
>>
>>thanks for the explenation. 64 vca-ic's, that's a lot of rare ic's.
>>I thought you would generate the extra lfo's digitally ;-)
>>Personally, I don't need the seperate lfo-mod. However, I find it
>>difficult to program nice string-sounds on the CS80. I don't even
>>come close to the strings of an prophet, jupiter or OB-8 etc.
>>There's allways too much or too little PWM. It just sounds to much
>>modulated and not as a rich stringsound. I don't know why, is it the
>>filter ? I guess (!) that having the PWM lfo phase-shifted for each
>>voice seperatly could give nice results, maybe a simple circuit
>>would do the trick ? Why would we need to have the PWM on all voices
>>phase-synced, I don't anyway ? 
>>
>>Can you explain the unison-mod a little ? Can you choose 2-,4- and 8-
>>voice ? Can you play a 2-unison 4-voice polyphonic etc etc ? 
>>
>>We would love to know what kind of mods can be done by you, maybe
>>some of us are interested in your modifications and have them let
>>done by you (as soon as you have your garden cleaned up). 
>>
>>Do you have the CS80's re-tolexed by yourself or is someone else
>>specialised in this ? I think it's a hell of a job, isn't it ?
>>I suspect you have a crane to lift the complete circuits out of the
>>case in one piece to give you room to retolex ;-) 
>>
>>Please go on restoring and fixing these great machines !
>>Erik 
>>
>>
>>--- In yamahacs80@yahoogroups.com, "kent spong" <kent_spong@...>
>>wrote:
>> >
>> > Hi Erik,
>> >
>> > Yes that's right. The 16 IG00150 VCO's are for the VCO, VCF and
>>VCA of the
>> > LFO section and are also controlled by the after touch too. The
>>only down
>> > side to this mod is the 64 IG00151 VCA IC's it uses. The whole
>>thing is
>> > switched in and out on the LFO EXT point on the waveshape slider
>>and also
>> > swiches out on the EXT Modulation socket on the back. So there is
>>no change
>> > to the front panel of the 80 at all. However,  I am working on a
>>totally
>> > faithfull replacment front panel for the 80 to restore one's that
>>have seen
>> > to much damage over the years. I want to keep these fantastic
>>machines going
>> > for as long as I can.
>> >
>> >
>> > 
>>
>> 
>>
>> 
>>
>>
>>Yahoo! Groups Links 
>>
>> 
>>
>> 
>>
>>
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