Yamaha CS80

Hello everyone!

Good to see a bit of traffic here lately after a long lull.  I know why I've been so distracted and I assume most folks have lots of stuff going on in their lives.  

I'm finally getting back to a long-term CS80 renovation / mod project after moving and job changes and other fun stuff.  I have a question for any of the techie types here.   For review, all the digital logic in the beasts use standard (and mostly still available) CMOS chips.  These are old DIP packages that only fit a hand full of gates in each chip.  They are all run off of +8.5v and -6.5v.  This weird arrangement fits in the 15-volt supply that the chips can handle and being offset allows analog switch chips (e.g. 4051, 4016) to process the analog control voltages and audio signals that are bi-polar around zero volts.

So, I want to add a bunch of new logic including an FPGA (tons of re-programmable gates) and a processor (maybe Arduino).

Mojo V3 - FPGA Development Board

Again, the catch is that this board has 3.3volt digital I/O - which is actually pretty high compared to the latest chips!   So, I need to translate a lot of signals.  The old standbys were the 1488 and 1489 chips that were design to translate from 5volt TTL to +/- 12v (or lower) for RS-232 serial ports.  I might be able to use these but they would take up a ton of room and I'm not sure if they'll work with 3.3volt instead of 5volt.  I looked around a bit yesterday but found tons and tons of possible chips and was hoping someone here might know a good chip to use.  I'd like something that's 3.3volt on one side and up to the +8.5v/-6.5v Yamaha levels on the other side.  DIP or SOIC package would be fine and I'd like 8 or more channels in each chip with versions for one-way and bi-directional.

Any ideas on this idea in general?  On the Mojo board?  On the level-shifters?

Thanks and hope everyone is having a happy, music-filled summer!

 David

 

just that 3 more vids are coming out, the 24th  29th and July 3rd 

16 days and counting down https://yamahasynth.com/

---- On Sun, 21 Jun 2015 19:03:32 -0500 David Rogoff david@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----

 

Anyone have more info on this?  First I’ve heard of it.

 David

On Jun 21, 2015, at 2:14 PM, laurie laurie@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:

anyone see this yet?

https://www.youtube.com/watch?v=Rdj2EqO6WiE



---- On Sat, 20 Jun 2015 14:44:46 -0500 david@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ---- 

Hello everyone!

Good to see a bit of traffic here lately after a long lull.  I know why I've been so distracted and I assume most folks have lots of stuff going on in their lives.  

I'm finally getting back to a long-term CS80 renovation / mod project after moving and job changes and other fun stuff.  I have a question for any of the techie types here.   For review, all the digital logic in the beasts use standard (and mostly still available) CMOS chips.  These are old DIP packages that only fit a hand full of gates in each chip.  They are all run off of +8.5v and -6.5v.  This weird arrangement fits in the 15-volt supply that the chips can handle and being offset allows analog switch chips (e.g. 4051, 4016) to process the analog control voltages and audio signals that are bi-polar around zero volts.

So, I want to add a bunch of new logic including an FPGA (tons of re-programmable gates) and a processor (maybe Arduino).

Mojo V3 - FPGA Development Board

Mojo V3 - FPGA Development Board

The Mojo is an FPGA development board with an Arduino compatible microcontroller on board. It is designed to be easy to use and a great introduction...

View on embeddedmicro.com

Preview by Yahoo 

Again, the catch is that this board has 3.3volt digital I/O - which is actually pretty high compared to the latest chips!   So, I need to translate a lot of signals.  The old standbys were the 1488 and 1489 chips that were design to translate from 5volt TTL to +/- 12v (or lower) for RS-232 serial ports.  I might be able to use these but they would take up a ton of room and I'm not sure if they'll work with 3.3volt instead of 5volt.  I looked around a bit yesterday but found tons and tons of possible chips and was hoping someone here might know a good chip to use.  I'd like something that's 3.3volt on one side and up to the +8.5v/-6.5v Yamaha levels on the other side.  DIP or SOIC package would be fine and I'd like 8 or more channels in each chip with versions for one-way and bi-directional.

Any ideas on this idea in general?  On the Mojo board?  On the level-shifters?

Thanks and hope everyone is having a happy, music-filled summer!

 David

> I assure you, my CS80 has been portable and used live since 1979...
> last road trip was 2013 and has been moved to 3 locations since that...
>
> I also know lighter and more portable applies to every other piano type keyboard besides a real piano :)
>
> can't wait..
>
>
> ---- On Mon, 22 Jun 2015 03:47:22 -0500 Tommy Priakos tpriakos@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----
>
>
> Also there seems to be some portability aspect to reface...
> "Get ready to create your sound any place, any time."
> The keyboard made by "someone who plays the piano" seems contradictory to the portable aspect, however.
>
>
> Yamaha filed the application to trademark the name, "reface" last year (June 5, 2014).
>
>
> All will soon be revealed.
>
>
> Tommy
>
>
>
> On Jun 21, 2015, at 11:11 PM, laurie laurie@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:
>
>
>
> just that 3 more vids are coming out, the 24th 29th and July 3rd
>
> 16 days and counting down https://yamahasynth.com/
>
>
>
> ---- On Sun, 21 Jun 2015 19:03:32 -0500 David Rogoff david@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----
>
>
> Anyone have more info on this? First I’ve heard of it.
>
>
> David
>
>
>
> On Jun 21, 2015, at 2:14 PM, laurie laurie@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:
>
>
>
> anyone see this yet?
>
> https://www.youtube.com/watch?v=Rdj2EqO6WiE
>
>
>
> ---- On Sat, 20 Jun 2015 14:44:46 -0500 david@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----
>
>
>
> Hello everyone!
>
>
> Good to see a bit of traffic here lately after a long lull. I know why I've been so distracted and I assume most folks have lots of stuff going on in their lives.
>
>
> I'm finally getting back to a long-term CS80 renovation / mod project after moving and job changes and other fun stuff. I have a question for any of the techie types here. For review, all the digital logic in the beasts use standard (and mostly still available) CMOS chips. These are old DIP packages that only fit a hand full of gates in each chip. They are all run off of +8.5v and -6.5v. This weird arrangement fits in the 15-volt supply that the chips can handle and being offset allows analog switch chips (e.g. 4051, 4016) to process the analog control voltages and audio signals that are bi-polar around zero volts.
>
>
>
>
> So, I want to add a bunch of new logic including an FPGA (tons of re-programmable gates) and a processor (maybe Arduino).
>
>
>
>
> Mojo V3 - FPGA Development Board
>
>
>
>
>
>
>
>
>
> Mojo V3 - FPGA Development BoardThe Mojo is an FPGA development board with an Arduino compatible microcontroller on board. It is designed to be easy to use and a great introduction...
>
>
>
>
>
> View on embeddedmicro.com
> Preview by Yahoo
>
>
>
>
>
>
>
> Again, the catch is that this board has 3.3volt digital I/O - which is actually pretty high compared to the latest chips! So, I need to translate a lot of signals. The old standbys were the 1488 and 1489 chips that were design to translate from 5volt TTL to +/- 12v (or lower) for RS-232 serial ports. I might be able to use these but they would take up a ton of room and I'm not sure if they'll work with 3.3volt instead of 5volt. I looked around a bit yesterday but found tons and tons of possible chips and was hoping someone here might know a good chip to use. I'd like something that's 3.3volt on one side and up to the +8.5v/-6.5v Yamaha levels on the other side. DIP or SOIC package would be fine and I'd like 8 or more channels in each chip with versions for one-way and bi-directional.
>
>
> Any ideas on this idea in general? On the Mojo board? On the level-shifters?
>
>
> Thanks and hope everyone is having a happy, music-filled summer!
>
>
> David
>
>
>
>
>
>
>
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>
>
>
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A nice keyboard action would mean hopefully Polyphonic Aftertouch. :-)

 

I assure you, my CS80 has been portable and used live since 1979...
last road trip was 2013 and has been moved to 3 locations since that...

I also know lighter and more portable applies to every other piano type keyboard besides a real piano :)

can't wait..

---- On Mon, 22 Jun 2015 03:47:22 -0500 Tommy Priakos tpriakos@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----

 

Also there seems to be some portability aspect to reface...

"Get ready to create your sound any place, any time." 

The keyboard made by "someone who plays the piano" seems contradictory to the portable aspect, however.

Yamaha filed the application to trademark the name, "reface" last year (June 5, 2014).

All will soon be revealed.

Tommy

On Jun 21, 2015, at 11:11 PM, laurie laurie@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:

 

just that 3 more vids are coming out, the 24th  29th and July 3rd 

16 days and counting down https://yamahasynth.com/

---- On Sun, 21 Jun 2015 19:03:32 -0500 David Rogoff david@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----

 

Anyone have more info on this?  First I’ve heard of it.

 David

On Jun 21, 2015, at 2:14 PM, laurie laurie@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:

anyone see this yet?

https://www.youtube.com/watch?v=Rdj2EqO6WiE



---- On Sat, 20 Jun 2015 14:44:46 -0500 david@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ---- 

Hello everyone!

Good to see a bit of traffic here lately after a long lull.  I know why I've been so distracted and I assume most folks have lots of stuff going on in their lives.  

I'm finally getting back to a long-term CS80 renovation / mod project after moving and job changes and other fun stuff.  I have a question for any of the techie types here.   For review, all the digital logic in the beasts use standard (and mostly still available) CMOS chips.  These are old DIP packages that only fit a hand full of gates in each chip.  They are all run off of +8.5v and -6.5v.  This weird arrangement fits in the 15-volt supply that the chips can handle and being offset allows analog switch chips (e.g. 4051, 4016) to process the analog control voltages and audio signals that are bi-polar around zero volts.

So, I want to add a bunch of new logic including an FPGA (tons of re-programmable gates) and a processor (maybe Arduino).

Mojo V3 - FPGA Development Board

Mojo V3 - FPGA Development Board

The Mojo is an FPGA development board with an Arduino compatible microcontroller on board. It is designed to be easy to use and a great introduction...

View on embeddedmicro.com

Preview by Yahoo 

Again, the catch is that this board has 3.3volt digital I/O - which is actually pretty high compared to the latest chips!   So, I need to translate a lot of signals.  The old standbys were the 1488 and 1489 chips that were design to translate from 5volt TTL to +/- 12v (or lower) for RS-232 serial ports.  I might be able to use these but they would take up a ton of room and I'm not sure if they'll work with 3.3volt instead of 5volt.  I looked around a bit yesterday but found tons and tons of possible chips and was hoping someone here might know a good chip to use.  I'd like something that's 3.3volt on one side and up to the +8.5v/-6.5v Yamaha levels on the other side.  DIP or SOIC package would be fine and I'd like 8 or more channels in each chip with versions for one-way and bi-directional.

Any ideas on this idea in general?  On the Mojo board?  On the level-shifters?

Thanks and hope everyone is having a happy, music-filled summer!

 David

On Jun 22, 2015, at 10:11 PM, Tommy Priakos tpriakos@... [yamahacs80] wrote:

Was the KX88 the last polyphonic aftertouch keyboard Yamaha made? How long ago was that?

Sent from my iPhone

On Jun 22, 2015, at 7:31 AM, g.poropat@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:

A nice keyboard action would mean hopefully Polyphonic Aftertouch. :-)

 

I thought the DX1 was the last

---- On Mon, 22 Jun 2015 08:22:00 -0500 Daniel Forró danforcz@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----

 

1984, no polyphonic aftertouch.

Daniel Forro

On Jun 22, 2015, at 10:11 PM, Tommy Priakos tpriakos@... [yamahacs80] wrote:

Was the KX88 the last polyphonic aftertouch keyboard Yamaha made? How long ago was that?

Sent from my iPhone

On Jun 22, 2015, at 7:31 AM, g.poropat@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:

A nice keyboard action would mean hopefully Polyphonic Aftertouch. :-)

Looks like Joke :-)

 

Looks like Joke :-)

On Jul 8, 2015, at 10:46 AM, Tommy Priakos tpriakos@... [yamahacs80] wrote:

I am going to reserve judgment on these products. Back when I first played a (brand new) CS-80 at a music store I had no idea of its potential until I heard UK's Eddie Jobson and Vangelis using it on their albums.  The reface CS sounded like it has promise - in the right hands.

> On 8 Jul 2015, at 7:00 pm, Timothy Siefkes tim_s@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:
>
>
> That’s no CS-80 replacement... Sorry, Yamaha.
>
> ------------------------------------
>
> ------------------------------------
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>

I know!

And not once, but in other reface videos/livestreams Nate Tschetter keeps saying "C.S." stood for "control synth"  : (

I hope he is told "Combo" is the proper term here before NAMM gets underway tomorrow...Hopefully someone there will help him see the light. If not, I may have to go there myself and straighten him out!

Now, I need my CS-80 repaired...any reputable techs near the Houston-Dallas-St. Louis-Chicago range of Longitudes?

I'm willing to drive it to any of these places or points in-between.

Sincerely,

Tommy Priakos