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Thread

CS-60 Sustain issue

2016-08-10 by sneakyflute@...

Hi,

I'm not certain that the sustain functions are working correctly on my CS-60. It seems as if the notes in Sustain I are being cut off when they are not supposed to be.

Here is one environment where I can hear something odd:

1) I close down the low pass filter and set a long release on the panel (2-3 seconds at least)

2) I then play a chord and then hit a short note on the lowest C (picked only because it will make the oddity more noticeable).

3) I would expect that hitting this lowest C would NOT kill the chord as it is is releasing, since in Sustain I all releases are independent. BUT it DOES kill off the entire chord.

4) Next issue is that if I quickly hit a middle C key while listening to the final moments of the release from the low C (which killed off the other chord), this causes the first hit low C note to suddenly get louder AND the chord that was previously cut off returns (provided the release is still within its originally set time frame/trajectory), and it even sounds like its filter is opening again.

Is this weird behavior, or is this how Sustain I should work?

I should note that the ribbon is currently removed for repair, in case that somehow affects release times (not sure why it would though).

Thanks DT

Re: [yamahacs80] CS-60 Sustain issue

2016-08-10 by David Rogoff

Hi DT.

I think I know the effect you are talking about and it’s normal - if not what you’d want. The problem is that that there are 3 DACs that each output the voltages corresponding to the notes played. The main one is on the KAS board and each of the 8 voltages go through sample/hold circuits on the KAS and S/H boards. This is where the Sustain I/II logic comes in and freezes (or not) and note voltages. However, the KBC boards also have DACs which are used for the Keyboard Control Brilliance/Level High/Low. These don’t have the sample/hold circuits or “know” about the Sustain mode. So, you play a high note with a long sustain in Sustain I (or is it II - I forget) and then hit a low key. The high note is still sounding but its filter/volume could suddenly change if the Keyboard Control knobs aren’t at their center positions since the keyboard scanner will tell the DACs that all 8 notes are that low note.

Hope that makes some sense.

David

On Aug 10, 2016, at 4:14 AM, sneakyflute@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:

Hi,
I'm not certain that the sustain functions are working correctly on my CS-60. It seems as if the notes in Sustain I are being cut off when they are not supposed to be.
Here is one environment where I can hear something odd:
1) I close down the low pass filter and set a long release on the panel (2-3 seconds at least)
2) I then play a chord and then hit a short note on the lowest C (picked only because it will make the oddity more noticeable).
3) I would expect that hitting this lowest C would NOT kill the chord as it is is releasing, since in Sustain I all releases are independent. BUT it DOES kill off the entire chord.
4) Next issue is that if I quickly hit a middle C key while listening to the final moments of the release from the low C (which killed off the other chord), this causes the first hit low C note to suddenly get louder AND the chord that was previously cut off returns (provided the release is still within its originally set time frame/trajectory), and it even sounds like its filter is opening again.
Is this weird behavior, or is this how Sustain I should work?
I should note that the ribbon is currently removed for repair, in case that somehow affects release times (not sure why it would though).
Thanks DT

Re: [yamahacs80] CS-60 Sustain issue

2016-08-11 by laurie

you are experiencing some of the features of the cs60s 80s... in sus 1 the releasing portions are controllable by the scaling.... if you have the Low portion of the keyboard with less vca and a brighter filter, those attributes will be added to the releasing stage.... things not able to be modulated upon release in sus 1 are pitch (ribbon)... if you play a chord in the middle and let it release and play the high zone with a VCA boost and a VCF cut, that will affect the middle hanging notes the same way....

I use my CS80 like this rhythmically to create a manual type of sequence playing... playing rythmically in and out of lower and upper regions

---- On Wed, 10 Aug 2016 06:14:11 -0500 sneakyflute@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote ----

Hi,

I'm not certain that the sustain functions are working correctly on my CS-60. It seems as if the notes in Sustain I are being cut off when they are not supposed to be.

Here is one environment where I can hear something odd:

1) I close down the low pass filter and set a long release on the panel (2-3 seconds at least)

2) I then play a chord and then hit a short note on the lowest C (picked only because it will make the oddity more noticeable).

3) I would expect that hitting this lowest C would NOT kill the chord as it is is releasing, since in Sustain I all releases are independent. BUT it DOES kill off the entire chord.

4) Next issue is that if I quickly hit a middle C key while listening to the final moments of the release from the low C (which killed off the other chord), this causes the first hit low C note to suddenly get louder AND the chord that was previously cut off returns (provided the release is still within its originally set time frame/trajectory), and it even sounds like its filter is opening again.

Is this weird behavior, or is this how Sustain I should work?

I should note that the ribbon is currently removed for repair, in case that somehow affects release times (not sure why it would though).

Thanks DT

Re: CS-60 Sustain issue

2016-08-11 by D T

Hi,

Thank you both for your detailed answers. The brilliance controls do affect how much of what I called an “oddity” is present (in the center position, it seems to go away), so both of your descriptions make perfect sense with what I am hearing. Great to know that nothing is wrong with my CS.

best,

DT