When switching presets, the current preset continues to sound with the new sound

[Ralf B]

Hello,

when I play a preset with release and then switch to the next preset before the final fade-out, it continues to sound in the new preset - but with the sound of the new preset.
Check switching from U1 P1 to U1 P2.
Is this normal?

[creativespiral]

Hello,

when I play a preset with release and then switch to the next preset before the final fade-out, it continues to sound in the new preset - but with the sound of the new preset.
Check switching from U1 P1 to U1 P2.
Is this normal?

Do those two presets share the same Effects type?   I think it might be the case that if the effect stays the same, it may trail into the next patch.

There was some changes made a couple firmware updates back (1.1.5.6:   Bug Fix: Patch parameters on some presets cause corruption of sound when navigating to other presets)...  if you don't have the latest firmware, you might try updating to that. 

[Ralf B]

Hello,

thanks a lot for your reply.

The problem is the same when I turn the effects of.
It's a new REV2 16 with os1.2.1

One example are the factory presets F1 P1 LosVangelis2041 switched to F1 P2 All That Glitter.
Can you try this with your REV2?

[creativespiral]

Hello,

thanks a lot for your reply.

The problem is the same when I turn the effects of.
It's a new REV2 16 with os1.2.1

One example are the factory presets F1 P1 LosVangelis2041 switched to F1 P2 All That Glitter.
Can you try this with your REV2?

I overwrote all my Factory banks with custom patches, so I don't have those two specific ones.   But I just did a bit more testing with some of my single layer patches without effects.  Think I figured out what causes trails on some...  it's sending Note Off upon changing patches... but if the amp is still open on voices, the synth has to close down the amps... seems that maybe its using whatever the quicker release time between the two patches in question to close down the amps.   ie:  if you have a patch with minimal/no release time, it immediately shuts down the amp on patch change... but if you've got two patches with longer release times, the release trails will ring out.   

I could see this being beneficial in some scenarios with similar patch designs where you want a more subtle changeover... ie: switching between two Pad or Brass sounds...   but for patches that are significantly different with ADR timings, might not be ideal.   The optimal setup, IMO, would be having both "seamless changeover" and "instant silence" as an option in globals menu, where the seamless option would keep the current sound/voices playing with their sound design (even possibly with sustain pedal held), and the "instant silence" would force release timings to 0 and turn off the note right before patch change.   (the true seamless patch switchovers is a pretty big architecture ask though, as it requires keeping multiple programs in memory and keeping voices allocated until they are truly off)   Think Seq is done with firmware updates on Rev 2 though... but maybe an option in future synths. 

[Ralf B]

Thank you very much for your detailed answer and your tests. First of all, I'm glad that my REV2 doesn't have a fault.
I will report this to Sequential.

Have a nice weekend
Ralf

[kris]

I always thought that would be an artifact of the analogueness of the synth - once you change the parameters, it will immediately effect all voices. There is probably no memory for voice-specific parameters (it would  need to be 16 times multitimbral for this?). But then I know near nothing about synth design.

Because I was as annoyed by the behavior, I once wrote code for the KnobKraft Orm that would switch a patch not by sending the sysex, but rather a flood of CC/NRPN messages that would morph the one sound into the other. Of course, not much control over the order of parameters changed, but it would actually be pretty quick and would avoid the nasty note off.

If you don't transfer the sequencer data, the synth has only about 160 parameters per layer IIRC, that would be about 4k of MIDI for both layers with 12 bytes per NRPN. This can be transmitted pretty quickly even over the MIDI jacks, and sounds nice.

Now that I talk about it I need to unearth that code... https://github.com/christofmuc/KnobKraft-orm/issues/305

[Ralf B]

Thanks for your info, Kris.

[hoodoo_ray]

From my experience this is perfectly normal behaviour from any analog synth when changing presets

Edit - should say, most analog synths unless something very specific is implemented, for example some of the Elektron stuff with soundlocks etc

[Ralf B]

I know this from most synths, that the sound is simply cut off when changing presets.
With a few synths, the original sound still fades out despite the preset change.
But no matter, with the REV2 it is the way it is.

[hoodoo_ray]

I know this from most synths, that the sound is simply cut off when changing presets.
With a few synths, the original sound still fades out despite the preset change.
But no matter, with the REV2 it is the way it is.

This happens with the P6, P08, OB6, PX too

[kris]

True. Though there are synths, I think for example the DW 8000, which allow you to keep playing without the forced note off, so while you're holding down the keys, you can actually switch the patch without interruption. Works great for patches with a long release or even with no decay like an organ.