Hello again!
The 'Vee One Suite' of 'old-school' software instruments,
* synthv1 [1] as a polyphonic subtractive synthesizer;
* samplv1 [2] a polyphonic sampler synthesizer;
* drumkv1 [3] as yet another drum-kit sampler;
* padthv1 [4] as a polyphonic additive synthesizer.
Are all being released as the second batch of the so called 'QStuff*'
(northern) Early-Summer'21 season.
Notable changes for this season are as follows:
- Fixed some ages old Glide/portamento potential crash bug (as reported
by AnClark, while on synthv1 [1]; also applies to samplv1 [2] and
padthv1 [4]).
- Add support for LV2 UI Windows platform (by AnClark, also while on
synthv1 [1]).
- Sustenuto pedal controller (MIDI CC#66) is now implemented.
- Fixed old Sustain/Damper/Hold pedal controller (MIDI CC#64) note-off
processing. (also implemented new on drumkv1 [3])
- Have some tolerance for buffer-size changes.
- All builds default to Qt6 (Qt >= 6.1) where available.
- CMake [12] is now the official build system.
As usual, all delivered in dual form:
- a pure stand-alone JACK client with JACK-session [5], NSM (Non Session
Management [6]) and both JACK MIDI and ALSA MIDI [7] input support;
- a LV2 instrument plug-in [8].
The 'Vee One Suite' are free, open-source Linux Audio [10] software,
distributed under the terms of the GNU General Public License (GPL) [11]
version 2 or later.
And again in detail...
**synthv1 - an old-school polyphonic synthesizer [1] **
    synthv1 0.9.23 (early-summer'21) is released!
    synthv1 is an old-school all-digital 4-oscillator subtractive
polyphonic synthesizer with stereo fx.
    LV2 URI: 
http://synthv1.sourceforge.net/lv2
website:
    
https://synthv1.sourceforge.io
    http://synthv1.sourceforge.net
project page:
    
https://sourceforge.net/projects/synthv1
downloads:
    
https://sourceforge.net/projects/synthv1/files
- source tarball:
    
https://download.sf.net/synthv1/synthv1-0.9.23.tar.gz
- source package:
    
https://download.sf.net/synthv1/synthv1-0.9.23-64.1.rncbc.suse.src.rpm
- binary packages (openSUSE Tumbleweed):
https://download.sf.net/synthv1/synthv1-jack-0.9.23-64.1.rncbc.suse.x86_84.…
https://download.sf.net/synthv1/synthv1-lv2-0.9.23-64.1.rncbc.suse.x86_84.r…
- AppImage [9] package (JACK stand-alone only):
    
https://download.sf.net/synthv1/synthv1-jack-0.9.23-64.1.x86_64.AppImage
git repos:
    
https://git.code.sf.net/p/synthv1/code
    https://github.com/rncbc/synthv1.git
    https://gitlab.com/rncbc/synthv1.git
    https://bitbucket.org/rncbc/synthv1.git
**samplv1 - an old-school polyphonic sampler [2]**
    samplv1 0.9.23 (early-summer'21) is released!
    samplv1 is an old-school polyphonic sampler synthesizer with stereo fx.
    LV2 URI: 
http://samplv1.sourceforge.net/lv2
website:
    
https://samplv1.sourceforge.io
    http://samplv1.sourceforge.net
project page:
    
https://sourceforge.net/projects/samplv1
downloads:
    
https://sourceforge.net/projects/samplv1/files
- source tarball:
    
https://download.sf.net/samplv1/samplv1-0.9.23.tar.gz
- source package:
    
https://download.sf.net/samplv1/samplv1-0.9.23-64.1.rncbc.suse.src.rpm
- binary package (openSUSE Tumbleweed):
https://download.sf.net/samplv1/samplv1-jack-0.9.23-64.1.rncbc.suse.x86_84.…
https://download.sf.net/samplv1/samplv1-lv2-0.9.23-64.1.rncbc.suse.x86_84.r…
- AppImage [9] package (JACK stand-alone only):
    
https://download.sf.net/samplv1/samplv1-jack-0.9.23-64.1.x86_64.AppImage
git repos:
    
https://git.code.sf.net/p/samplv1/code
    https://github.com/rncbc/samplv1.git
    https://gitlab.com/rncbc/samplv1.git
    https://bitbucket.org/rncbc/samplv1.git
**drumkv1 - an old-school drum-kit sampler [3]**
    drumkv1 0.9.23 (early-summer'21) is released!
    drumkv1 is an old-school drum-kit sampler synthesizer with stereo fx.
    LV2 URI: 
http://drumkv1.sourceforge.net/lv2
website:
    
https://drumkv1.sourceforge.io
    http://drumkv1.sourceforge.net
project page:
    
https://sourceforge.net/projects/samplv1
downloads:
    
https://sourceforge.net/projects/drumkv1/files
- source tarball:
    
https://download.sf.net/drumkv1/drumkv1-0.9.23.tar.gz
- source package:
    
https://download.sf.net/drumkv1/drumkv1-0.9.23-64.1.rncbc.suse.src.rpm
- binary package (openSUSE Tumbleweed):
https://download.sf.net/drumkv1/drumkv1-jack-0.9.23-64.1.rncbc.suse.x86_84.…
https://download.sf.net/drumkv1/drumkv1-lv2-0.9.23-64.1.rncbc.suse.x86_84.r…
- AppImage [9] package (JACK stand-alone only):
    
https://download.sf.net/drumkv1/drumkv1-jack-0.9.23-64.1.x86_64.AppImage
git repos:
    
https://git.code.sf.net/p/drumkv1/code
    https://github.com/rncbc/drumkv1.git
    https://gitlab.com/rncbc/drumkv1.git
    https://bitbucket.org/rncbc/drumkv1.git
**padthv1 - an old-school polyphonic additive synthesizer [4]**
    padthv1 0.9.23 (early-summer'21) is released!
    padthv1 is an old-school polyphonic additive synthesizer with stereo fx.
    padthv1 is based on the PADsynth algorithm by Paul Nasca, as a
special variant of additive synthesis.
    LV2 URI: 
http://padthv1.sourceforge.net/lv2
website:
    
http://padthv1.sourceforge.net
    https://padthv1.sourceforge.io
project page:
    
https://sourceforge.net/projects/padthv1
downloads:
    
https://sourceforge.net/projects/padthv1/files
- source tarball:
    
https://download.sf.net/padthv1/padthv1-0.9.23.tar.gz
- source package:
    
https://download.sf.net/padthv1/padthv1-0.9.23-64.1.rncbc.suse.src.rpm
- binary package (openSUSE Tumbleweed):
https://download.sf.net/padthv1/padthv1-jack-0.9.23-64.1.rncbc.suse.x86_84.…
https://download.sf.net/padthv1/padthv1-lv2-0.9.23-64.1.rncbc.suse.x86_84.r…
- AppImage [9] package (JACK stand-alone only):
    
https://download.sf.net/padthv1/padthv1-jack-0.9.23-64.1.x86_64.AppImage
git repos:
    
https://git.code.sf.net/p/padthv1/code
    https://github.com/rncbc/padthv1.git
    https://gitlab.com/rncbc/padthv1.git
    https://bitbucket.org/rncbc/padthv1.git
References:
   [1] synthv1 - an old-school polyphonic synthesizer
       
https://synthv1.sourceforge.io
       http://synthv1.sourceforge.net
   [2] samplv1 - an old-school polyphonic sampler
       
https://samplv1.sourceforge.io
       http://samplv1.sourceforge.net
   [3] drumkv1 - an old-school drum-kit sampler
       
https://drumkv1.sourceforge.io
       http://drumkv1.sourceforge.net
   [4] padthv1 - an old-school polyphonic additive synthesizer
       
https://padthv1.sourceforge.io
       http://padthv1.sourceforge.net
   [5] JACK Audio Connection Kit
       
https://jackaudio.org/
   [6] NSM, Non Session Management
       
http://non.tuxfamily.org/nsm/
   [7] ALSA, Advanced Linux Sound Architecture
       
https://www.alsa-project.org/
   [8] LV2, Audio Plugin Standard, the extensible successor of LADSPA
       
http://lv2plug.in/
   [9] AppImage, Linux apps that run anywhere
       
https://appimage.org/
[10] Linux Audio consortium of libre software for audio-related work
       
https://linuxaudio.org
[11] GNU General Public License
       
https://www.gnu.org/copyleft/gpl.html
[12] CMake, a cross-platform, open-source build system generator
       
https://cmake.org
See also:
    
https://www.rncbc.org/drupal/node/2258
Have fun && Stay safe && Healthy!
--
rncbc aka. Rui Nuno Capela