Re: [LAU] Connie, an organ template for JACK

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To: <reuben.m@...>, <linux-audio-user@...>
Date: Sunday, May 31, 2009 - 11:10 am

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I get the click too=2C and also a bit of aliasing noise on my system but th=
at could just be me=2C did not test it widely.

The original keyboard did have a bit of keyclick however it was not as pron=
ounced as the Hammond and as such never got picked up as a character of the=
sound. Apart from that=2C the Hammond was popular also with jazz keyboardi=
sts=2C the Vox only ever really penetrated the rock market.

The Vox had the same multiple contacts under each key and again=2C pressing=
a key slowly would sound each harmonic separately=2C not noticeable really=
when playing - you have to like move the key with a micrometer screwguage =
to be able to hear them. Each key also had a separate generation PCB that d=
id the master oscillator division=2C waveform extraction from the master cl=
ock and this probably also had a key grooming circuit to reduce noise=2C es=
pecially shelving noise from the contacts (which was a large part of the Ha=
mmond sound). Most of the click I got from Connie only noticable on note_of=
f rather than note_on but both of these could be improved with a grooming c=
ircuit. Also=2C as with all frequency division circuits it was not an equal=
ly tempered scale - every note is an integral division of the master clock =
which I understand ran at 2MHz and some notes were up to 1.6 cents out. The=
re are kind of two issues with emulating that=2C firstly the midi tables he=
re are for ET pitch rather than integer division=2C and then each wave I th=
ink is separately generated thus has no phase relation since each voice her=
e looks like a separate phase accumultor. The phase accumulation probably h=
as little effect since your frequency tables are going to be very accurate =
although purists might argue that ET scaling vs. an organ divider circuit i=
s audible when playing chords.

The vibrato is perhaps a bit slow too and although the original be modified=
by a surface mounted pot I am sure that House of the Rising Sun=2C another=
Vox classic=2C had it run faster than this? The pot wasn't very accessible=
admittedly=2C and it was generally glued with that red paste to stop it fr=
om travelling however there were a few that had this pulled out to a panel =
mounted pot to be configurable=2C maybe only on the later Italian models af=
ter Jennings had sold the rights. Perhaps just out of interest more than an=
ything=2C the current rights to Vox and Continental is held by Korg Inc of =
Japan=2C not that they have done anything with rights to the organ. If you =
ever saw one of these keyboards it was pretty spectacular: reverse white/bl=
ack keys=2C bright orange panel and the still quite futuristic Z Bar frame.=
They should re-release it.=20

I have owned a couple of these over the years=2C an original very rare Jenn=
ings handbuilt with laquered wooden key action=2C extremely light touch=2C =
and then later the Italian plastic keyed dual manual Super. The latter actu=
ally had the original Z Bars (the Jennings model only came as is) but the s=
ound was not quite as warm as the handbuilt ones.

Regards=2C Nick.

> From: reuben.m@gmail.com

g a=20
rated=20
here
to
he

_________________________________________________________________
Show them the way! Add maps and directions to your party invites.=20
http://www.microsoft.com/windows/windowslive/products/events.aspx=

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I get the click too=2C and also a bit of aliasing noise on my system but th=
at could just be me=2C did not test it widely.The original keyboard=
did have a bit of keyclick however it was not as pronounced as the Hammond=
and as such never got picked up as a character of the sound. Apart from th=
at=2C the Hammond was popular also with jazz keyboardists=2C the Vox only e=
ver really penetrated the rock market.The Vox had the same multiple=
contacts under each key and again=2C pressing a key slowly would sound eac=
h harmonic separately=2C not noticeable really when playing - you have to l=
ike move the key with a micrometer screwguage to be able to hear them. Each=
key also had a separate generation PCB that did the master oscillator divi=
sion=2C waveform extraction from the master clock and this probably also ha=
d a key grooming circuit to reduce noise=2C especially shelving noise from =
the contacts (which was a large part of the Hammond sound). Most of the cli=
ck I got from Connie only noticable on note_off rather than note_on but bot=
h of these could be improved with a grooming circuit. Also=2C as with all f=
requency division circuits it was not an equally tempered scale - every not=
e is an integral division of the master clock which I understand ran at 2MH=
z and some notes were up to 1.6 cents out. There are kind of two issues wit=
h emulating that=2C firstly the midi tables here are for ET pitch rather th=
an integer division=2C and then each wave I think is separately generated t=
hus has no phase relation since each voice here looks like a separate phase=
accumultor. The phase accumulation probably has little effect since your f=
requency tables are going to be very accurate although purists might argue =
that ET scaling vs. an organ divider circuit is audible when playing chords=
.The vibrato is perhaps a bit slow too and although the original be=
modified by a surface mounted pot I am sure that House of the Rising Sun=
=2C another Vox classic=2C had it run faster than this? The pot wasn't very=
accessible admittedly=2C and it was generally glued with that red paste to=
stop it from travelling however there were a few that had this pulled out =
to a panel mounted pot to be configurable=2C maybe only on the later Italia=
n models after Jennings had sold the rights. Perhaps just out of interest m=
ore than anything=2C the current rights to Vox and Continental is held by K=
org Inc of Japan=2C not that they have done anything with rights to the org=
an. If you ever saw one of these keyboards it was pretty spectacular: rever=
se white/black keys=2C bright orange panel and the still quite futuristic Z=
Bar frame. They should re-release it. I have owned a couple of the=
se over the years=2C an original very rare Jennings handbuilt with laquered=
wooden key action=2C extremely light touch=2C and then later the Italian p=
lastic keyed dual manual Super. The latter actually had the original Z Bars=
(the Jennings model only came as is) but the sound was not quite as warm a=
s the handbuilt ones.Regards=2C Nick.&gt=3B From: reuben.m@=
gmail.com&gt=3B To: linux-audio-user@lists.linuxaudio.org&gt=3B Dat=
e: Sun=2C 31 May 2009 00:15:13 -0500&gt=3B Subject: Re: [LAU] Connie=2C=
an organ template for JACK&gt=3B &gt=3B &gt=3B Really like the=
sound of it. Has a bit of a harsh tick sound when pressing a &gt=3B ke=
y. Not sure if that's supposed to be a "key click" or if the audio generate=
d &gt=3B for a new note is just sent as-is without fading it in.&gt=
=3B &gt=3B -Reuben&gt=3B &gt=3B &gt=3B Check it=2C yo!: Mar=
tin Homuth-Rosemann was sayin:&gt=3B &gt=3B Hi=2C&gt=3B &gt=3B&=
gt=3B &gt=3B sorry=2C just realized that the hammond discussion mentioned b=
elow was here&gt=3B &gt=3B and not at LAD=2C so please allow this kind =
of "crosspost":&gt=3B &gt=3B&gt=3B &gt=3B this is my first post to =
LAD. The discussion about a hammond simulation&gt=3B &gt=3B "Fons could=
you make us..."=2C Beatrix and some research for writing a&gt=3B &gt=
=3B (german) wikipedia article (stub) about the Vox Continental inspired me=
to&gt=3B &gt=3B hack a quick organ program that simulates the internal=
signal flow of the&gt=3B &gt=3B "Connie" with JACK MIDI input and JACK=
audio output.&gt=3B &gt=3B Have fun:&gt=3B &gt=3B http://cryptomys=
.de/horo/Connie/Connie-0.1.tar.gz&gt=3B &gt=3B&gt=3B &gt=3B Ciao&gt=3B &gt=3B Martin Homuth-Rosemann&gt=3B &gt=3B &gt=3B _____=
__________________________________________&gt=3B Linux-audio-user maili=
ng list&gt=3B Linux-audio-user@lists.linuxaudio.org&gt=3B http://li=
sts.linuxaudio.org/mailman/listinfo/linux-audio-userSee all=
the ways you can stay connected to friends and family
=

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Messages in current thread:
[LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sat May 30, 9:30 am)
Re: [LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sat Jul 31, 5:48 pm)
Re: [LAU] Connie, an organ template for JACK, James Morris, (Sat Jul 31, 10:41 pm)
Re: [LAU] Connie, an organ template for JACK, Sampo Savolainen, (Sun Aug 1, 5:27 pm)
Re: [LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sun Aug 1, 6:17 am)
Re: [LAU] Connie, an organ template for JACK, Reuben Martin, (Sun May 31, 5:21 am)
Re: [LAU] Connie, an organ template for JACK, Nick Copeland, (Sun May 31, 11:10 am)
Re: [LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sun May 31, 1:29 pm)
Re: [LAU] Connie, an organ template for JACK, Fons Adriaensen, (Sun May 31, 5:21 pm)
[LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sun Jun 7, 10:30 am)
Re: [LAU] Connie, an organ template for JACK, Emanuel Rumpf, (Sun Jun 7, 12:58 pm)
Re: [LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sun Jun 7, 8:24 pm)
Re: [LAU] Connie, an organ template for JACK, Emanuel Rumpf, (Sun Jun 7, 9:28 pm)
Re: [LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Wed Jun 10, 9:13 pm)
Re: [LAU] Connie, an organ template for JACK, Fons Adriaensen, (Wed Jun 10, 9:45 pm)
[LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sun Jun 14, 9:14 pm)
Re: [LAU] Connie, an organ template for JACK, Fons Adriaensen, (Sun Jun 7, 2:38 pm)
Re: [LAU] Connie, an organ template for JACK, Nick Copeland, (Mon Jun 1, 9:01 am)
[LAU] Connie, an organ template for JACK, Martin Homuth-Rosemann, (Sun May 31, 4:19 pm)
Re: [LAU] Connie, an organ template for JACK, Norval Watson, (Sat May 30, 11:04 am)
Re: [LAU] Connie, an organ template for JACK, Jan Weil, (Sat May 30, 11:12 am)
Re: [LAU] Connie, an organ template for JACK, Norval Watson, (Sat May 30, 12:46 pm)