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

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To: <fons@...>, <linux-audio-user@...>
Date: Monday, June 1, 2009 - 9:01 am

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> Looking at the schematics there is no evidence of any=20

Nice information.=20

I never got to hook my Continentals up to a scope to have a good look at th=
em but I agree the sines were not all that pure so a tri would be possibly =
closer to the original than a sine waveformed lookup table as used by Conni=
e. I might actually give this a test in bristol and see how its Vox sounds =
with them=2C it also uses similar lookup tables. It would not be that diffi=
cult to fill them with heavily RC filtered square waves=2C even testing wit=
h some different slew rates and see what effect that has.

Your comments on the drawbar effects are very interesting=2C I had never co=
nsidered the Vox to have damping as the Hammond did but I would definately =
believe it. Do you happen to know if the schematics were from a Mark-I Jenn=
ings design? I would be interested in modeling some of the resistor circuit=
s as well.

Regards=2C Nick

_________________________________________________________________
Windows Live=99: Keep your life in sync. Check it out!
http://windowslive.com/explore?ocid=3DTXT_TAGLM_WL_t1_allup_explore_0120...

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&gt=3B Looking at the schematics there is no evidence of any &gt=3B 'cl=
ick removal' action. Also the waveforms summed there&gt=3B (for 4'=2C8'=
and 16') would not be sinewaves. Each divider&gt=3B output has an RC l=
owpass filter before going to the mix&gt=3B bus. Assuming the dividers =
generate square waves=2C the&gt=3B smoothest waveform you can get would=
be a triangular one.&gt=3B What each of these RC filters does exactly =
will depend on&gt=3B the impedance it sees on the mix bus=2C and this i=
s a complex&gt=3B function of the drawbar positions (*all* of them for =
each&gt=3B bus=2C since they share the resistors) and the number of=
&gt=3B notes already on.Nice information. I never got to ho=
ok my Continentals up to a scope to have a good look at them but I agree th=
e sines were not all that pure so a tri would be possibly closer to the ori=
ginal than a sine waveformed lookup table as used by Connie. I might actual=
ly give this a test in bristol and see how its Vox sounds with them=2C it a=
lso uses similar lookup tables. It would not be that difficult to fill them=
with heavily RC filtered square waves=2C even testing with some different =
slew rates and see what effect that has.Your comments on the drawba=
r effects are very interesting=2C I had never considered the Vox to have da=
mping as the Hammond did but I would definately believe it. Do you happen t=
o know if the schematics were from a Mark-I Jennings design? I would be int=
erested in modeling some of the resistor circuits as well.Regards=
=2C NickWindows Live=99: Keep your life in sync. Check it out!
=

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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)