Electric piano model

Tim Kleinert · Posted: Thu May 13, 2004 8:02 am Post subject: Electric piano model

My first attempt at electric piano modeling. Here we go:

The pure fundamental is the only mode that can reside within a vibrating tine -like a tuning fork. Therefore, it's easily modelled with a single resonant filter, excitated by a "hammer" impulse. The resonance itself is controlled by a keyboard-gated AR envelope, and with each key release, a shapabale "damper noise" is triggered into the system as the resonance dies down. This models the damper touching the tine.

The characteristic overtones of a electric piano are caused by the interaction between the vibrating tine and the electromagnetic pickup. I attempted to model this by modulating the phase of a PhaseOsc at 0 Hz with the tine signal and adding asymmetric distortion. Since lower tines generate a higher vibration amplitude, I added keyboard-morph to the mod amount. It might have been more correct to morph the tine amplitude, but it works both ways.

IMPORTANT: The outputs of the voices are NOT gated by a master VCA. They all run straight together, just like in a "real" e-piano. That's the reason for the "thump" when you load this patch: That's the PhaseOsc of all voices being synced to zero (otherwise you get DC). Also there is a clicking sound when playing the first 19 notes -that's the voices that are being used for the first time. Afterwards they are OK.

It doesn't sound like a Fender Rhodes replica, but it has the right kind of "playing response" and "feeling". I added some characteristic processing, too. It's a very simple model. I kept it as simple as possible, in order to get many voices. It gets 19 voices from an unexpanded G2 -not bad at all.

tim

ElectricPiano2TK.pch2

Description:

electric piano model using basic modal synthesis

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ElectricPiano2TK.pch2

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mosc · Posted: Thu May 13, 2004 9:10 am Post subject:

This is very interesting to me. Many techniques here I need to learn. It's such a simple patch, but so expressive if you get in and fool with the parameters.

It sounds more organlike than piano like. How can you adjust the decay time (key held down).

bj2001 · Joined: Apr 15, 2004 Posts: 26 G2 patch files: 1

great
u did a good job.
really sounds good. Surprised

Tim Kleinert · Posted: Fri May 14, 2004 3:01 am Post subject:

stiiiiiiive · Posted: Thu Jul 30, 2009 11:30 am Post subject:

Hey Tim.

I had tried your Wurlitzer yet, but not this one. I've just got so much fun with it ! And I did not even touch the model parameters...

A contrario, I've made some adds in the FX section: there is a distortion selector now. Why ? Because I added along to your saturate module the Rob's soft clipper, as well as a little loop in order to use an extern unit (I own a SansAmp...).

The only Var 1 is modified. New parameters are mapped on page E3.

electricPno2tk+.pch2

Description:

Tim's first electric piano model (electricpiano_tk) with the Rob's soft clipper and an external loop as alternative distorsions.

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electricPno2tk+.pch2

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GovernorSilver · Posted: Thu Mar 29, 2012 6:25 pm Post subject:

Holy shi... it's amazing! Merci beaucoup tout le monde!!!