An Emulation of the EMT140 Plate Reverberator Using a Hybrid Reverberator Structure
Announcement: DSP Seminar Friday October 2, 2009, 2:15pm
For this week's DSP Seminar, Aaron Greenblatt will preview his AES paper on
modeling the EMT 140 plate reverberator using a hybrid convolutional-FDN
structure (abstract follows). We will meet in the classroom at 2:15 PM.
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An Emulation of the EMT140 Plate Reverberator Using a Hybrid Reverberator
Structure
A digital emulation of the Elektromesstechnik (EMT) 140 plate reverberator is
presented. The EMT 140 consists of a resonant signal plate and a moveable
damping plate; it is approximately linear and time invariant, and its impulse
response is characterized by a whip-like onset and high echo density. Here,
the hybrid reverberator proposed by Stewart and Murphy, in which a short
convolution is run in parallel with a feedback delay network (FDN), is used
to model the plate. The impulse response onset is only weakly dependent on
the damping control, and is modeled by the convolution; the FDN is fit to the
impulse response tail. The echo density, equalization and decay rates are
matched at the transition between the convolution and FDN.