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<H2>
fmbell, fmrhode, fmwurlie, fmmetal, fmb3, fmpercfl</H2>
<PRE> a1 <B>fmbell</B> kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn
a1 <B>fmrhode</B> kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn
a1 <B>fmwurlie</B> kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn
a1 <B>fmmetal</B> kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn
a1 <B>fmb3 </B> kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn
a1 <B>fmpercfl </B> kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn
<HR></PRE>
<H4>
<BR>
<U>DESCRIPTION</U></H4>
A family of FM sounds, all using 4 basic oscilators and various architectures,
as used in the TX81Z synthesiser.
<BR>
<H4>
<U>INITIALIZATION</U></H4>
All these opcodes take 5 tables for initialisation. The first 4 are
the basic inputs and the last is the low frequency oscillator (LFO) used
for vibrato. The last table should usually be a sine wave.
<BR>
<P>For the other opcodes the initial waves should be as in the table:
<P><TT>
ifn1 ifn2
ifn3 ifn4</TT>
<BR><TT>fmbell sinewave
sinewave sinewave sinewave</TT>
<BR><TT>fmrhode sinewave
sinewave sinewave fwavblnk</TT>
<BR><TT>fmwurlie sinewave
sinewave sinewave fwavblnk</TT>
<BR><TT>fmmetal sinewave
twopeaks twopeaks sinewave</TT>
<BR><TT>fmb3 sinewave
sinewave sinewave sinewave</TT>
<BR><TT>fmpercfl sinewave
sinewave sinewave sinewave</TT>
<P>The sounds produced are then:
<P><TT>fmbell Tubular Bell</TT>
<BR><TT>fmrhode Fender Rhodes
Electric Piano</TT>
<BR><TT>fmwurlie Wurlitzer Electric Piano</TT>
<BR><TT>fmmetal "Heavy Metal"</TT>
<BR><TT>fmb3 Hammond
B3 organ</TT>
<BR><TT>fmpercfl Percussive Flute</TT>
<H4>
<U>PERFORMANCE</U></H4>
A note is played on a maraca-like instrument, with the arguments
as below.
<P><I>kamp</I> - Amplitude of note.
<P><I>kfreq</I> - Frequency of note played.
<P><I>kc1, kc2 --</I> Controls for the synthesizer, as in the table:
<P><TT>
kc1
kc2
Algorithm</TT>
<BR><TT>fmbell Mod index 1
Crossfase of two outputs 5</TT>
<BR><TT>fmrhode Mod index 1
Crossfase of two outputs 5</TT>
<BR><TT>fmwurlie Mod index 1
Crossfase of two outputs 5</TT>
<BR><TT>fmmetal Total mod index Crossfade
of two modulators 3</TT>
<BR><TT>fmb3 Total
mod index Crossfade of two modulators 4</TT>
<BR><TT>fmpercfl Total mod index Crossfade
of two modulators 4</TT>
<P>kvdepth -- Vibrator depth
<P>kvrate -- Vibrator rate
<BR>
<H4>
<U>AUTHOR:</U></H4>
John ffitch
<BR>University of Bath, Codemist Ltd.
<BR>Bath, UK
<BR>1997
<BR>
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