Sampled by Shiru 08'2019

This SF2 packs the sound of a few ZX Spectrum 48K beeper music engines
developed by Lyndon Sharp in 1989-91. In short, this computer from 1982
lacked any sound hardware besides the speaker connected directly to an
I/O port, and all sound had to be generated by the main CPU. Synthesizer
programs that produced sounds are called engines, they all has different
features and sounds.

Lyndon Sharp's sound routines had very distinctive sound, especially
the drums. There are three known routines:

MB  - based on the popular Music Box with addition of seemingly sampled
      yet synthetic drums. First heard in Super Dragon Slayer game from
      1989. This engine featured two square wave channels with different
	  volume. In this SF2 only one volume level has been captured.
'89 - an updated version of the previous engine with similar drums, but
      totally different tone channels, featuring kind of phasing fat
	  sound. Heard in such games as Mig-29 or Zanthrax.
'91 - next update of the engine, now it has much clearer sampled drums.
      Heard in the Bubble Dizzy.


The sounds has been sampled using an emulator. There is one sample per
three semitones, to catch the roughness and imperfection of the original
sounds, but the sounds has been tuned up to proper musical tuning.


00: MB Tone
01: '89 Tone
02: '91 Tone
03: MB Drums
   C-2 Kick
   D-2 Snare
   E-2 Hat-like sound
   F-2 Another drum
   G-2 Another drum
   A-2 Another drum
04: '89 Drums
   C-2 Kick
   D-2 Snare
   E-2 Hat-like sound
   F-2 Tom-like sound
   G-2 Another drum
   A-2 Another drum
05: '91 Drums
   C-2 Kick
   D-2 Snare
   E-2 Hat
   F-2 Tom
   
  
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