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1-bit, Z80 and ULA

Sinclair spectrum Sinclair spectrum

This kind of music, which is very recognisable, originates from the beginning of computers, but also on Sinclair Spectrum ZX 48 which pushed the original limits.

Instead of being generated by a dedicated chip, the music is created by the fast speed interaction between the CPU (Zilog Z80 for the ZX 48) and the speaker (beeper). But instead of being a simple beep, the high frequency duty can create more richer sounds, and several voices (up to 16).

Original compositions

  • Album « 1-myth » :

  1. Rêveries et souvenirs (qchan) : musiques/electro/garvalf_-_z80_-_reveries_atari_xl.mp3
  2. Infravision (ntropic)
  3. Die verlassenen Kraft (anteater)
  4. Rotor (octode) : ⇩ tap ♫ musiques/electro/garvalf_-_z80_-_1-myth_04_rotor_octode.ogg
  5. Incantation (tritone) : ⇩ AYM ♫
  6. Vapeurs d'alcool (qchan) : ⇩ tap ♫ ⇩ AYM ♫ musiques/electro/garvalf_-_z80_-_1-myth_06_vapeurs_alcool_qchan.ogg
  7. Idunns hevn (anteater)
  8. Quelques vieux souvenirs (tritone)
  9. * * (zx16)

Playing tools

  • Fuse (linux/unix, mac os x, windows), zx 48 emulator, for playing .tap files. You can also send them into your real sinclair spectrum, if you own one.
  • ZXtune for playing several soundchip formats. Some 1-bit music can be embeded into the .ay format.
  • http://bulba.untergrund.net/emulator_e.htm (ay & sndh)

Composing tools

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