In addition, both tracks with PCM drums ('BGM1' and 'BGM3') have the original kick and snare tuning as heard in the TTS '90 demo, the Tera Drive store demo, and the Sega Shinsaku Soft Video build.

No noise channel imitating a shuffle hi-hat.

(The final version's melody transposes FM channel #6 up one octave, to play intervals.)

The melody line is played by two detuned FM voices at the same midrange octave, resulting in a mellower sound.

The overall arrangement is a bit barren compared to the final BGM.

Missing the descending arpeggio in the intro, and the synth chords.

Three alternate versions of Sonic tracks appeared as part of Sega Music Collection, a collection of BGMs from several Mega Drive titles which was distributed digitally in Japan via the Sega Game Toshokan dial-up service.Īs heard in this videotape recording of a user's online session with the service, this version of Green Hill's BGM matches the recording of the Tokyo Toy Show '90 demo music, and all three tracks match the BGM for the Tera Drive store demo.Īll three tracks have noticeable differences compared to the final game's BGM. The stage select text is positioned upwards, too, possibly because of the lack of slots like Final Zone. It's possible that Scrap Brain/Clock Work Act 3 had the boss fight in it, similar to the other Acts. Some acts have Xs listed after them (possibly to mark if they were incomplete), and Final Zone is missing from the list.

Later on, the palette got changed to the final's sepia-tone feel. The stage select once used a bluish-grey palette instead of a sepia-tone one. (Interestingly, this title screen heavily resembles the one from the 8-bit versions.) Since the title screen shares the same art/palettes as Green Hill, it used to have the differently detailed background in early pre-release materials before it got adjusted to resemble the final's background not too long afterwards. The title screen of the build shown at the Tokyo Toy Show has a smaller banner (and 'SONIC' text).

Sonic 1 beta sprite