Thanks!
As to the "insert coin" sound speed, I figured it out. If you insert a coin before the first demo plays, it will play at the slow tempo. If you insert it after the demo has finished, it will run at the fast tempo. On 0.193, the "slow" version is as fast as the "fast" version normally is, and the "fast" version is twice as fast again. So the insert coin sound speed variation appears to be a bug in the real game, and has absolutely nothing to do with that YM2149 half-speed pin setting, or the recent clock speed regression.
There are still a couple problems, though, such as the enemy cars not making the proper sound when they spin out.
It makes the sound on this Japanese video of actual machine gameplay: https://www.youtube.com/watch?v=q-UDlQTQF0c
The sound also occurs in that video of the glitched PCB (which, while it is missing the YM2203's PSG channels, does seem to play the AY-3-8910 sounds): https://www.youtube.com/watch?v=G5-CekPrzo0
And the spinout sound is also in evidence in an episode of Game Center CX where Arino plays the game in an arcade.
The music in the German castle level also seems to have an instrument that sounds too screechy in MAME. It sounds better in the Hamster Arcade Archives version, but I don't fully trust the accuracy of that version, since it has the music running a bit too fast (not double speed, but it's still a bit quicker), it's also missing the car spin-out sound, and the ceiling bump sound is different than MAME (the sound in MAME is the one that matches the actual machine footage in the Game Center CX episode, and the Japanese arcade video I found).
For a possibly more arcade-accurate example, the glitchy PCB video I linked above is of the same castle level, and that instrument that sounds screechy in MAME sounds more pleasing to my ear; even though the YM2203 PSG channels are missing, the distorted instrument in MAME is part of the FM channel that is playing in this video, so do you think it's still a valid reference for how that high-pitched instrument on that level's music is meant to sound?
Edited by TServo2049 (01/14/18 12:14 AM)
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Re: City Connection fast audio? (MAME 0.193)
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