vgmrips

Title	Air Combat
Composer	Hiroyuki Kawada
System	Namco System 21
Sound Chips	YM2151, C140
Tracks	7
Playing time	9:54
Pack author	BoxCubed
Pack version	1.00
Last Update	2023-01-12

Note
Requires VGMPlay/in_vgm 0.50.0+ for proper playback.

The pitch of C140 is off. This is probably because the c140 clock is set to the wrong number.
When I set the c140 clock to 0x7d00, I got the correct pitch.

The clock should be correct for the libvgm-based VGMPlay versions(0.50.0+), the clock value you have is based on older versions of VGMPlay thus it's incorrect. Now, I do have to relog these in the future because the sound update rate is incorrect since Namco System 21 shares the same sound system as the Namco System 2. Once March rolls over, this is the first thing on my list I want to tackle.