For anyone developing their own emulator and wanting some SPCs to test their bent line gain mode implementation here are some SPCs that use that particular mode. The use of bent line gain mode appears to be extremely rare relative to the 32,000+ SPCs that exist so I thought this (incomplete) list might be helpful. The bent line gain mode has some interesting and obscure quirks so testing it thoroughly is important.
Tracks that use Bent Line Gain Mode (All of these tracks start using Bent Line Gain mode within the first 2048 output samples)
Tracks that use Bent Line Gain Mode (All of these tracks start using Bent Line Gain mode within the first 2048 output samples)
Code:
Corn Buster (cornb) - All tracks except track 01
Home Improvement (himp) - Tracks 10, 17
Iron Command (icom) - Tracks 02, 09, 13, v01
Indiana Jones' Greatest Adventure (ijga) - All tracks except 07, 11, 13-16, s01
Legend (leg) - All tracks except 09, 10
Mortal Kombat 2 (mk2) - All tracks except 01, 02a
Nightmare Busters (nibus) - All tracks
N-Warp Daisakusen (nwd) - All tracks
Oscar (oscar) - All tracks except 01-05
Pitfall: The Mayan Adventure (pfma) - Tracks 47, 59, 67, s01-s12, v01-v03
Race Drivin' (raced) - Tracks 06, 09, b03
Super Turrican 2 (turr2) - All tracks except 01, 02, 27, 28
Home Improvement (himp) - Tracks 10, 17
Iron Command (icom) - Tracks 02, 09, 13, v01
Indiana Jones' Greatest Adventure (ijga) - All tracks except 07, 11, 13-16, s01
Legend (leg) - All tracks except 09, 10
Mortal Kombat 2 (mk2) - All tracks except 01, 02a
Nightmare Busters (nibus) - All tracks
N-Warp Daisakusen (nwd) - All tracks
Oscar (oscar) - All tracks except 01-05
Pitfall: The Mayan Adventure (pfma) - Tracks 47, 59, 67, s01-s12, v01-v03
Race Drivin' (raced) - Tracks 06, 09, b03
Super Turrican 2 (turr2) - All tracks except 01, 02, 27, 28